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  • METEOROLOGY AND CLIMATOLOGY  (2,744)
  • 1980-1984  (1,773)
  • 1975-1979  (971)
Collection
Keywords
Years
Year
  • 1
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    Wind estimates from cloud motions: Result of an in situ aircraft verification experiment (1977)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: A world wide system of 5 geostationary satellites is being established with a primary objective: the estimation of winds from cloud motions. A series of aircraft experiments were carried out to perform an in situ verification of the satellite cloud winds, under undisturbed to moderately disturbed oceanic weather regimes.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 235-239
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  • 2
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    Joint Airport Weather Studies (AWS) project (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The joint airport weather studies (JAWS) project is discussed. The major objectives of the JAWS Project are a fundamental description of the phenomenon, a determination of the hazard potential and a definition of a protection and warning system, all of which are relative to low level wind shear. Aspects of the low level wind shear phenomenon. The principal focus, however, is the microburst. The microburst is fundamentally a rather simple atmospheric flow. It is a downdraft that, upon approaching the surface, spreads out horizontally, producing a diverging radial flow in all directions. For any direction that an aircraft flies through the microburst, it will first encounter increasing head winds; then the remnants of the downdraft; and then, increasing tail wind.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 85-95
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  • 3
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    Lightning strike experience in the NASA F-106B storm hazards program (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: A heavily instrumented F-106B aircraft was flown in thunderstorms to gather data for characterizing lightning at aircraft operating altitudes. Conventional weather finding techniques are supplemented with UHF lightning mapping radar to select the most active storm cells and the most likely altitude for obtaining direct lightning strikes to the airplane. One hundred seventy-six strikes were obtained in a 3 year period, mostly at an altitude of above 25,000 feet.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 63-65
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  • 4
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    Wind shear and vortex wake research in UK, 1982 (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: A wind shear and vortex wake and their impact on aircraft were investigated. The systems and advice to help pilots, and rational scientific methods to assist in advising certification authorities and those interested in improving flight safety were developed. Wind Shear and Vortex Wakes are related, they are both invisible enemies of aircraft in the form of large disturbances in the atmosphere, both cause major accidents. Problems of building wakes at airports are is considered. Research on wind shear was initiated by the American FAA following the Boston, New York and Denver accidents to civil airliners. This resulted in: useful advice to pilots about wind shear; better attempts by the meteorologists at forecasting wind shear conditions; and useful ideas for wind shear measurement and warning systems. Three major research tasks are outstanding: (1) Worldwide measurements to give reliable estimates of probability and details of the forms of large wind shears; (2) Developments of real time wind shear measuring systems for ground or airborne use; and (3) Establishing relationships between measured wind shear and the potential hazard to an aircraft, or class of aircraft.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 66-83
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  • 5
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    Marked surface inversions and wind shear: A safety risk for departing aircraft (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Marked surface inversions occur most frequently in dry continental climates, where low atmospheric humidity allows heat transfer by long wave thermal radiation. In the northern latitudes, surface inversions reach their maximum intensity during the winter, when the incoming Sun's radiation is negligible and radiative cooling is dominant during the long nights. During winter, air mass boundaries are sharp, which causes formation of marked surface inversions. The existence of these inversions and sharp boundaries increase the risk of wind shear. The information should refer to marked inversions exceeding a temperature difference of 10 deg C up to 1000 feet. The need to determine the temperature range over which he information is operationally needed and the magnitude of the inversion required before a notification to pilots prior to departure is warranted are outlined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 61-62
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  • 6
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    A cursory glance at results from NASA's B-57B gust gradient program (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The Gust Gradient Program is a data intensive effort involving tripple Doppler radar, a surface weather station mesonet and other aircraft. The Joint Airport Weather Studies was utilized to gain additional data. The data were used to fill in the gap in turbulence modeling.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 38-42
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  • 7
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    GEM: Statistical weather forecasting procedure (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The objective of the Generalized Exponential Markov (GEM) Program was to develop a weather forecast guidance system that would: predict between 0 to 6 hours all elements in the airways observations; respond instantly to the latest observed conditions of the surface weather; process these observations at local sites on minicomputing equipment; exceed the accuracy of current persistence predictions at the shortest prediction of one hour and beyond; exceed the accuracy of current forecast model output statistics inside eight hours; and be capable of making predictions at one location for all locations where weather information is available.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 42-44
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  • 8
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    Department of Defense meteorological and environmental inputs to aviation systems (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Recommendations based on need, cost, and achievement of flight safety are offered, and the re-evaluation of weather parameters needed for safe landing operations that lead to reliable and consistent automated observation capabilities are considered.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 19-20
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  • 9
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    Aviation weather services (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The primary responsibilities of the National Weather Service (NWS) are to: provide warnings of severe weather and flooding for the protection of life and property; provide public forecasts for land and adjacent ocean areas for planning and operation; and provide weather support for: production of food and fiber; management of water resources; production, distribution and use of energy; and efficient and safe air operations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 14-16
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  • 10
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    Federal Aviation Administration weather program to improve aviation safety (1983)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The implementation of the National Airspace System (NAS) will improve safety services to aviation. These services include collision avoidance, improved landing systems and better weather data acquisition and dissemination. The program to improve the quality of weather information includes the following: Radar Remote Weather Display System; Flight Service Automation System; Automatic Weather Observation System; Center Weather Processor, and Next Generation Weather Radar Development.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 6th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 21-25
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  • 11
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    On the effect of temporal sampling on the observation of mean rainfall (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Rainfall characteristics using data from dense recording raingage networks is reviewed. Data from such networks have quantified temporal and spatial rainfall distributions, and have supplied specialized information about local and orographic effects. The natural variability, temporally and spatially, for annual, seasonal, monthly, and individual events is treated. Especially important are the spatial variations of precipitation as a function of synoptic type, precipitation type, amount, and duration. Results from dense raingage networks in Illinois, and some data from other climatic regions is also treated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Precipitation Meas. from Space:; 8 p
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  • 12
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    Prospects for measuring phytoplankton bloom extent and patchiness using remotely sensed color images: An example (1981)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: A 10 channel scanning radiometer, built as a prototype for the coastal zone color scanner on the Nimbus 7 satellite, was flown on a high altitude aircraft during a Gymnodium breve bloom along the west coast of Florida. The remotely measured ocean color imagery shows what is probably the patchy structure of a G. breve bloom extending over a 60 km by 100 km area. This conclusion is based on visual inspection of bathymetry to infer bottom reflection trends and on a single growth truth measurement of B G. breve obtained the previous day. The image shows coherent blooms which extend scales up to 60 km in length.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 680-685
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  • 13
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    Application of a snowmelt-runoff model using LANDSAT data (1980)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: The snowmelt-runoff model developed for two small central European watersheds simulate daily streamflow on the 228 sq km Dinwoody Creek basin in Wyoming, using snowcover extent for LANDSAT and conventionally measured temperature and precipitation. For the six-month snowmelt seasons of 1976 and 1974, the simulated seasonal runoff volumes were within 5 and 1%, respectively, of the measured runoff. Also the daily fluctuations of discharge were simulated to a high degree by the model. Thus far the limiting basin size for applying the model has not been reached, and improvements can be expected if the hydrometeorological data can be obtained from a station inside the basin. LANDSAT provides an efficient way to obtain the critical snowcover input parameter required by the model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 745-760
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  • 14
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    Arctic Sea ice decay simulated for a CO2-induced temperature rise (1981)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: A large scale numerical time-dependent model of sea ice that takes into account the heat fluxes in and out of the ice, the seasonal occurrence of snow, and ice motions was used in an experiment to determine the response of the Arctic Ocean ice pack to a warming of the atmosphere. The degree of warming specified is that expected for a doubling of atmospheric carbon dioxide with its associated greenhouse effect, a condition that could occur before the middle of the next century. The results of three 5-year simulations with a warmer atmosphere and varied boundary conditions were: (1) that in the face of a 5 K surface atmospheric temperature increase the ice pack disappeared completely in August and September but reformed in the central Arctic Ocean in mid fall; (2) that the simulations were moderately dependence on assumptions concerning cloud cover; and (3) that even when atmospheric temperature increases of 6-9 K were combined with an order-of-magnitude increase in the upward heat flux from the ocean, the ice still appeared in winter. It should be noted that a year-round ice-free Arctic Ocean has apparently not existed for a million years or more.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 687-700
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  • 15
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    The 1977 tundra fire at Kokolik River, Alaska (1981)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: During the summer of 1977, fire totaled 44 sq km of tundra vegetation according to measurements using LANDSAT imagery. Based on the experience gained from analysis of this fire using ground observations, satellite imagery, and topographic maps, it appears that natural drainages form effective fire breaks on the subdued relief of the Arctic coastal plain and northern foothills. It is confirmed that the intensity of the fire is related to vegetation type and to the moisture content of the organic rich soils.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 660-670
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  • 16
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    Development of the operational program for satellite meteorology (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: The geostationary and polar satellites comprising the current operational system are discussed. The data acquisition capabilities of both satellite types and their complementary functions are reviewed. The advanced very high resolution radiometer on the TIROS N satellites is particularly addressed along with the imaging and atmospheric sounding instrumentation aboard the GOES satellites. The dissemination of the satellite data to the prospective users is also discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 34-40
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  • 17
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    The utilization of spaceborne microwave radiometers for monitoring snowpack properties (1980)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Snow accumulation and depletion at specific locations can be monitored from space by observing related variations in microwave brightness temperatures. Using vertically and horizontally polarized brightness temperatures from the Nimbus 6 electrically scanning microwave radiometer, a discriminant function can be used to separate snow from no snow areas and map snowcovered area on a continental basis. For dry snow conditions on the Canadian high plains, significant relationships between snow depth or water equivalent and microwave brightness temperature were developed which could permit remote determination of these snow properties after acquisition of a wider range of data. The presence of melt water in the snowpack causes a marked increase in brightness temperature which can be used to predict snowpack priming and timing of runoff. As the resolutions of satellite microwave sensors improve the application of these results to snow hydrology problems should increase.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 745-760
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  • 18
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    Seasonal and daily snowmelt runoff estimates utilizing satellite data (1980)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Methods using snowcovered area to update seasonal forecasts as snowmelt progresses are also being used in quasi-operational situations. The input of snowcovered area to snowmelt models for short term perdictions was attempted in two ways; namely, the modification of existing hydrologic models and/or the use of models that were specifically designed to use snowcovered area. A daily snowmelt runoff model was used with LANDSAT data to simulate discharge on remote basins in the Wind River Mountains of Wyoming. Daily predicted and actual flows compare closely, and, summarized over the entire snowmelt season (April 1 - September 30), the average difference is only three percent. The model and snowcovered area data are currently being tested on additional watersheds to determine the method's transferability.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci. Collected Reprints 1978 - 1979, Vol. 2; p 742
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  • 19
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    The 1977 tundra fire in the Kokolik River area of Alaska (1981)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Presumably caused by lightning, a large fire occurred due east of Point Lay several kilometers southwest of the Kokolik River, the farthest north a fire was ever fought by Bureau of Land Management personnel in Alaska. The progress and area extent of the fire were determined by analysis of LANDSAT MSS band 5 and 7 imagery. Low altitude observations from helicopter showed the fire burned a range of vegetation and relief types which included low polygonized and upland tussock tundras. The burned area appeared wetter on the surface than the unburned area, due to a lack of moisture absorbing organic matter and the possible release of moisture from the deeper thawed zone. Suggestions for future investigations of the effects of fire on tundra and permafrost terrains are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Goddard Lab. for Atmospheric Sci., Collected Reprints 1978 - 1979, Vol. 2; p 671-675
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  • 20
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    Early program development and implementation (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: Programs for the development and operation of meteorological satellites from the TIROS 1 satellite and the establishment of NASA through the 1960's are described. The technical problems confronted in the development of the early satellite systems are discussed in addition to issues in international involvement and program support. The TIROS and Nimbus series satellites are primarily addressed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 5-33
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  • 21
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    The climatic effect of explosive volcanic activity: Analysis of the historical data (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: By using the most complete available records of direct beam radiation and volcanic eruptions, an historical analysis of the role of the latter in modulating the former was made. A very simple fallout and dispersion model was applied to the historical chronology of explosive eruptions. The resulting time series explains about 77 percent of the radiation variance, as well as suggests that tropical and subpolar eruptions are more important than mid-latitude eruptions in their impact on the stratospheric aerosol optical depth. The simpler climatic models indicate that past hemispheric temperature can be stimulated very well with volcanic and CO2 inputs and suggest that climate forecasting will also require volcano forecasting. There is some evidence that this is possible some years in advance.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Atmospheric Effects and Potential Climatic Impact of the 1980 Eruptions of Mt. St. Helens; p 191-202
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  • 22
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    Distribution of Mount St. Helens dust inferred from satellites and meteorological data (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: Visible and infrared pictures from two Geostationary Operational Environmental Satellite Systems satellites, in circular orbits at about 19,000 nautical miles, are available continuously at approximately 30 minute intervals. Still pictures and film loops from this system vividly depict the events associated with the May 18, 1980 eruption of Mount St. Helens. The initial explosion, shock wave, and visible horizontal dust distribution during the following week are readily apparent. Meteorological wind and height fields permit the inference of the vertical distribution of volcanic dust as well as explain the atmospheric behavior which caused the visible and nonvisible dust distribution.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Atmospheric Effects and Potential Climatic Impact of the 1980 Eruptions of Mt. St. Helens; p 131-140
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  • 23
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    Comments on satellite meteorology from geostationary satellites (1982)
    In:  CASI
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    Publication Date: 2006-04-12
    Description: Examples of the use of geostationary satellites in meteorology are given. Studies of the rate of change of cumulus clouds and cloud systems and wind parameter determination from cloud motions are reviewed. Computer processed imagery products are also discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 72-83
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  • 24
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    Military applications evolution and future (1982)
    In:  CASI
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    Publication Date: 2006-04-12
    Description: The Defense Meteorological Satellite Program is described with particular emphasis on the military applications of METSAT data. Satellite operational support, data processing and image quality requirements are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 41-47
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  • 25
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    Early satellite program developments (1982)
    In:  CASI
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    Publication Date: 2006-04-12
    Description: A historical overview of the pioneer projects for the development of meteorological satellites is given. In addition, the parallel development of the responsible space agencies and panels is addressed. The Vanguard 2 satellite, the first Earth radiation experiment, and the vidicon equipped TIROS-1 satellite are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 1-4
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  • 26
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    Problems in the climatology of the 1980 Mount St. Helens eruptions (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: A brief review of the effects of climate and weather on the 1980 Mount St. Helens eruptions and the subsequent dispersion of ash and gases and the reciprocal influences of the eruptions on climate and climatology is presented. The effects of mesoscale destruction of snow fields and vegetation, a revised mountain profile, and ash deposits are addressed along with impacts on hemispheric climate and disruption of normal climatological observations, in the areas directly affected by the explosions and ashfall. Environmental and economic consequences are also considered.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Atmospheric Effects and Potential Climatic Impact of the 1980 Eruptions of Mt. St. Helens; p 203-209
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  • 27
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    Lightning research: A user's lament (1984)
    In:  CASI
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    Publication Date: 2006-02-14
    Description: As a user of devices and procedures for lightning protection, the author is asking the lightning research community for cookbook recipes to help him solve his problems. He is lamenting that realistic devices are scarce and that his mission does not allow him the time nor the wherewithal to bridge the gap between research and applications. A few case histories are presented. In return for their help he is offering researchers a key to lightning technology--the use of the Eastern Test Range and its extensive resources as a proving ground for their experiment in the lightning capital of the United States. A current example is given--a joint lightning characterization project to take place there. Typical resources are listed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Langley Research Center Intern. Aerospace and Ground Conf. on Lightning and Static Elec.; 6 p
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  • 28
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    A study of the geographic coverage properties of a satellite borne Doppler lidar wind velocity measuring system (1982)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Geographic coverage frequency and geographic shot density for a satellite borne Doppler lidar wind velocity measuring system are measured. The equations of motion of the light path on the ground were derived and a computer program devised to compute shot density and coverage frequency by latitude-longitude sections. The equations for the coverage boundaries were derived and a computer program developed to plot these boundaries, thus making it possible, after an application of a map coloring algorithm, to actually see the areas of multiple coverage. A theoretical cross-swath shot density function that gives close approximations in certain cases was also derived. This information should aid in the design of an efficient data-processing system for the Doppler lidar.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Alabama Univ. in Huntsville The 1981 NASA(ASEE Summer Fac. Fellowship Program; 26 p
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  • 29
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    The Joint Airport Weather Studies Project (1981)
    In:  CASI
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    Publication Date: 2006-02-14
    Description: A block diagram of the joint airport weather studies program is presented. Background leading to the development of the program is reviewed. Basic studies, aircraft performance, and detection and warning techniques used to develop fine scale structure of thunderstorm dynamics and kinematics in the vicinity of a major airport; effect of thunderstorm low level wind shear on aircraft performance; and development of real time testing of flow level wind shear detection and warning techniques and displays are described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 91-95
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  • 30
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    Prototype Regional Observation and Forecast System (PROFS) (1981)
    In:  CASI
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    Publication Date: 2006-02-14
    Description: The prototype regional observation and forecast system (PROFS) outputs are demonstrated, functional design specifications to be used to procure and implement operational systems are outlined. Advanced candidate technologies are evaluated as an integral part of the process that leads to these outputs. Evaluation insures that future weather service systems will contain the optimum mix of technologies to be most cost effective in reducing the annual losses and deaths that are directly attributed to severe weather.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 81-85
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  • 31
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    Progress on low altitude cloud icing research (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The icing environment at altitudes below 10,000 feet were studied. The following questions are asked, are: (1) existing aircraft certification criteria applicable; (2) too stringent on icing for helos; (3) based on accurate data; (4) appropriate for low (10,000 ft) altitudes? The research plan is outlined: review historical icing data, obtain new measurements, collect modern icing data from other groups, and recommend LWC, OAT, and MVD criteria for helicopters. Estimated accuracies and known sources of error are included. It is concluded that the net effect of possible sources of error of both signs is uncertain.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 59-63
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    The program of the Techniques Development Laboratory in aviation weather forecasting (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Some operational and experimental products developed for aviation weather forecasting are briefly described. Experimental products include surface dew point, obstructions to vision, boundary layer model, computer-worded terminal forecasts, terminal alerting procedure, generalized equivalent Markov, and radar forecasts (0-2 hours).
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 209-212
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  • 33
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    Doctor Fujita's microburst analysis at Chicago (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Doppler radar measurements of an intense wind shear occurance are discussed. The data suggest the presence of an incredibly strong low level jet outflow component of the microburst event, reaching 60 knots only 50 meters above the surface. Evidence also suggests that microbursts more typically occur in very weak thunderstorms that have hardly reached thunderstorm stage.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 201-202
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  • 34
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    The microburst: Common factor in recent aircraft accidents (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The phenomenology of one class of strong thunderstorm downdrafts, microbursts, is described. Several aircraft accidents are analyzed in which a microburst was involved and a concept for an early warning wind shear sensor is presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 186-200
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  • 35
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    Clear air turbulence forecasting techniques (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A method to improve clear air turbulence (CAT) forecasting by more effectively using the currently operational rawinsonde (RW) system is discussed. The method is called the Diagnostic Richardson Number Tendency (DRT) technique. The technique does not attempt to use the RW as a direct detector of the turbulent motion or even of the CAT mechanism structure but rather senses the synoptic scale centers of action which provide the energy to the CAT mechanism at the mesoscale level. The DRT algorithm is deterministic rather than statistical in nature, using the hydrodynamic equations (equations of motion) relevant to the synoptic scale. However, interpretation, by necessity, is probabilistic. What is most important with respect to its operational implementation is that this method uses the same input data as currently used by the operational National Meteorological Center prognostic models.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 203-208
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  • 36
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    The 1979 clear air turbulence flight test program (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A clear air turbulence (CAT) flight test to evaluate and test four different sensors in the detection and measuring of CAT and other meteorological targets that relate to turbulence is discussed. The primary types of CAT investigated were mountain wave CAT, jetstream CAT, CAT in cirrus clouds, and CAT in frontal wind shears, troughs, and ridges. The sensors included the CO2 pulsed Doppler lidar and three radiometers. One of the radiometers, at a frequency of 55.5 GHz, looked at atmospheric temperature structure. Another, at a frequency of 180.1 GHz, looked at atmospheric water vapor and investigated the feasibility of measuring at the microwave frequency the turbulence features seen in the infrared (IR) frequencies. An IR radiometer at 27 to 33 microns was the fourth sensor. This last device and the temperature structure radiometer worked well at all flight levels.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 171-179
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  • 37
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    Very short range forecasts of visibility and ceiling (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The development of methods for the short range forecasting of visibility and ceiling conditions is discussed. Short range forecasts of one hour or less (5 or 30 minutes), immediately after a series of local observations can be expected to be more accurate and reliable than any forecast of more than one hour. These forecasts can be accomplished by the operational implementation of fully automated aviation observation systems and the utilization of statistical techniques such as the Generalized Equivalent Markov model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 180-185
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  • 38
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    Measuring weather for aviation safety in the 1980's (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Requirements for an improved aviation weather system are defined and specifically include the need for (1) weather observations at all airports with instrument approaches, (2) more accurate and timely radar detection of weather elements hazardous to aviation, and (3) better methods of timely distribution of both pilot reports and ground weather data. The development of the discrete address beacon system data link, Doppler weather radar network, and various information processing techniques are described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 162-167
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  • 39
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    Observing lightning from ground-based and airborne stations (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The operational designs and performance capabilities of ground-based and airborne lightning detection systems are reviewed. The airborne Stormscope system is described and compared with onboard radar and the lightning detection and ranging system (LDAR). Two examples of difference-in-time-of-arrival systems for detecting spherics from discharges in electrified clouds are described: (1) The LDAR system and (2) Taylor's lightning mapping system. Next, an interferometric system adapted to lightning location is discussed. Finally, systems that are based upon crossed-loop magnetic direction finding principles but which have been refined and improved to accurately locate lightning discharges to ground are reviewed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 130-139
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  • 40
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    Aeronautical concerns and National Aeronautics and Space Administration atmospheric electricity projects (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The phenomenology of lightning and lightning measurement techniques are briefly examined with a particular reference to aeronautics. Developments made in airborne and satellite detection methods are reported. NASA research efforts are outlined which cover topics including in-situ measurements, design factors and protection, remote optical and radio frequency measurements, and space vehicle design.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc.: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 140-160
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  • 41
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    Remote probing of wind and wind shears (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The ability of various types of remote probes to measure wind is discussed. Two important advantages over in-situ sensors are reported: (1) their ability to measure atmospheric parameters without disturbing the air flow; (2) their ability to scan through large volumes of the atmosphere with relative ease. Direct measurement sensors such as anemometers and wind vanes are categorized into two groups; active and passive. Acoustic radar, microwave radar, and lidar are included in the first group and the latter group is typified by the infrared radiometers.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 109-124
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  • 42
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    Winds and wind shear in-situ sensors (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The problem of development of instrumentation for providing wind speed and direction information directly or indirectly to a pilot in the cockpit is considered. The pilots need for horizontal wind information at various stages of flight (i.e., at liftoff, in approach and departure corridors, and even in flight outside the terminal area) are emphasized.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 82-108
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  • 43
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    Clear air turbulence: Historical comments (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The basic reference material for gust design criteria are cited. The status of clear air turbulence meteorology (forecasting and detection) is discussed. The directions of further research technology is indicated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meterol. and Environ. Inputs to Aviation Systems; p 71-81
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  • 44
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    Aircraft icing instrumentation: Unfilled needs (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: A list of icing instrumentation requirements are presented. Because of the Army's helicopter orientation, many of the suggestions are specific to rotary wing aircraft; however, some of the instrumentation are also suitable for general aviation aircraft.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 61-65
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  • 45
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    Icing instrumentation (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The types and usage categories of icing instrumentation are discussed. The state-of-the-art for the technology governing the use of icing instrumentation is reported with particular emphasis on ground based facilities for icing tests.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 49-60
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  • 46
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    Turbulence: From a pilot's viewpoint (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The measurement of atmospheric turbulence is discussed in terms of a pilots viewpoint. Two areas of measurement are considered: frequency and severity of turbulence. Suggestions are given for helping the pilot solve the turbulence problem.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 66-70
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  • 47
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    Federal Aviation Administration and National Weather Service Aviation Research and Development (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: An overview is given of the developmental status of aviation weather services. Particular attention is given to justifying the need for better, more reliable service. The accomplishments of several automatic weather stations are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 45-48
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  • 48
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    Aviation meteorology research and development: A status report (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The dynamic and rapid growth of technology in the area of aviation meteorology research and development are described with emphasis on the measurement of hazardous weather phenomena. Aspects of both onboard instrumentation and ground based facilities are evaluated in terms of their effectiveness of in avoiding hazards due to atmospheric electricity and lightning. Methods of alleviating terminal are hazards such as fog, low visibility and ceilings are also described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 40-44
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  • 49
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    Survey of Workshops on Meteorological and Environmental Inputs to Aviation Systems (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Various aspects of aviation meteorology are discussed with respect to their relative effects on aircraft terminal operations. Existing data on turbulence and wind shear from aircraft and towers are summarized. The significance of obtaining more real time wind and temperature information is emphasized. The application and testing of various radiometer devices are also described. Airborne methods to indicate wind differences at flight altitude and at touchdown are reported.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Proc: Fourth Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 23-39
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  • 50
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    First Scientific Working Group Meeting of Airborne Doppler Lidar Wind Velocity Measurement Program, appendix J (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Three projects are suggested which could be done using the Doppler lidar. The first is a cooperative effort at BAO, the purpose of which is to check out instrumentation and contribute to boundary layer investigations at BAO. The second concerns unintended weather modification. Its purpose is to detect mechanisms by which regions of industry and urbanization modify weather. The cirrus cloud study proposes to characterize cirrus clouds by their lidar signal and to compare lidar and visually observed characteristics.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 5 p
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    Report of secondary flows, boundary layers, turbulence and wave team, report 1 (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: General criteria for a flight test option are that: (1) there be a good opportunity for comparison with other measurement techniques; (2) the flow to be measured is of considerable scientific or practical interest; and (3) the airborne laser Doppler system is well suited to measure the required quantities. The requirement for comparison, i.e., ground truth, is particularly important because this is the first year of operation for the system. It is necessary to demonstrate that the system does actually measure the winds and compare the results with other methods to provide a check on the system error analysis. The uniqueness of the laser Doppler system precludes any direct comparison, but point measurements from tower mounted wind sensors and two dimensional fields obtained from radars with substantially different sampling volumes are quite useful.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 8 p
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  • 52
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    Cooperative convective precipitation experiment (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The experiment strives to improve understanding of the physics of convective precipitation. Major emphasis is placed on obtaining a good description of the whole convective precipitation system. A framework is presented within which single, significant, tractable problems are investigated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 25 p
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    Severe storms measurement system real time data processing and displays (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The objectives of the system are to provide the system operator with real time system performance check and to provide data recording of all SSMS data. Meteorologists are provided with real time indication of meteorological data measurements including aid for directing flight profiles in real time and aid for directing SSMS operations. A day-to-day feedback is provided to meteorologists, system operators, and flight crews for flight planning on subsequent flight tests days.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 15 p
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    First Scientific Working Group Meeting of Airborne Doppler Lidar Wind Velocity Measurement Program, appendix C (1980)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The problem is to operate on two scalar fields to produce a vector field, to produce user products from the vector field, and to establish reliability of results. Data problems encountered include sparse measurements, irregular distribution, varying quality, imperfect orthogonality, aliasing due to sampling volume, and measurements not simultaneous. Desired algorithm characteristics, solution elements, and characteristics of the model are listed. The seven simulation elements, eight algorithm steps and the required user inputs are given.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 8 p
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  • 55
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    Report of convective phenomena team (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: A group meeting was assembled to focus on the planning of specific experiments, to establish some priorities, identify interested scientists who would like to participate, establish any special requirements, make recommendations on data processing, and to prepare flight plan outlines. Since the number of convective storms in the CCOPE (Cooperative Convective Precipitation Experiment) field experiment area are limited to only a few days during the operational time period the flight plans must be designed with a hierarchy of abort experiments so that the easily identified and lowest probability events should take priority until their quota is filled.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: First Sci. Working Group Meeting of Airborne Doppler Lidar Wind Velocity Meas. Program; 10 p
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  • 56
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    The MSFC Doppler lidar system, appendix B (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The development of pulsed and continuous wave Doppler lidars for atmospheric measurement is discussed. A description of how the lidar systems operate is presented. The scanning mode is also described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 40-42
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  • 57
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    Possible applications of MSFC Doppler lidar system, appendix C (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: An interpretation of the Doppler lidar return is presented. Possible applications of the system to severe storm research are discussed. The present project schedule of the Doppler lidar system is outlined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 43-46
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    Wind field measurement in the nonprecipitous regions surrounding storms by an airborne pulsed Doppler lidar system, appendix A (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Coherent Doppler lidar appears to hold great promise in contributing to the basic store of knowledge concerning flow field characteristics in the nonprecipitous regions surrounding severe storms. The Doppler lidar, through its ability to measure clear air returns, augments the conventional Doppler radar system, which is most useful in the precipitous regions of the storm. A brief description of the Doppler lidar severe storm measurement system is provided along with the technique to be used in performing the flow field measurements. The application of the lidar is addressed, and the planned measurement program is outlined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 31-39
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  • 59
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    Application of the Doppler lidar system to agricultural burning and air-sea interactions (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The Doppler lidar system is potentially a very powerful measurement system. Three areas concerning the system are discussed: (1) error analysis of the system to verify the results; (2) application of the system to agricultural burning in California central valley; and (3) oceanographic possibilities of the system.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 25
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  • 60
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    Measurement of phenomena associated with water clouds using Doppler lidar (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Doppler lidar measurements of phenomena associated with water clouds (such as aerosols) are discussed. The purpose of the measurements and details of executing the experiment are described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 20-24
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  • 61
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    Potential uses of the airborne Doppler lidar wind velocity measurement system (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Four aspects of the Doppler lidar are discussed: (1) error analysis of the system; (2) design of the first field program; (3) potential areas of application; and (4) verification of Doppler lidar data by independent measurements.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 16-17
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    Potential scientific research which will benefit from an airborne Doppler lidar measurement system (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Areas of research which can be significantly aided by the Doppler lidar airborne system are described. The need for systematic development of the airborne Doppler lidar is discussed. The technology development associated with the systematic development of the system will have direct application to satellite systems for which the lidar also promises to be an effective instrument for atmospheric research.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 13-15
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    Potential applications of the Doppler lidar measurements (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The potential application of the Doppler lidar measurements to the determination of material (e.g., water vapor) and energy budgets, momentum transports, etc., in the environment at all stages and in the development of convective clouds are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 18-19
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    Airborne Doppler lidar wind measuring system: Application to atmospheric problems (1980)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The ability to map velocities over a large area on one side of the aircraft flight path offers a number of opportunities to elucidate scientific questions related to atmospheric dynamics. Several types of experiments which are possible are described.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center Exploratory Meeting on Airborne Doppler Lidar Wind Velocity Meas.; p 11-12
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  • 65
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    Thunderstorm electric field modelling (1982)
    In:  CASI
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    Publication Date: 2006-02-14
    Description: Calculation of eletric field vectors within and near an isolated thundercloud (which has a given volume charge distribution) is envisaged. The maximum field strength within the thundercloud is calculated. The effects of screening layers, both above and below the thundercloud may be investigated, as well time-dependent potential problem. The study can lead to a better understanding of the charge distributions in a thundercloud, which in turn may shed some light on the actual mechanism of charging of a thundercloud.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Alabama Univ. in Huntsville The 1981 NASA(ASEE Summer Fac. Fellowship Program; 10 p
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  • 66
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    A summary of monthly mean simulation experiments with the GISS model (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The statistical results of 8 monthly mean simulation experiments with the GISS general circulation model are summarized for the Northern Hemisphere in terms of the fields of sea-level pressure, 500-mb. height, and 850-mb. temperature.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 323-327
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    Sampling analysis for the earth radiation budget satellite system mission (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A study was conducted to identify problems related to sampling the Earth's radiant energy budget and to define a satellite system with sufficient sampling to satisfy science requirements on global, zonal, and regional scales.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 153-157
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    A simple algorithm for inferring the vertical ozone profile from satellite measurements (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A general methodology for establishing and testing remote sensing inversion procedures has yielded a simple procedure for inverting BUV radiances.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 129-133
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    A statistical method for time-continuous assimilation of remote sounding temperatures (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A time-continuous statistical method is presented for the four-dimensional assimilation of remote sounding temperatures based on radiometric measurements from polar-orbiting satellites. This method is applied to DST-6 data from the NOAA-4 and Nimbus-6 satellites. Experiments are reported in which the state of the atmosphere throughout the test period was determined using a varying amount of satellite data and in which different methods were used for their assimilation. Data from the NOAA-4 satellite only, from Nimbus-6 only, and from both satellites together were used; the methods tested include different variations of the statistical method as well as more traditional methods. The conclusions are that: (1) satellite-derived temperature data can have a modest, but statistically significant positive impact on numerical weather prediction in the two-to-three day range; (2) this impact is highly sensitive to the quantity of data available; and (3) the assimilation method plays a major role in the magnitude of the impact for the same data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 93-103
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    Profiling of atmospheric water vapor with microwave radiometry (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Weighting functions were developed which express the water vapor information content of microwave radiometric measurements. Retrievals of water vapor profiles are performed using these weighting functions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 81-85
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    The evaluation by numerical simulation of the design for a Microwave Pressure Sounder (MPS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The potential accuracy of an active multifrequency millimeter-wave technique for the remote measurement of atmospheric pressure at the Earth's surface was investigated by numerical simulation.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 71-75
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    Cloud temperatures and prediction of hurricane intensity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Equivalent black body temperatures of clouds around tropical cyclones are used in a statistical technique to forecast changes in maximum winds for 24 hours in advance.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 41-45
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    A real-time subsynoptic, meso, and microscale severe storm forecast system (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A system of differential equations is integrated numerically in space and time over several different matrices in an effort to simulate the atmospheric wave structures which organize severe local storms. Preliminary results with case studies indicate that dynamical fields produced by the numerical simulations can be translated into very fine scale space and time zones where severe storm forecast indices can be developed. These fine scale indices are now available in real-time when run on Langley's STAR 100 computer system.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 29-33
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    Detection of severe storms through a tropospheric-ionospheric coupling mechanism (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Acoustic-gravity waves were detected by a ground-based ionospheric sounding array, and the location of the wave generation source was determined by a reverse group ray path computation. Computed sources of these waves were located near locations where tornadoes touched down from 2 to 4 hours later. It is suggested that the overshooting and ensuing collapse of convective turrets may be responsible for generating the acoustic-gravity waves observed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 11-15
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    Three dimensional cloud top changes related to thunderstorm severity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Digital infrared data from a geostationary satellite are used to study thunderstorm top growth rates and other parameters in relation to the occurrence of severe weather on the ground. Both the rate of upward growth of the thunderstorm top and the maximum height reached are shown to be useful parameters in the detection of severe thunderstorms.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 7-10
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    Climatological features revealed by ESMR derived oceanic rainfall maps (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Several new climatological patterns become apparent from the analysis of satellite-derived global oceanic rainfall maps. Five interesting features are briefly discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 135-139
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  • 77
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    The effect of sea ice extent on the climatology of the Giss general circulation model (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Two model simulations were calculated with the GISS general circulation model corresponding to hypothetical maximum and minimum January sea ice conditions in the north and south polar regions. Results indicate that there were large differences in the Northern Hemisphere circulation between maximum and minimum ice conditions in zonally averaged temperature, vertically averaged eddy sensible heat flux, and mean 500 mb geopotential height. The calculated differences are found to be greater than the inherent variability of the model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 105-109
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    Operation Aurorozone: An experiment in sun/weather (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Operation Aurorozone was a highly coordinated sequence of 33 rocket flights launched from Poker Flat, Alaska, in September 1976. The effects of aurorally produced X-rays on stratospheric neutral and electrical parameters was studied. The sun/weather coupling between upper and lower regions of the atmosphere is thought to be related to these middle atmospheric parameters. The results show a consistent depletion of ozone above 1 mb during three independent auroral events, with magnitudes in excess of those expected from the measured energy radiation sources. Simultaneously, enhanced conductivity changes were observed to occur in accord with the measured ionizing radiations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 121-125
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    Design and testing of a new planetary boundary layer parameterization (1977)
    In:  CASI
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    Description: A new planetary boundary layer parameterization was developed. Tests included forecasting experiments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 117-120
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    Numerical simulation of flow near steep mountains with a potential enstrophy conserving scheme for the shallow water equations (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Numerical experiments show that use of a potential enstrophy conserving scheme drastically improves numerical simulation of flow near steep mountains.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 111-115
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  • 81
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    Remote sensing of the boundary layer (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Limited information about the boundary layer stratification is obtained from remote infrared spectral measurements in the water vapor window region. A global map of the average strength of the water vapor spectral lines in the 9 micron window region derived from Nimbus 4 IRIS data is presented to indicate this boundary layer information. Presence of deep convective layer in the intertropical convergence zone and trade wind inversion over the subtropical oceanic high pressure systems are appropriately revealed in this map.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 77-80
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  • 82
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    Wind speed and aerosol optical thickness estimates from aircraft observations of sea flitter (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Aircraft observed radiances were used to measure surface wind speed and aerosol thickness. Results show that the surface wind speed is related to the width of the glitter pattern.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 67-70
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    Objective tropical cyclone analysis and forecasting technique using conventional and Nimbus-5 electrically scanning microwave radiometer measurements (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The ADAPT empirical analysis programs, based on finding an optimal representation of the data in the Karhunen-Loeve sense, were applied to 120 observations of twenty-nine 1973 and 1974 Pacific tropical cyclones. Each observation consists of NIMBUS-5 electrically scanning microwave radiometer (ESMR) radiation measurements at 267 grid points covering and surrounding the tropical cyclone plus nine other non-satellite derived descriptors. Analysis and forecast algorithms to estimate storm motion and intensity were developed for times ranging from the observation time up to 72 hours later. The 24 hr wind speed forecasts with an accuracy of 11.7 knots and position forecasts with accuracies 15% better than persistence were demonstrated using independent tests.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 47-50
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    Latent heat calculations and their relationship to tropical cyclone intensity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Data from the Nimbus-5 electrically scanning microwave radiometer (ESMR) were used to calculate total storm latent heat release (LHR) and other precipitation parameters for over 100 satellite observations of Pacific Ocean tropical cyclones. The data are useful in determining the rainfall characteristics of these storms and appear to be potentially useful in monitoring them.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 35-39
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    Severe storms and their interaction with the environment (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A brief description is given of significant research accomplishments and of planned research on atmospheric variability and the interaction of severe storms with their environment using atmospheric variability experiments data. Use of the results for the assessment of satellite capabilities are described briefly.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 23-27
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    Summary report of the Weather Services Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Weather services to severe storms, turbulence, icing, visibility, and lightning are discussed. Each weather phenomenon area was explored in terms of needs, problems related to providing services, and availability of timely and appropriate information.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 234-236
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    Summary report of the Aircraft Design Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Aircraft models were designed to solve aircraft lightning, severe storms, turbulence, icing, and visibility problems. Analytical modeling, wind tunnel simulation tests, ground tests, and in-flight tests were conducted.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 229-238
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    Summary report of the Human Factors Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Reduced visibility as a human factors problem was studied in terms of the number of lives lost and cost of aircraft accidents and incidents. Human factors in flight through turbulence in detection and avoidance techniques, pilot and crew procedures for handling workloads and distractions caused by turbulence, and aircraft handling techniques for safe flights through turbulence are investigated. Education and training were reviewed in icing problems on aircraft. Pilots failure to recognize and detect wind shear in severe storms is examined. The pilots avoidance of lightning is discussed from the human factors point of view.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 219-228
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    Summary of the Aircraft Operations Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Severe storms and turbulence, icing, visibility, and lightning are discussed in new programs on aircraft operations. The education of pilots and ground service personnel are reviewed. More available information of weather programs and services are examined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 215-218
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    Summary report of the Lightning and Static Electricity Committee (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Lightning protection technology as applied to aviation and identifying these technology needs are presented. The flight areas of technical needs include; (1) the need for In-Flight data on lightning electrical parameters; (2) technology base and guidelines for protection of advanced systems and structures; (3) improved laboratory test techniques; (4) analysis techniques for predicting induced effects; (5) lightning strike incident data from General Aviation; (6) lightning detection systems; (7) obtain pilot reports of lightning strikes; and (8) better training in lightning awareness. The nature of each problem, timeliness, impact of solutions, degree of effort required, and the roles of government and industry in achieving solutions are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 203-214
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    Summary Report of the Icing Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Icing parameters have created problems and the problem areas that still exist today are presented. The problem areas include; (1) instrumentation; (2) test facilities; (3) weather forecasting of icing conditions; (4) meteorological design criteria; and (5) meteorological data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 193-199
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  • 92
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    Summary report of the Turbulence Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The effects of atmospheric turbulence are discussed. Aircraft design and aircraft operations are reviewed. Turbulence in terms of intensity and scale in design considerations was examined. Turbulence models were used in the form of discrete gusts, spectral distributions, and probability distributions. Various aspects of the design and operations problems, simulation and training factors of pilots, and weather services and forecasts are reported.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 185-191
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    The forecasting center of Meudon, France (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Main features of solar activity are described in relation to solar and geophysical forecasting. Spectroheliograms, radio and X-ray data, white light coronal observations, particles data, photospheric images, and photospheric magnetic fields are among the types of data used to identify the active centers and flares of the Sun. Forecasting and identification of geomagnetic activity is also discussed. The forecasting technique is described along with the types of users.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 1-11
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  • 94
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    Simulation study of a method for analyzing wide field of view radiometer measurements from satellites and some analysis of ESSA 7 data (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Method of relating wide field of view radiometer measurements from satellites to the Earth longwave flux field is simulated and is used to obtain zonal and global averages of longwave (LW) flux for ESSA 7.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 305-309
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  • 95
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    Comparison of the last two winter season monthly zonal cloud fractions as derived from Nimbus-6 ERB data (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Monthly zonal albedo determinations made by Nimbus-6 ERB were used to form monthly zonal cloud fractions. The Fall-Winter-Spring seasons of 1975-76 are compared with the same seasons 1976-77.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 289-293
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  • 96
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    A summary of Nimbus-6 temperature retrieval accuracy statistics for DST-5 and DST-6 (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Statistics compiled from Nimbus-6 temperature retrievals processed during the 18 August-4 September 1975 DST-5, and the 1 February-4 March 1976 DST-6 are addressed. All statistics were compiled from samples of colocated satellite sounding and radiosonde measurements. The colocation window is 222 km in space and 6 hours in time.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 271-276
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  • 97
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    Mesoscale convergence proceding thunderstorm development determined from cloud motions (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Convergence was determined from wind vectors derived from cloudtracking on 5 minute interval SMS-2 data using the AOIPS.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 247-251
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  • 98
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    Equations for the dynamics of gust fronts and shock waves (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Equations are presented for the growth or decay rates of moving and deforming vortex sheets (gust fronts) and shock waves. The equations exhibit a cross-coupling between these two types of surface discontinuity.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 225-227
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  • 99
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    Stereographic cloud heights from SMS/goes imagery (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Stereographic pairs of SMS/GOES images, generated simultaneously by the spin-scan cameras of each of two geostationary satellites (SMS 1 and SMS2), separated by 32 degrees of longitude on February 1, 1975, were analyzed photogrametrically to yield cloud heights with a two-sigma uncertainty of 500 meters. These cloud heights compare favorably with heights of the same clouds measured by radar and IR methods. The same SMS image pairs were used to measure mountaintop heights with a mean deviation of 0.24 km from cartographic values.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 229-233
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    Spectral energetics and predictability studies (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: One and two-dimensional spectral analyses were performed on the GISS general circulation model. The one-dimensional results imply that low eddy kinetic energy is caused by low conversions from the zonal mean kinetic energy. The two-dimensional results confirm that low wave number spectral coefficients approach the predictability limit slower than high wave number coefficients and suggest ways of estimating the rate of approach to the predictability limit.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 329-333
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