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  • Other Sources  (1,752)
  • LUNAR AND PLANETARY EXPLORATION  (668)
  • GEOPHYSICS  (467)
  • AERODYNAMICS  (342)
  • METEOROLOGY AND CLIMATOLOGY  (275)
  • 1980-1984  (1,752)
  • 1925-1929
  • 1980  (1,752)
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  • Other Sources  (1,752)
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  • 1980-1984  (1,752)
  • 1925-1929
Year
  • 1
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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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  • 2
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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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  • 3
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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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  • 4
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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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  • 5
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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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  • 6
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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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  • 7
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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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  • 8
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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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  • 9
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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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  • 10
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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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  • 11
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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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  • 12
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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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  • 13
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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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  • 14
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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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  • 15
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    Clear air turbulence: Historical comments (1980)
    In:  CASI
    Details
    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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  • 16
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    Aircraft icing instrumentation: Unfilled needs (1980)
    In:  CASI
    Details
    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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  • 17
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    Icing instrumentation (1980)
    In:  CASI
    Details
    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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  • 18
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    Turbulence: From a pilot's viewpoint (1980)
    In:  CASI
    Details
    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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  • 19
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    Federal Aviation Administration and National Weather Service Aviation Research and Development (1980)
    In:  CASI
    Details
    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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  • 20
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    Aviation meteorology research and development: A status report (1980)
    In:  CASI
    Details
    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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  • 21
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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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  • 22
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    First Scientific Working Group Meeting of Airborne Doppler Lidar Wind Velocity Measurement Program, appendix J (1980)
    In:  CASI
    Details
    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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  • 23
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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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  • 24
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    Cooperative convective precipitation experiment (1980)
    In:  CASI
    Details
    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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  • 25
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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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  • 26
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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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  • 27
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    Report of convective phenomena team (1980)
    In:  CASI
    Details
    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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  • 28
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    The MSFC Doppler lidar system, appendix B (1980)
    In:  CASI
    Details
    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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  • 29
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    Possible applications of MSFC Doppler lidar system, appendix C (1980)
    In:  CASI
    Details
    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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  • 30
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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
    Details
    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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  • 31
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    Application of the Doppler lidar system to agricultural burning and air-sea interactions (1980)
    In:  CASI
    Details
    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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  • 32
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    Measurement of phenomena associated with water clouds using Doppler lidar (1980)
    In:  CASI
    Details
    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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  • 33
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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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  • 34
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    Potential scientific research which will benefit from an airborne Doppler lidar measurement system (1980)
    In:  CASI
    Details
    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
    Details
    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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  • 36
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    Airborne Doppler lidar wind measuring system: Application to atmospheric problems (1980)
    In:  CASI
    Details
    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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  • 37
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    Statistical Analysis of daily mean temperatures (1980)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Data of daily mean temperatures recorded at the Kennedy Center during the period of 1957-1977 were analyzed to forecast daily mean temperatures and their thirty-day moving averages for a period of ten to fifteen days in a given month. Since it is found that the standard deviation is linear in the mean, a logarithmic transformation of the data is used for finding an integrated moving average process IMA by the Box-Jenkins aproach. The first differences of the transformed data seem to fit a moving average model with parameter value 2, MA(2). The consideration of seasonality factor makes the fit worse.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: The 1981 NASA(ASEE Summer Fac. Fellowship Program; 13 p
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  • 38
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    Satellite mission analysis (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 217-218
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  • 39
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    Modeling studies related to stratospheric measurements and data analysis (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 215-216
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  • 40
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    Data survey and evaluation (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 214
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  • 41
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    UARS definition study (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 209
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  • 42
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    Upper Atmosphere Research Satellites (UARS) working group and definition study (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 210
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  • 43
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    National Academy sensitivity studies (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 207
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  • 44
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    Ozone data processing and analysis (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmopshere Res. Program; p 203-204
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  • 45
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    ATMOS Spacelab science investigation (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmopshere Res. Program; p 201-202
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  • 46
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    Empirical stratospheric models (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 199-200
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  • 47
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    Rocket ozone data in support of Nimbus-7 and SAGE (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 196-197
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  • 48
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    Effects of solar variability on terrestrial upper atmosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmopshere Res. Program; p 188
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  • 49
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    Analysis of GASP carbon monoxide data (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 189-190
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  • 50
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    Analysis of GASP ozone data (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 186-187
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  • 51
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    Evaluate atmospheric trace gas and particle data obtained from B-747 commerical airliners (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 185
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  • 52
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    Satellite Ozone Analysis (SOAC/DMSP) (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 191-192
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  • 53
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    A study of the relationship between solar activity and terrestrial ozone fluctuations (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program p179-180 (SEE N85-73711 19-46)
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  • 54
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    Studies of equatorial stratospheric ozone (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 178
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  • 55
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    Study of the observed and theoretical distribution of atmospheric ozone (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 176-177
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  • 56
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    Ozone data analysis and interpretation (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program (SEE N85-73711 19-46)
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  • 57
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    Refinement of 2-D stratospheric model for aerosol dispersion (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 171
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  • 58
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    Computational investigation of reactive molecules (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 172
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  • 59
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    Stratospheric aerosol model (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 170
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  • 60
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    Stratospheric and mesospheric dynamics (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: Upper Atmosphere Res. Program; p 167-168
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  • 61
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    Transport of trace constituents in the stratosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 169
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  • 62
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    Stratospheric dynamics (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 166
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  • 63
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    Support of university stratospheric research (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 165
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  • 64
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    Methane and stratospheric water (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 156-157
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  • 65
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    Analysis of atmospheric reaction schemes (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 160
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  • 66
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    Theoretical studies: Radiation, clouds, transport (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA, Washington Upper Atmosphere Res. Program; p 161-162
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  • 67
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    Upper atmosphere theoretical studies (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 154-155
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  • 68
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    A program of stratospheric research (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 150-151
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  • 69
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    Theoretical studies of the atmosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 152-153
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  • 70
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    Molecular properties of stratospheric constituents (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 122
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  • 71
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    A possible new atmospheric OH source (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 120-121
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  • 72
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    Photochemical and kinetic measurements of atmospheric constituents vis-a-vis their role in controlling stratospheric ozone (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 113-115
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  • 73
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    Ionic processes in the upper atmosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 107
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  • 74
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    Reaction rate measurements (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 103-104
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  • 75
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    Homogeneous and heterogeneous rate constants of atmospheric interest (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 105-106
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  • 76
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    Laboratory kinetic studies of atmospheric reactions (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 100-102
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  • 77
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    An investigation of several reactions of importance in defining stratospheric halogen chemistry (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 98-99
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  • 78
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    Kinetics of stratospheric reactions (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 96-97
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  • 79
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    Stratospheric dynamics: Observational studies (1980)
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 69-70
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  • 80
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    Direct measurements of photolysis rates of stratospheric constituents (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 21-22
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  • 81
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    Saturn - Origin and composition of its inner moons and rings (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Theoretical modelling of the contraction of the primitive protosaturnian cloud, using ideas of supersonic turbulent convection, suggests that each of Saturn's inner moons, excepting Rhea, condensed above the ice-point of water and consists primarily of hydrous magnesium silicates. It is predicted that Voyager 1 may find that the satellite mean densities steadily increase towards the planet and that the rocky moons are irregular in shape.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Physics Letters; 80A; Nov. 24
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  • 82
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    Gravity anomalies on Venus (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Doppler radio tracking of the Pioneer Venus orbiter has provided gravity measures over a significant portion of Venus. Feature resolution is approximately 300-1000 km within an area extending from 10 deg S to 40 deg N latitude and from 70 deg W to 130 deg E longitude (approximately equal to 200 deg). Many anomalies were detected, and there is considerable correlation with radar altimetry topography (Pettengill et al., 1980). The amplitudes of the anomalies are relatively mild and similar to those on earth at this resolution. Calculations for isostatic adjustment reveal that significant compensation has occurred.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 85; Dec. 198
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  • 83
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    Distribution and source of the UV absorption in Venus' atmosphere (1980)
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    Publication Date: 2011-08-18
    Description: The model predictions were compared with the Pioneer Venus probes and orbiter to determine the composition of the UV absorbing materials. The simulations were carried out with radiative transfer codes which included spacecraft constraints on the aerosol and gas characteristics in the Venus atmosphere; gaseous SO2 (a source of opacity at the wavelengths below 0.32 microns), and a second absorber (which dominates above 0.32 microns) were required. The UV contrast variations are due to the optical depth changes in the upper haze layer producing brightness variations between equatorial and polar areas, and to differences in the depth over which the second UV absorber is depleted in the highest portion of the main clouds.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 85; Dec. 30
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  • 84
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    Measurements of thermal structure and thermal contrasts in the atmosphere of Venus and related dynamical observations - Results from the four Pioneer Venus probes (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: The thermal structure of the Venus atmosphere and differences in structure with latitude (up to 60 deg) and clock hour (from midnight to 8 AM) have been measured in situ from a height of 126 km to the surface by instruments on the four Pioneer Venus entry probes. It is found that thermal contrasts below 45 km are a few K, with the midlatitudes warmer than both equatorial and high latitudes. Considerable temperature and pressure differences with latitude develop in the clouds (25 K and 20 mbar level). In addition, upward of 110 km, there is evidence of large-amplitude temperature oscillations with altitude, believed to signify the presence of large-amplitude waves, perhaps thermal tides. Agreement of structure data from other Pioneer Venus experiments is generally excellent.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 85; Dec. 30
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  • 85
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    Observations of waves artificially stimulated by an electron beam inside a region with auroral precipitation (1980)
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    Publication Date: 2011-08-18
    Description: Observations of waves stimulated by artificial injection inside an auroral arc by an electron accelerator mounted on the POLAR 5 sounding rocket are presented. The accelerator produced a pulsed electron beam with currents up to 130 mA and energies up to 10 keV; emissions after the end of beam injection were generated by perturbations in the ambient plasma near the accelerator during beam injection. These emissions were independent of the electron beam direction along the geomagnetic field. The high frequency emission observed after beam injection correlated with the passage through an auroral arc; the low frequency emissions after beam injection were concentrated in two bands below the lower hybrid frequency.
    Keywords: GEOPHYSICS
    Type: Planetary and Space Science; 28; Dec. 198
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  • 86
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    Dust in Jupiter's magnetosphere. I - Physical processes. II - Origin of the ring. III - Time variations. IV - Effect on magnetospheric electrons and ions (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: The physical processes acting on charged microscopic dust grains in the Jovian atmosphere involve electromagnetic forces which dominate dust particle dynamics and diffusion across field lines resulting from random charge fluctuations of the dust grains. A model of the Jovian ring hypothesizes that the 'visible' ring particles are produced by erosive collisions between an assumed population of kilometer-sized parent bodies and submicron-sized magnetospheric dust particles. Fluctuations in the ring topology and intensity are determined over various time scales, showing that the ring is a quasipermanent and quasistable characteristic of the Jovian system. Finally, the interaction of the Jovian energetic belt electrons and the Jovian plasma with an ambient dust population is examined; the distribution of dust ejected from Io in the inner magnetosphere and losses of magnetospheric ions and electrons due to direct collisions with charged dust particles are calculated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Planetary and Space Science; 28; Dec. 198
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  • 87
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    Climate sensitivity from fluctuation dissipation - Some simple model tests (1980)
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    Publication Date: 2011-08-18
    Description: Leith has suggested that climatic response to change in external forcing parameters of the climate system may be estimated via the fluctuation-dissipation theorem (FDT). The method, which uses the natural fluctuations of the atmosphere to probe its dynamics, is tested here using a twenty-variable truncation model of the barotropic vorticity equation. Dissipative terms are added to the equations, so that the model is pushed away from the region where it is expected to satisfy the FDT. It is found that, even though the FDT is no longer satisfied in every detail, the FDT continues to provide an excellent estimate of the climatic sensitivity of the model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 37; Aug. 198
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  • 88
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    Three-layer interactive method for computing supersonic laminar separated flows (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: An interactive model for numerical computation of complicated two-dimensional flowfields including regions of reversed flow is proposed. The present approach is one of dividing the flowfield into three regions, in each of which a simplified mathematical model is applied: (1) outer, supersonic flow for which the full potential equation (hyperbolic) is used; (2) viscous, laminar layer in which the compressible boundary-layer model (parabolic) is used; and (3) recirculating flow modeled by the incompressible Navier-Stokes equations (elliptic). For matching of the numerical solutions in the three layers, two interaction models are developed: one for pressure interaction, the other for interaction between the shear layer and the recirculating flow. The uniform solution for the whole flowfield is then obtained by iteration of the local solutions under the constraints imposed by matching. The three-layer interactive model is used for solution of the flowfield past an asymmetric cavity. The method is shown to be capable of dealing with backflow without encountering problems at separation, characteristic to the boundary-layer approach.
    Keywords: AERODYNAMICS
    Type: AIAA Journal; 18; Nov. 198
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  • 89
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    Io control of Jovian radio emission (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: The possibility of Io controlling Jovian decametric radio emission, particularly in the region below 22 MHz, is discussed. Results of a two-year survey at 26.3 at 26.3 MHz are presented which demonstrate the control of Io over a high-intensity storm component of the radio emission and the independence of a weak radio component from the phase of Io, as was observed at lower frequencies. It is thus hypothesized that Io control is a flux-dependent rather than a frequency-dependent phenomenon, and results of analyses at 18 and 10 MHz which support this hypothesis are presented. The apparent correlation between frequency and Io control is thus shown to result from a selection effect due to the increase of non-Io emission with decreasing frequency and relative antenna detection threshold. This result implies a contiguous Io-controlled source region extending out several Jovian radii along the Io flux tube.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature; 287; Oct. 30
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  • 90
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    Time-average fluxes of heavy ions at the geostationary orbit (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Measurements of average proton, helium, carbon, and oxygen fluxes at 6.6 earth radii are reported. The data represent averages obtained on ATS 6 between June 15 and Oct. 3, 1974. The energy range covered was 0.36-1.1 MeV for protons and approximately 1-4 MeV for the heavier ions. The results indicate that above about 1 MeV the heavier ion fluxes dominate over the proton flux on the energy/ion scale. Using two different spectral dependencies to fit the data, the carbon to oxygen concentration ratio for energies above 1 MeV was found to be 0.43 for the power law spectrum and 0.44 for the exponential spectrum. Thus in either case the abundance ratio is consistent with the solar origin of the particles. Similarly, the helium to oxygen concentration ratio is found to be 0.17 for the power law spectrum and 0.28 for the exponential spectrum. This is inconsistent with the solar wind ratio, which is about 10. The results quoted above are based on a very small portion of the distribution function above 1 MeV.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; Oct. 1
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  • 91
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    Viscous flow and crystallization behavior of tektite glasses (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: The variation of viscosity with temperature was determined in the 200-2000 K range for a Muong Nong tektite material. The viscosity at the liquidus temperature of 1320 C is 20,000 P; treatments between 900 and 1300 C do not result in significant crystallization in the natural sample except when the sample is heated in contact with a synthetic tektite composition. Two synthetic microtektite with lower SiO2 contents than the Muong Nong material were also examined; heat flow calculations were performed for 2.5 to 10 cm spheres of tektite when cooling by radiation.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 85; Oct. 10
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  • 92
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    Improvements to satellite retrieval systems. The operational perspective (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Operational weather satellites are built as a series of nearly identical instruments which are flown for 5 to 7 years. Minor improvements are made during the life of the series. However, major improvements and changes in design are made with the initiation of a new series of instruments. Similarly, procedures used to process the data are characterized by frequent changes early in the life of a satellite series as user experience is gained with the new instrument. Later the changes become less frequent, both because the processing system becomes well tuned to that particular set of instruments and because, at the end of a series, resources are devoted to generating the processing system for the next set of instruments. Past and present systems are considered with emphasis on the vertical temperature profile radiometer and a procedure for deriving clear radiances in partly cloudy areas.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center VAS Demonstration Sounding Workshop; p 11-18
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  • 93
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    The occurrence rate, polarization character, and intensity of broadband Jovian kilometric radiation (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The paper describes the major observational features of one new component of Jupiter's radio emission spectrum, the broadband kilometer wavelength radiation, or bKOM. This study, using the Voyager Planetary Radio Astronomy (PRA) experiments, reveals that the overall occurrence morphology, dynamic spectra, and polarization character of bKOM are strong functions of the latitude and/or local time geometry of the observations. The postencounter data show a decline in the mean occurrence rates and power level of bKOM and, in particular, a depletion in the occurrence rate at those same longitudes where the detection rate is a maximum before encounter. Additionally, the polarization sense undergoes a permanent reversal in sign after encounter, whereas the time-averaged wave axial ratio and degree of polarization remain relatively unchanged. Finally, no evidence of any control by Io is found. The strong dependence of the morphology on local time suggests a source whose beam is nearly fixed relative to the Jupiter-sun line
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 85; Aug. 1
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  • 94
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    The case against UV photostimulated oxidation of magnetite (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The kinetics of magnetite oxidation in O2-bearing atmospheres in the presence of electromagnetic radiation was studied. No perceptible oxidation of magnetite by ultraviolet (UV) photostimulation occurred. These results do not corroborate previous conclusions by Huguenin (1973, 1974) as to the occurrence of this process. Therefore, although the possibility that the process actually occurs cannot be ruled out, it is concluded that there is not yet a basis in laboratory experiments for inferring that UV photostimulated oxidation of magnetite occurs naturally on the surface of Mars.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geophysical Research Letters; 7; Aug. 198
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  • 95
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    Rocket observations of the vertical distribution of ozone in the polar night and during a mid-winter stratospheric warming (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Rocket ozone soundings have been conducted in the stratosphere and lower mesosphere at high latitudes during winter. The collection of soundings show a high degree of variability when compared to ozone distributions measured during summer and at lower latitudes. The concurrently observed temperature and winds also show large variations which can be qualitatively related to the ozone profiles. Two most unusual ozone profiles were observed in January 1979 over Alaska during a stratospheric warming event. Both ozone profiles were consistent in showing the measured mixing ratios to be higher at 50 km than those measured at 40 km, a feature never reported before. This feature is related to the concurrently observed wind and temperature distributions and the NMC analyses of pressure height fields. The polar night ozone observations in the upper stratosphere and lower mesosphere suggest some temperature dependence, but transports seem to play an important role.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 7; Aug. 198
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  • 96
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    The behavior of ozone near the stratopause from two years of BUC observations (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Two years of Nimbus 4 backscattered ultraviolet data have been recalibrated and reprocessed. A Laplace transform inversion was applied to radiances at 2876 A and below for 560,000 individual scans for the period April 1970-May 1972. The behavior of ozone near 50 km as a function of time, latitude, and longitude is presented. The high-latitude 1-mbar ozone mixing ratio is maximum at the winter solstice, about 10 microgram/g and is minimum at the summer solstice, about 4 microgram/g. Below 30 deg latitude the ozone is fairly constant at 4 microgram/g. Ozone variability is large in winter and spring and small in summer and fall.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; Aug. 20
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  • 97
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    Voyager detection of nonthermal radio emission from Saturn (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The planetary radio astronomy experiment on board the Voyager spacecraft has detected bursts of nonthermal radio noise from Saturn occurring near 200 kilohertz, with a peak flux density comparable to higher frequency Jovian emissions. The radiation is right-hand polarized and is most likely emitted in the extraordinary magnetoionic mode from Saturn's northern hemisphere. Modulation that is consistent with a planetary rotation period of 10 hours 39.9 minutes is apparent in the data.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science; 209; Sept. 12
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  • 98
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    Midlatitude measurements of the ionospheric electric field during the ALADDIN programme (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Three measurements of ionospheric electric field were made during the 24-h ALADDIN rocket program at Wallops Island on June 29-30, 1974. The first of these used a double probe instrument, flown at 1500 Local Solar Time, and the second and third measurements were made by barium cloud releases at evening and morning twilight. These three electric field vectors have been compared with the predictions of a number of models of electric field due to the dynamo effects of various atmospheric tides, and also of a possible magnetospheric origin. On the assumption that the measurements were made at a location equatorward of the afternoon convergence and poleward of the morning divergence in the electric field patterns related to the Sq current system, Stening's (1973) model of the diurnal variation of the electric field induced by the (1, -2) tidal model at the time of the summer solstice correctly predicts the directions of the observed electric field. Forbes and Lindzen's (1976, 1977) model, incorporating the three major propagating tidal modes as well as the evanescent (1, -2) mode, also bears an acceptable relationship to the ALADDIN electric field directions. The ALADDIN E-field magnitudes are comparable with those obtained by ground-based observations from Millstone Hill and from Saint Santin but are about half of Stening's model values, and three times those of Forbes and Lindzen. Saint Santin E-field directions, at the same latitude but 75 deg difference in longitude, are distinctly different from ALADDIN, implying that longitudinal differences are significant.
    Keywords: GEOPHYSICS
    Type: Journal of Atmospheric and Terrestrial Physics; 42; June 198
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  • 99
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    Supernovae effects on the terrestrial atmosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The first effects of a nearby (10 parsec) supernova on the earth's atmosphere will be caused by ultraviolet radiation dissociating molecular oxygen. The event will be of about one month's duration. Several months later nuclear gamma radiation may arrive, causing a decrease in atmospheric ozone. Cosmic radiation from the supernova remnant will not intercept the earth for at least 1000 years at which time ozone will be seriously depleted. Supernova ultraviolet radiation increases column ozone and atomic oxygen. Atmospheric thermal structure is modified with a large temperature increase in the mesosphere and lower thermosphere and a decrease at higher altitudes caused by enhanced heat loss due to atomic oxygen radiation and conduction.
    Keywords: GEOPHYSICS
    Type: Planetary and Space Science; 28; June 198
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  • 100
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    Energetics and thermal structure of the middle atmosphere (1980)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: A study of a large number of temperature measurements in the middle atmosphere shows a much more complex thermal structure of this region than described in the U.S. Standard Atmosphere, 1976. The mesopause height which is generally assumed to be at 80 km varies between 70 and 100 km, often with two minima in temperature at about 70 and 100 km and a maximum between 80-85 km. By solving the energy balance equation and the equations of continuity, the physical significance of the observed thermal structure is discussed in terms of the energetics of the various regions of the middle atmosphere. It is show that the solar UV radiation plays a major role only in the energy budget of the stratosphere and the lower thermosphere. The energetics of the mesosphere is primarily influenced by the dissipation of eddy energy. The temperature in the region is a good indicator of the eddy diffusivity and can be used in deriving the eddy diffusion coefficient.
    Keywords: GEOPHYSICS
    Type: Planetary and Space Science; 28; June 198
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