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  • Inorganic Chemistry  (1,075)
  • LUNAR AND PLANETARY EXPLORATION  (723)
  • METEOROLOGY AND CLIMATOLOGY  (256)
  • Deutschland
  • 1975-1979  (1,791)
  • 1950-1954  (264)
  • 1977  (1,791)
  • 1951  (264)
Collection
Keywords
Publisher
Years
  • 1975-1979  (1,791)
  • 1950-1954  (264)
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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    A summary of monthly mean simulation experiments with the GISS model (1977)
    In:  CASI
    Details
    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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  • 3
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    Sampling analysis for the earth radiation budget satellite system mission (1977)
    In:  CASI
    Details
    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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  • 4
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    A simple algorithm for inferring the vertical ozone profile from satellite measurements (1977)
    In:  CASI
    Details
    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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  • 5
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    A statistical method for time-continuous assimilation of remote sounding temperatures (1977)
    In:  CASI
    Details
    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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  • 6
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    Profiling of atmospheric water vapor with microwave radiometry (1977)
    In:  CASI
    Details
    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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  • 7
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    The evaluation by numerical simulation of the design for a Microwave Pressure Sounder (MPS) (1977)
    In:  CASI
    Details
    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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  • 8
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    Cloud temperatures and prediction of hurricane intensity (1977)
    In:  CASI
    Details
    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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  • 9
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    A real-time subsynoptic, meso, and microscale severe storm forecast system (1977)
    In:  CASI
    Details
    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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  • 10
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    Detection of severe storms through a tropospheric-ionospheric coupling mechanism (1977)
    In:  CASI
    Details
    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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  • 11
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    Three dimensional cloud top changes related to thunderstorm severity (1977)
    In:  CASI
    Details
    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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  • 12
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    Climatological features revealed by ESMR derived oceanic rainfall maps (1977)
    In:  CASI
    Details
    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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  • 13
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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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  • 14
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    Operation Aurorozone: An experiment in sun/weather (1977)
    In:  CASI
    Details
    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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  • 15
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    Design and testing of a new planetary boundary layer parameterization (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    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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  • 16
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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
    Details
    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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  • 17
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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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  • 18
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    Wind speed and aerosol optical thickness estimates from aircraft observations of sea flitter (1977)
    In:  CASI
    Details
    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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  • 19
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    Objective tropical cyclone analysis and forecasting technique using conventional and Nimbus-5 electrically scanning microwave radiometer measurements (1977)
    In:  CASI
    Details
    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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  • 20
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    Latent heat calculations and their relationship to tropical cyclone intensity (1977)
    In:  CASI
    Details
    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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  • 21
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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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  • 22
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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
    Details
    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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  • 23
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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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  • 24
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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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  • 25
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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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  • 26
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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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  • 27
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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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  • 28
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    Spectral energetics and predictability studies (1977)
    In:  CASI
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    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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  • 29
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    ERBSS scanner performance in the presence of radiation directional model errors (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Simulation studies of the ERBSS scanner were performed to determine the sensitivity of the inferred flux at the top of the atmosphere to radiation directional model errors for candidate scan plane orientations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 311-315
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  • 30
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    Commercial aircraft derived high resolution wind and temperature data from the tropics for FGGE: Implications for NASA (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Two programs involving over 100 commercial aircraft were initiated to provide global high resolution in-situ windfield and temperature data during the FGGE. The concepts developed for these programs could have important implications for both meteorology and aviation in the near term.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev; p 265-270
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  • 31
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    The data systems test-dress rehearsal for FGGE (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A series of Data Systems Tests conducted by NASA as a precursor to the First GARP Global Experiment is described. Included is a description of the global data sets acquired and the influence the tests had on the observing system, the data processing plans and research activities of the Global Experiment itself.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 259-263
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  • 32
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    An error analysis of tropical cyclone divergence and vorticity fields derived from satellite cloud winds on the Atmospheric and Oceanographic Information Processing System (AOIPS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: An advanced Man-Interactive image and data processing system (AOIPS) was developed to extract basic meteorological parameters from satellite data and to perform further analyses. The errors in the satellite derived cloud wind fields for tropical cyclones are investigated. The propagation of these errors through the AOIPS system and their effects on the analysis of horizontal divergence and relative vorticity are evaluated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 241-245
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  • 33
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    General solutions for the movement of storms (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Diagnostic solutions are presented for the displacement velocity of a storm vortex and the velocity of the centroid of the storm's convection.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 219-223
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  • 34
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    Molecular model of ice nucleation (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Two complementary techniques, semi-empirical quantum mechanical calculations and empirical central field pair potential calculations were used in developing a model of the interaction of water with simple surfaces.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 203-206
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  • 35
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    Fast but accurate techniques for calculating radiative terms in numerical atmospheric models and in remote sensing applications (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Methods were developed for calculating radiative terms with relatively high accuracy but with sufficient speed, so that they can be used in numerical atmospheric models or in high volume processing of satellite measured radiances for remote sensing of atmospheric and surface parameters. Comparison with commonly used methods in both types of applications indicate improvements in calculating transmittances of factors between two and three, and in calculating radiances and cooling rates of factors between two and seven.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 195-200
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  • 36
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    Mount Agung eruption provides test of a global climate perturbation (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The Mt. Agung volcanic eruption in 1963 is used as a test case to examine the climatic response to a global-scale radiative perturbation of the earth's atmosphere.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 165-169
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  • 37
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    On the interannual variability of the ocean atmospheric system (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Several feedback mechanisms between ocean and atmosphere are discussed, which seem to have a decisive influence on the interannual variability of the atmosphere, and on climatic fluctuations of a time scale of 10 to 50 years. Satellite requirements to monitor these feedback processes are outlined briefly.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 141-146
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  • 38
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    Nimbus 6 ERB scanner studies for development of Earth Radiation Budget Satellite System (ERBSS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The Nimbus 6 ERB scanner data were conducted to support the development of the Earth Radiation Budget Satellite System project. The ERB data were processed in terms of Earth targets and angular bins and used to evaluate currently available directional radiation models for the longwave and shortwave spectral ranges. Results indicate that available longwave models are adequate for the most part while available shortwave models are inadequate. An effort was initiated to develop improved shortwave models for various cloud conditions and various surface types for cloud free conditions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 147-151
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    Advances in the remote sensing of atmospheric temperature profiles (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Clear-column temperature profiles with a vertical resolution of 2 km in the troposphere and an accuracy of 1.5 K are obtained in the presence of multiple layers of broken clouds using narrow band-pass measurements carefully selected in the 4.18 and 15 micron regions of the CO2 bands.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 87-91
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    Advances in local area, mesoscale modeling (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A two-layer, mesoscale boundary layer model is being developed and validated against San Francisco Bay Area observational data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 55-59
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    Remote sensing of hurricane waves (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A program was undertaken to obtain data on wind generated ocean waves in hurricanes by remote sensing techniques. The sensor, a synthetic aperture radar, has collected the first data ever on the directional wave climate throughout a hurricane. This information was found to have inconsistencies with present hurricane wave generation models.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 51-53
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    Observations of the microclimate of a lake under cold air advective conditions (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The moderating effects of Lake Apopka, Florida, on downwind surface temperatures were evaluated under cold air advective conditions. Point temperature measurements north and south of the lake and data obtained from the NOAA satellite and a thermal scanner flown at 1.6 km, indicate that, under conditions of moderate winds (approximately 4m/sec), surface temperatures directly downwind may be higher than surrounding surface temperatures by as much as 5 C. With surface wind speed less than 1m/sec, no substantial temperature effects were observed. Results of this study are being used in land use planning, lake level control and in agriculture for selecting planting sites.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 61-65
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    Mesoanalysis of record Chicago rainstorm using radar, satellite, and rain-gage data (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Comparison of cloud-top topography and rainfall rates at the surface revealed that the areas of heavy rain are located where there are depressions at the anvil top. It was also found that the Z-R relationships show a large scatter when vertical and/or horizontal air currents are strong. Results of this research led to Project NIMROD proposed to begin in May 1978.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 17-21
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    Dry air entrainment into convective clouds (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A systematic approach to the study of atmospheric turbulent motion is discussed in terms of weather modification. The background of cloud physics, and the mixing process are described. A zero-g study is proposed to enable the basic experimental data to be collected so that theory may be developed to generalize results for practical applications.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 1-6
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    Geophysical fluid flow model experiments in spherical geometry (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: An experimental and theoretical program was undertaken to assist in the design of geophysical fluid flow model experiments for Spacelab. Two new nonintrusive measurement techniques were developed. A theoretical calculation was carried out to guide the design of a proposed atmospheric general circulation model experiment.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 177-181
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    Cloud cover modeling (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Results from two investigations in modeling cloud cover are presented. These are a univariate model and a multivariate model for cloud cover.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 317-321
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    Deconvolution of Earth radiation budget data (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The theory of deconvolution of wide field of view Earth radiation measurements is applied to Nimbus 6 ERB data. Results with a 15 deg resolution are presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 299-303
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    Electrochemical concentration cell ozonesonde performance evaluation (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A large number of electrochemical concentration cell (EDD) ozonesondes were calibrated relative to ultraviolet photometric absorption (254 nm) to determine their precision and accuracy. The average agreement with UV photometry was found to be good, but with considerable variation from one ECC ozonesonde to another. Applying individual calibrations to vertical ozone profiles reduced the systematic differences between ECC ozonesonde total ozone values and Dobson spectrophotometric determinations of the same quantity, but did not improve random differences.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 295-297
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    Microwave radiometric measurements of sea-surface parameters (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A technique to remotely measure sea-surface temperature and salinity (for concentrations greater than 5 parts-per-thousand) with accuracies of 1 C and 1 part-per-thousand, respectively, was demonstrated with a two-frequency microwave radiometer system.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 277-281
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    High resolution tropical cyclone wind fields determined from cloud motions (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Full resolution rapid scan infrared and visible images from the VISSR sensor on board SMS-2/GEOS-1 satellite have made it possible to maximize the number of tropical cyclone upper and lower tropospheric wind vectors by a factor of 6(2) over that of the images taken at 30 minute (15 minute) intervals. These full resolution rapid scan visible images have also made it possible to derive low level winds near the center of tropical cyclones.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 253-257
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    Mechanisms of thunderstorm related to motion and severity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A research program was conducted to better understand the relation of vertical shear of the horizontal wind in the environment and of momentum exchange to thunderstorm motion and intensity.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 213-217
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    Atmospheric Variability Experiments (AVE) and mesoscale structure (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Information is presented on accuracy and resolution of AVE data sets.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 207-211
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    Preliminary test of a coarse resolution GCM for climate application (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Preliminary steps were taken to develop a climate model adequate for seasonal and interannual simulations. Tests of the model against the observed seasonal cycle of key climate properties indicate an encouraging capability for climate applications.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 183-187
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    An investigation of surface albedo variations during the recent Sahel drought (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Applications Technology Satellite 3 data are used to measure surface albedoes in the African Sahel during the 1967 to 1974 drought.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 171-175
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    Stratospheric aerosols and climatic change (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The effect of stratospheric aerosols on climate is considered using an aerosol model and a radiative convective 1-D climate model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 159-163
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    The mass of Phobos (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Radio tracking data associated with the February 1977 encounters between the Martian satellite Phobos and the Viking Orbiter I spacecraft have been analyzed to determine the gravitational constant of Phobos. A linear error analysis was conducted to determine the selection of data and the parameter solution set which would yield the best estimate of the gravitational constant. This error analysis indicated that the optimal data set was a data arc beginning just prior to the closest encounter and spanning three consecutive spacecraft orbits; data near periapsis were deleted. The most feasible parameter solution set consisted of the Phobos gravitational constant and the spacecraft initial conditions. The result of the data analysis was an estimate of (7.3 plus or minus 0.7) x 10 to the -4th cu km/sq sec for the gravitational constant of Phobos.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geophysical Research Letters; 4; Dec. 197
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    Path- and area-integrated rainfall measurement by microwave attenuation in the 1-3 cm band (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: At a wavelength of about 0.9 cm, microwave attenuation is demonstrated to be linearly related to rainfall rate and independent of drop size distribution and temperature. In addition, practical methods for measuring path- and area-averaged rainfall rate are reviewed. A compromise between maximum path-averaged rainfall rate sensitivity and minimum sensing errors may be achieved by the use of one-way methods between the transmitter and the receiver, with a wavelength of 1.5 to 2.0 cm. Corrections for nonspherical drops and for multiple scattering are also discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 16; Dec. 197
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    Temporal variations in atmospheric water vapor and aerosol optical depth determined by remote sensing (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: By automatically tracking the sun, a four-channel solar radiometer was used to continuously measure optical depth and atmospheric water vapor. The design of this simple autotracking solar radiometer is presented. A technique for calculating the precipitable water from the ratio of a water band to a nearby nonabsorbing band is discussed. Studies of the temporal variability of precipitable water and atmospheric optical depth at 0.610, 0.8730 and 1.04 microns are presented. There was good correlation between the optical depth measured using the autotracker and visibility determined from National Weather Service Station data. However, much more temporal structure was evident in the autotracker data than in the visibility data. Cirrus clouds caused large changes in optical depth over short time periods. They appear to be the largest deleterious atmospheric effect over agricultural areas that are remote from urban pollution sources.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 16; Dec. 197
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    Spectrophotometric and color estimates of the Viking lander sites (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The spectral radiance and color of the Martian sky and soil and the spectral reflectance of soil features are estimated from six-channel (0.4-1.0 micron) spectral data obtained with the Viking lander cameras. Images taken near local noon from the two landers reveal a sky that is brighter near the horizon than the soil but with a similar spectral radiance shape and color. The scenes are predominantly moderate yellowish brown in color with only subtle variations except for some dark grey rocks. Most spectral reflectance estimates are similar: they rise rapidly with increasing wavelength between 0.4 and 0.8 micron and with only a few exceptions exhibit a pronounced minimum centered about 0.93 micron. These characteristics are consistent with an abundance of Fe(3+)-rich weathering products, notably nontronite. However, the delineation of the number and abundances of total mineral phases requires further analyses and laboratory comparisons. Reflectance estimates for rocks have not been repeatable, probably because most rocks have irregular pitted surfaces that introduce significant shadowing components.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Sept. 30
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    A search for ultraviolet OH emission from meteors (1977)
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    Publication Date: 2011-08-17
    Description: Observations of hydroxyl (OH) emission from meteors were made during the late summers of 1975 and 1976 from altitudes of 10,600 and 14,200 feet (3.2 km and 4.45 km). The observations were made with OH meteor photometers developed at the NASA-Langley Research Center. Two of the meteors were Perseids, and one was an Alpha Capricornid. The Perseid meteors produced a peak irradiance at a distance of 100 km from the meteors of about 0.00005 erg/sq cm per sec in the OH emission region. The zero-magnitude Alpha Capricornid meteor produced a spectral irradiance at 3100 A of 23 hundred-millionths erg/sq cm per A per sec. This may be indicative of significant amounts of H2O in these meteors.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astrophysical Journal; vol. 217
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    Reducing greenhouses and the temperature history of earth and Mars (1977)
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    Publication Date: 2011-08-17
    Description: It has been suggested that NH3 and other reducing gases were present in the earth's primitive atmosphere, enhancing the global greenhouse effect; data obtained through isotopic archeothermometry support this hypothesis. Computations have been applied to the evolution of surface temperatures on Mars, considering various bolometric albedos and compositions. The results are of interest in the study of Martian sinuous channels which may have been created by aqueous fluvial errosion, and imply that clement conditions may have previously occurred on Mars, and may occur in the future.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature; 269; Sept. 15
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    A satellite technique for quantitatively mapping rainfall rates over the oceans (1977)
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    Publication Date: 2011-08-17
    Description: A theoretical model for calculating microwave radiative transfer in raining atmospheres is developed. These calculations are compared with microwave brightness temperatures at a wavelength of 1.55 cm measured by the Electrically Scanning Microwave Radiometer (ESMR) on the Nimbus-5 satellite and rain rates derived from WSR-57 meteorological radar measurements. A specially designed ground-based verification experiment was also performed, wherein upward-viewing microwave brightness temperature measurements at wavelengths of 1.55 and 0.81 cm were compared with directly measured rain rates. It is shown that, over ocean areas, brightness temperature measurements from ESMR may be interpreted in terms of rain rate with about an accuracy of a factor of 2 over the range 1 to 25 mm/hr rain rate.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 16; May 1977
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    Happy Canyon - A new type of enstatite achondrite (1977)
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    Publication Date: 2011-08-17
    Description: Mineralogical and chemical characteristics of the Happy Canyon meteorite, found in 1971 near Wayside, Texas, show it to be a new type of enstatite achondrite occupying the gap between the recrystallized enstatite chondrites and the igneous, crystalline, unbrecciated enstatite chondrites. Although the bulk composition of the specimen is consistent with that of an E6 enstatite chondrite, it has a crystal cumulate texture. There are minor amounts of metal and troilite which have survived extensive weathering. The Happy Canyon meteorite may represent an E6 composition which has melted and reprecipitated at a slightly higher oxidation state, possibly in the core of a small parent body.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Meteoritics; 12; June 30
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    The upper ionosphere of Titan (1977)
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    Publication Date: 2011-08-17
    Description: Photoionization of the upper atmosphere of Titan by sunlight is expected to produce a substantial ionospheric layer. One-dimensional forms of the mass, momentum, and energy conservation equations for ions and electrons have been solved along with electron number densities of about 1000/cu cm, using various model atmospheres. The significant ions in a CH4-H2 atmosphere are H(+), H3(+), CH5(+), CH3(+), and C2H5(+). Electron temperatures may be as high as 1000 K, depending on the abundance of hydrogen in the high atmosphere. Interaction of the solar wind with the ionosphere is also discussed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 31; May 1977
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    The rings of Uranus (1977)
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    Publication Date: 2011-08-17
    Description: A description is given of the observation of five brief occultations of the star SAO 158687 which occurred both before and after its occultation by Uranus on March 10, 1977. The events were observed with a three-channel occultation photometer, attached to a 91-cm telescope. The observations indicate that at least five rings encircle the planet Uranus. Possible reasons for the narrowness of the Uranus rings are discussed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature; 267; May 26
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    Observations at the planet Mercury by the plasma electron experiment - Mariner 10 (1977)
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    Publication Date: 2011-08-17
    Description: Two nightside encounters with Mercury's magnetosphere by Mariner 10 revealed bow shock and magnetosheath signatures in the plasma electron data that are entirely consistent with the geometry expected for an interaction between a planet-centered magnetic dipole and the solar wind. The geometrically determined distance between the planet's center and the solar wind stagnation point is 1.4 plus or minus 0.1 R sub M. Both diffuse and sharp shock crossings were observed on the two magnetosphere encounters.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; May 1
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    Clear air turbulence - Detection by infrared observations of water vapor (1977)
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    Publication Date: 2011-08-17
    Description: 'Forward-looking' infrared measurements of water vapor from the C-141A Kuiper Airborne Observatory of the National Aeronautics and Space Administration Ames Research Center show large, distinctly identifiable, signal anomalies from 4 to 10 minutes in advance of subsequent encounters with clear air turbulence (CAT). These anomalies are characteristically different from the signals not followed by CAT encounters. Results of airborne field trials in which the infrared radiometer was used indicate that, out of 51 situations, 80 percent were CAT alerts followed by CAT encounters, 12 percent were 'false alarms' (CAT alerts not followed by CAT encounters), and 8 percent were CAT encounters not preceded by an infrared signal anomaly or CAT alert.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Science; 196; June 3
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    NOAA-5 views dust storm (1977)
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    Publication Date: 2011-08-17
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 58
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    Minor planets and related objects. XXII - Phase functions for /6/ Hebe (1977)
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    Publication Date: 2011-08-17
    Description: Twenty-two light curves of Hebe are analyzed along with results of UBV photometry and photometric astrometry. A mean synodic period of approximately 7 hr 16 min 28.7 sec is adopted, and it is found that the amplitude of Hebe appears to vary directly with phase. The asteroid's magnitudes and colors are plotted against phase, its pole orientation is estimated, and the sidereal period is determined to be about 7 hr 16 min 28.01 sec from photometric astrometry. A color curve is plotted which shows that Hebe has a reddened region on its surface near the secondary minimum and that the asteroid is nearly spherical. Opposition effects are compared and found to be closely similar for Hebe, Ceres, Lydia, Massalia, and Vesta.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astronomical Journal; 82; Mar. 197
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    Towards a theory of stochastic vorticity-augmentation (1977)
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    Publication Date: 2011-08-17
    Description: A new hypothesis to account for the formation of tornadoes is presented. An elementary one-dimensional theory is formulated for vorticity transfer between an ambient sheared wind and a transverse penetrating jet. The theory points out the relevant quantities to be determined in describing the present stochastic mode of vorticity augmentation.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Nature; 266; Apr. 28
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    Updating prediction models by dynamical relaxation - An examination of the technique (1977)
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    Publication Date: 2011-08-17
    Description: A dynamical relaxation technique for updating prediction models is analyzed with the help of the linear and nonlinear barotropic primitive equations. It is assumed that a complete four-dimensional time history of some prescribed subset of the meteorological variables is known. The rate of adaptation of the flow variables toward the true state is determined for a linearized f-model, and for mid-latitude and equatorial beta-plane models. The results of the analysis are corroborated by numerical experiments with the nonlinear shallow-water equations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Royal Meteorological Society; vol. 103
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    The Del Rio ataxite, Texas (1977)
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    Publication Date: 2011-08-17
    Description: Basic data are presented on the Del Rio, Nordheim, and Monahans ataxites found in Texas. Results are reported for bulk-chemistry analysis, metallographic observations, and electron-microprobe analysis of the Del Rio meteorite. It is shown that Del Rio is distinctly different from the other two ataxites in terms of nickel, phosphorous, and carbon content, and is composed of at least three coarse grains in different crystallographic orientations. All the kamacite in Del Rio is found to have transformation structures that are probable shock products, and minor inclusions of daubreelite, schreibersite, and troilite are observed. It is concluded that Del Rio was apparently mildly shocked prior to its fall.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Meteoritics; 12; Mar. 31
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    The effect of pulse interval statistics on the spectrum of radiation from lightning (1977)
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    Publication Date: 2011-08-17
    Description: An analysis of atmospheric radio noise originally appearing in the literature to describe the VLF structure of atmospherics is repeated here, keeping a term discarded in the previous work and extending the results to include all frequencies and some simple effects of amplitude variations. It is shown that at high frequencies, atmospheric radiation appears to be the result of incoherent sources, whereas at low frequencies the sferics appear to originate from coherent sources. These conclusions are valid with only weak restrictions, regardless of the actual statistical model assumed for the process. An implication of these results is that at high frequencies the magnitude of the spectrum of the received signal can be related to the spectrum of the source current, a means for the study of lightning current wave forms thus possibly being provided.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Geophysical Research; 82; Apr. 20
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    NASA's atmospheric variability experiments /AVE/ (1977)
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    Publication Date: 2011-08-17
    Description: A series of seven mesoscale experiments were conducted under the NASA program, Atmospheric Variability Experiments (AVE). Rawinsonde, satellite, aircraft, and ground observations were recorded during specially selected meteorological periods lasting from 1 to 3 days. Details are presented for each AVE relative to observation times, experiment size and location, and significant weather. Some research results based on the use of these AVE data are referenced. These include contributions to regional numerical prediction; relations between wind shears, instability, and thunderstorm motion and development; relations between moisture and temperature and the probability of convection; retrieval of tropospheric temperature profiles from cloud-contaminated satellite data; variation of convection intensity as a result of atmospheric variability; and effects of cloud rotation on their trajectories.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 58
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  • 75
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    Wind enhanced planetary escape - Collisional modifications (1977)
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    Publication Date: 2011-08-17
    Description: Effects of collisions and finite winds characteristic of a highly perturbed atmosphere on the thermal escape of terrestrial hydrogen and helium are investigated using a Monte Carlo approach. The limiting cases of vertical and horizontal winds are considered, and the relaxation layer between the collisionless exosphere and the collision-dominated thermosphere is modeled as a plane-parallel slab of given column density, depth, and atmospheric density. For both gases, the upwardly injected flux at the base of the relaxation layer is compared with the returning downward flux distribution at the same location; the technique is also applied to the atmosphere of Titan. The results show that inclusion of collisions in the escape model for terrestrial hydrogen with winds effectively throttles the escape process, that collisional throttling is negligible for helium when the exobase temperature is at least 5000 K, and that the escape of a planetary-atmosphere constituent depends on the ratio of its gravitational and kinetic energies as well as on the ratio of its mass to that of the background gas.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Mar. 1
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  • 76
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    A low-frequency radio survey of the planets with RAE 2 (1977)
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    Publication Date: 2011-08-17
    Description: Over one thousand occultations of each planet in the solar system have occurred during the period from mid-1973 through mid-1976 as seen from the lunar orbiting Radio Astronomy Explorer 2 (RAE 2) spacecraft. These occultations have been examined for evidence of planetary radio emissions in the 0.025-13.1 MHz band. Only Jupiter and the earth have given positive results. Lack of detection of emission from the other planets can mean that either they do not emit radio noise in this band or the flux level of their emissions and/or its occurrence rate are too low to be detected by RAE 2.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 82; Mar. 1
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  • 77
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    Lunar soil - Iron and titanium bands in the glass fraction (1977)
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    Publication Date: 2011-08-17
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science; 195; Mar. 11
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  • 78
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    The July climate and a comparison of the January and July climates simulated by the GISS general circulation model (1977)
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    Publication Date: 2011-08-17
    Description: Results are presented for a study directed to evaluate the ability of the global general circulation model of the Goddard Institute for Space Studies (GISS) in simulating seasonal differences as related to an experiment simulating the July climatology which parallels the January simulation presented by Somerville et al. (1974). The July and January simulations are compared with each other and with climatological data on seasonal changes, mainly for the Northern Hemisphere troposphere. The comparison shows that the model-generated energy cycle, distribution of winds, temperature, humidity and pressure, dynamical transports, diabatic heating, evaporation, precipitation and cloud cover are all realistic for the Northern Hemisphere troposphere in July. The model's simulation of seasonal differences is generally quite realistic since the systematic quantitative errors do not affect the simulation of relative changes, to first order. Defects that could seriously bias the model's performance in particular climate experiments are identified and discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review; 105; Feb. 197
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  • 79
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    On the reality of the Venus winds (1977)
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    Publication Date: 2011-08-17
    Description: The article presents a rebuttal of Young's (1975) view that the 140 m/sec horizontal wind at 45 km reported by Venera 8 is anomalous or spurious. Some errors are discussed and the largest contribution is attributed to descent probe measurements designed to find the true probe descent rate. Young's suggestion of error in in situ measurement of winds due to selection of a reference speed and to unrecognized oscillator drift is scrutinized. Evidence is seen for a wide band of variable high-grade retrograde horizontal winds girdling Venus at the equator. Mariner 10 evidence (UV photographs) is taken into account. The band of winds at 45 km is seen to extend well beyond the top of the visible cloud, and an upper turbulent region is attributed to vertical convection currents carried along by high-speed horizontal winds.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 30; Feb. 197
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  • 80
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    Wind estimates from cloud motions - Results from Phases I, II and III of an in situ aircraft verification experiment (1977)
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    Publication Date: 2011-08-17
    Description: An experiment is in progress to verify geostationary-satellite-derived cloud-motion wind estimates by in-situ aircraft wind-velocity measurements. One or more low-level aircraft equipped with Inertial Navigation Systems (INS) were used to define the vertical extent and horizontal motion of a cloud and to measure the ambient wind field. A high-level aircraft, also equipped with an INS, took photographs to describe the horizontal extent of the cloud field and to measure cloud motion. To date the experiment has been conducted over tropical oceans and in the western Gulf of Mexico. A total of 60 h have been spent tracking some 40 tropical cumulus and five cirrus clouds. Results for tropical cumulus clouds indicate excellent agreement between the cloud motion and the wind at cloud base. The magnitude of the vector difference between the cloud motion and the cloud-base wind is less than 1.3 m/s for 67% of the cases with track lengths of 1 h or longer. Similarly, the vector differences between the cloud motion and the wind at sub-cloud (150 m), mid-cloud, and cloud-top levels are 1.5, 3.6 and 7.0 m/s, respectively. The cirrus cloud motions agreed best with the mean wind in the cloud layer with a vector difference of about 1.6 m/s.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 16; Aug. 197
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  • 81
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    Satellite-observed latent heat release in a tropical cyclone (1977)
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    Publication Date: 2011-08-17
    Description: The latent heat release (LHR) and the distribution of rainfall rate of a tropical cyclone as it grows from a tropical disturbance to a typhoon were determined from Nimbus 5 Electrically Scanning Microwave Radiometer data. The LHR (calculated over a circular area of 4 deg latitude radius) increased during the development and intensification of the storm from a magnitude of 2.7 x 10 to the fourteenth W (in the disturbance stage) to 8.8 x 10 to the fourteenth W (typhoon stage). The latter value corresponds to a mean rainfall rate of 2.0 mm/h. The more intense the cyclone and the greater the LHR, the greater the percentage contribution of the larger rainfall rates to the LHR. As a cyclone intensifies, the higher rainfall rates tend to concentrate toward the center of the circulation.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review; 105; Aug. 197
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  • 82
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    Martian isotopic ratios and upper limits for possible minor constituents as derived from Mariner 9 infrared spectrometer data (1977)
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    Publication Date: 2011-08-17
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 32; Sept
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  • 83
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    Impulsive penetration of filamentary plasma elements into the magnetospheres of the earth and Jupiter (1977)
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    Publication Date: 2011-08-17
    Description: Assuming that the solar wind plasma is usually nonuniform over distances of 10,000 km or less, it is shown that filamentary plasma elements stretched out from the sun can penetrate impulsively and become engulfed into the magnetosphere. The diamagnetic effects associated with these plasma inhomogeneities are observed in outer magnetospheres and magnetosheaths as dips or directional discontinuities in the magnetic field measurements. From the mean penetration distances of these diamagnetic plasma elements one can deduce a mean deceleration time, as well as an approximate value of the integrated Pedersen conductivity in the polar cusp of the earth and Jupiter.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Planetary and Space Science; 25; Sept
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  • 84
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    Distribution of molecular weight in glyceride polymerizates or aggregates of them after contact with lunar grains (1977)
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    Publication Date: 2011-08-17
    Description: An attempt is made to report on experiments in which a molecular-weight increase was determined in thin layers of triglyceride-containing glycerides after thin-layer contact for two years with lunar topsoil grains at 25 C without any thermal activation. It is noted that solidification was observed on both dielectric grains and metal-rich areas and that changes in viscosity and molecular weights were first detected by solidification of surface layers. Gel permeation chromatography is described which detected a general shift of the Gaussian distribution of the molecular-weight data toward generally higher molecular weights as well as an increase in mean molecular weight. Reaction mechanisms are considered, and results of spectrographic analysis are cited which support the interpretations of the molecular-weight data.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: The Moon; 16; May 1977
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  • 85
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    Possible Jovian methane emission at 76 GHz in coincidence with decameter activity (1977)
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    Publication Date: 2011-08-17
    Description: The tentative detection of a methane line in emission at 76.2 GHz in the atmosphere of Jupiter is reported. The observed feature is well-correlated with the presence and absence of Jovian decameter-emission activity on successive days. The present results may represent the first detection of extraterrestrial methane microwave emission.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astrophysical Journal; vol. 216
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  • 86
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    The clouds of Venus (1977)
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    Publication Date: 2011-08-17
    Description: The current state of knowledge of the Venusian clouds is reviewed. The visible clouds of Venus are shown to be quite similar to low level terrestrial hazes of strong anthropogenic influence. Possible nucleation and particle growth mechanisms are presented. The Pioneer Venus experiments that emphasize cloud measurements are described and their expected findings are discussed in detail. The results of these experiments should define the cloud particle composition, microphysics, thermal and radiative heat budget, rough dynamical features and horizontal and vertical variations in these and other parameters. This information should be sufficient to initialize cloud models which can be used to explain the cloud formation, decay, and particle life cycle.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; May 1977
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  • 87
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    The Pioneer Venus program (1977)
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    Publication Date: 2011-08-17
    Description: Mission timetables, spacecraft, scientific objectives, and payloads of the two mission, Orbiter and Multiprobe, planned for launch and encounter with Venus during the 1978 Venus mission opportunity are described. Basically, the Orbiter mission has the goal of global mapping of the clouds, atmosphere and ionosphere of Venus by remote sensing and radio occultation, global studies by in situ measurements of the upper atmosphere and ionosphere and solar wind-ionosphere interaction region, and determination of gravitational field harmonics from perturbations of the spacecraft orbit. The Multiprobe mission will study the nature and composition of the clouds, the structure of the atmosphere, the circulation pattern, and the characteristics of the planetary environmental interaction with the solar wind.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; May 1977
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  • 88
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    The exploration of Venus (1977)
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    Description: The paper outlines the evolution of the Pioneer Venus program from the initial meeting of a consortium of scientists to study the feasibility of a simple entry probe to Venus, through the Planetary Explorer missions, to the Orbiter Mission proposals. Major recommendations of the 1970 National Academy of Sciences study on Venus exploration planning and of the 1972 Pioneer Venus Science Steering Group report are mentioned.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; May 1977
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  • 89
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    Composition and structure of the atmosphere of Venus (1977)
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    Publication Date: 2011-08-17
    Description: Some of the main questions regarding the composition, structure, and origin of the atmosphere of Venus are posed. These questions are (1) the distribution of the constituents of the lower atmosphere, (2) cloud composition, (3) the planet's surface and interior as revealed by atmospheric data, (4) the state property profiles and their variation over the planet, (5) the reason for the high temperatures of the lower atmosphere, (6) composition and temperature profiles of the upper atmosphere and location of the homopause, (7) spatial and temporal variations in the upper atmosphere, (8) the cause of the stability of CO2 - global circulation or local turbulence, (9) influence of neutral composition on the thermal structure, (10) response of upper atmosphere to change in solar EUV and solar wind, (11) the source and destination of the atmosphere, and (12) the location of Venus's water. The main parameters to be measured which will aid in resolving these problems are enumerated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; May 1977
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  • 90
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    The surface and interior of Venus (1977)
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    Publication Date: 2011-08-17
    Description: The present knowledge of Venus is reviewed with discussions of the nature and history of both the surface, crust and interior. Instrumentation on board the Pioneer Venus Orbiter, including the radar mapper, radio tracking and the fluxgate magnetometer, is described. Topographic, geological, Bouguer gravity, magnetic, and crustal thickness maps will be constructed from Orbiter data. These maps should provide information on composition and thermal history, the major geological or geophysical provinces, the rate of past and present tectonic activity, and evidence of past or present MHD dynamos.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; June 197
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  • 91
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    The Venus ionosphere and solar wind interaction (1977)
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    Publication Date: 2011-08-17
    Description: The current state of knowledge of the chemistry, dynamics and energetics of the upper atmosphere and ionosphere of Venus is reviewed together with the nature of the solar wind-Venus interaction. Because of the weak, though perhaps not negligible, intrinsic magnetic field of Venus, the mutual effects between these regions are probably strong and unique in the solar system. The ability of the Pioneer Venus Bus and Orbiter experiments to provide the required data to answer the questions outstanding is discussed in detail.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; June 197
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  • 92
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    The thermal balance of the atmosphere of Venus (1977)
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    Publication Date: 2011-08-17
    Description: Current knowledge of the temperature structure of the atmosphere of Venus is briefly summarized. The principal features to be explained are the high surface temperature, the small horizontal temperature contrasts near the cloud tops in the presence of strong apparent motions, and the low value of the exospheric temperature. In order to understand the role of radiative and dynamical processes in maintaining the thermal balance of the atmosphere, a great deal of additional data on the global temperature structure, solar and thermal radiation fields, structure and optical properties of the clouds, and circulation of the atmosphere are needed. The ability of the Pioneer Venus Orbiter and Multiprobe Missions to provide these data is indicated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; June 197
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  • 93
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    Dynamics, winds, circulation and turbulence in the atmosphere of Venus (1977)
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    Publication Date: 2011-08-17
    Description: With the possible exception of the lowest one or two scale heights, the dominant mode of circulation of Venus' atmosphere is a rapid, zonal, retrograde motion. Global albedo variations in the ultraviolet may reflect planetary scale waves propagating relative to the zonal winds. Other special phenomena such as cellular convection in the subsolar region and internal gravity waves generated in the interaction of the zonal circulation with the subsolar disturbance may also be revealed in ultraviolet imagery of the atmosphere. We discuss the contributions of experiments on the Orbiter and Entry Probes of Pioneer Venus toward unravelling the mystery of the planet's global circulation and the role played by waves, instabilities and convection therein
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Space Science Reviews; 20; June 197
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  • 94
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    The ionospheres of Saturn, Uranus, and Neptune (1977)
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    Publication Date: 2011-08-17
    Description: Models of the ionospheres of Saturn, Uranus, and Neptune are presented. It is postulated that galactic cosmic-ray ionization is an important component of these ionospheres. For example, in the case of Neptune, the level of ionization caused by cosmic rays is comparable with that due to solar extreme-ultraviolet (EUV) radiation. The existence of cosmic-ray, as well as solar EUV-produced ionization, could be a valuable diagnostic tool for investigating the atmospheric thermal structure of those planets.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astrophysical Journal; vol. 215
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  • 95
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    Lunar transient phenomena /LTP/ - Manifestations, site distribution, correlations and possible causes (1977)
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    Publication Date: 2011-08-17
    Description: More than 1400 observations of lunar transient phenomena (LTP), encompassing brightenings, darkenings, and gaseous, reddish, and bluish events, are analyzed in an attempt to determine the possible causes of LTP. Hypotheses considered include effects of earth tides on the moon, low-angle illumination, thermal luminescence, UV heating, solar-particle acceleration by the magnetopause of earth's magnetotail, terrestrial magnetotail bow-shock-front turbulence, cathode luminescence due to magnetotail effects, and solar-flare particle bombardment. Analysis are performed in terms of histograms of the number of observations vs. phase of anomalistic period and of number vs. moon's age, percentage of numbers of observed phenomena and percentage of expected numbers as well as their ratios, and albedo behavior over a lunation period of chosen permanent points in ten specific features. The results indicate that different phenomena may have different causes, strong tidal effects are dubious, correlations with sunrise are most frequent, and the distribution of all LTP sites is distinct from that of deep- and shallow-focus moonquake epicenters.
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  • 96
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    The effect of clear-air turbulence on a model of the general circulation of the atmosphere (1977)
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    Publication Date: 2011-08-17
    Description: Mixing coefficients due to clear-air turbulence are estimated from turbulence observations from aircraft, and from large-scale dissipation estimates from the large-scale energy budgets. Maximum coefficients occur near middle-latitude jet streams, and eddy viscosity there is of order of 10 sq m/sec; eddy conductivity is estimated to be about ten times smaller. These coefficients are introduced into the 12-layer general circulation model of the National Center of Atmospheric Research. They produce an apparently significant, though small reduction in maximum speed of the jet, and a reduction in eddy energy. Further, the stratospheric polar-night jet is produced at about the correct location with about the correct intensity.
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    A three-D circulation model study of the radiative-dynamic coupling within the stratosphere (1977)
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    Publication Date: 2011-08-17
    Description: The role of radiative transfer processes in the general circulation of the stratosphere was studied by comparing the thermal and dynamical structure of the stratosphere as simulated by two controlled numerical experiments performed with the aid of a spectral 3-dimensional quasi-geostrophic circulation model. In the first experiment, a detailed radiative transfer model is employed to treat the longwave radiative transfer in the stratosphere. In the second experiment, longwave radiative transfer is accounted for by employing the Newtonian cooling approximation. It is found that the exchange of longwave radiation between the troposphere and lower stratosphere has a net heating effect on the lower stratosphere. It is shown that this heating effect contributes partly to the maintenance of the warm high-latitude belt in the lower stratosphere during winter and spring seasons. The strong temperature dependence of the Newtonian cooling coefficient plays an important role in determining the zonal temperatures and has a significant influence on the transmissivity of stratosphere to propagating planetary scale waves.
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  • 98
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    Minor planets and related objects. XXIII - Photometry of asteroid /7/ Iris (1977)
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    Publication Date: 2011-08-17
    Description: Analysis of light curves and UBV photometry yields a model for (7) Iris as an ellipsoid with axial ratios 3:4:5. The North Pole orientation is near 41 deg ecliptic latitude and 11 deg longitude.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astronomical Journal; 82; June 197
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  • 99
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    Picture of Ganymede (1977)
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    Publication Date: 2011-08-17
    Description: Spin-scan images of Ganymede obtained by the imaging photopolarimeter of Pioneer 10 in December 1973 are described and presented. Intensity measurements in the blue and red scans are provided. The width of the scan elements is 0.5 mrad which is the size of the aperture in the focal plane of the telescope; the height is also 0.5 mrad (1 millisec integration - or dwell-time at 5 rpm spin rate). The distance of Pioneer 10 from Ganymede was 7.8 x 10 to the fifth km, and the resolution is therefore 390 km. The spin-scan image is in general agreement with Lyot's visual observations (Dollfus, 1961). Preliminary results on polarimetry of Ganymede obtained during the flyby of Pioneer 10 are discussed with attention to the question of whether water frost, NaCl powdered crystals, or other substances is responsible for the observed pattern.
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  • 100
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    Phobos and Deimos (1977)
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    Publication Date: 2011-08-17
    Description: Ground-based and spacecraft observations of Phobos and Deimos are reviewed and the satellites' origin is discussed. The crater densities of both bodies are close to the saturation level. The largest impact events may have caused extensive fracturing of their surfaces. The surfaces are at least 1.5 billion years old and may date back to the early history of the solar system. The Martian satellites display large deviations from sphericity. As a result of tidal processes, they are in synchronous rotation. Several independent lines of evidence show that they have regoliths. Despite some provocative arguments, their internal strengths and the nature of their interior are poorly known at present. Photometric measurements suggest that they are made of either carbonaceous chondritic material or a basalt. Sinclair (1972), Born and Duxbury (1975) and Shor (1975) apparently have successfully determined Phobos' secular acceleration. Their value of approximately .001 deg/year/year implies that the interior of Mars has a low specific dissipation factor (about 100), may indicate that a portion of the Martian interior is experiencing partial melting. The low inclination of the satellites' orbits indicates that they were formed as part of the same process that resulted in Mars.
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