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  • 1
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    Satellite borne dual millimetric wave length radar (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The failure of attempts to accurately measure precipitation by using a single quality that is used to deduce the desired precipitation parameter through a derived relationship is discussed. A number of dual measurement techniques for the accurate determination of instantaneous rainfall rates from space are proposed. It is concluded that dual measurement techniques show high promise for measuring precipitation parameters with greater accuracy than that which was possible in the past.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center Precipitation Meas. from Space:; 7 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Spaceborne radar (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The spaceborne radar panel considered how radar could be used to measure precipitation from satellites. The emphasis was on how radar could be used with radiometry (at microwave, visible (VIS), and infrared (IR) wavelengths) to reduce the uncertainties of measuring precipitation with radiometry alone. In addition, the fundamental electromagnetic interactions involved in the measurements were discussed to determine the key work areas for research and development to produce effective instruments. Various approaches to implementing radar systems on satellites were considered for both shared and dedicated instruments. Finally, a research and development strategy was proposed for establishing the parametric relations and retrieval algorithms required for extracting precipitation information from the radar and associated radiometric data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Precipitation Meas. from Space:; 9 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Ground-truth measurement systems (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Ground-truth measurements of precipitation and related weather events are an essential component of any satellite system designed for monitoring rainfall from space. Such measurements are required for testing, evaluation, and operations; they provide detailed information on the actual weather events, which can then be compared with satellite observations intended to provide both quantitative and qualitative information about them. Also, very comprehensive ground-truth observations should lead to a better understanding of precipitation fields and their relationships to satellite data. This process serves two very important functions: (a) aiding in the development and interpretation of schemes of analyzing satellite data, and (b) providing a continuing method for verifying satellite measurements.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Precipitation Meas. from Space:; 5 p
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Atmospheric probing by Doppler radar (1969)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A survey is presented of the application of Doppler techniques to the study of atmospheric phenomena. Particular emphasis is placed on the requirement of adequate digital processing means for the Doppler signal and the Doppler data which are acquired at a very high rate. The need is discussed of a two or three Doppler method as an ultimate approach to the problem of observing the three-dimensional field of particle motion inside convective storms.
    Keywords: GEOPHYSICS
    Type: NAS-NRC Atmospheric Exploration by Remote Probes, Vol. 2; p 253-285
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Doppler radar observation of thunderstorm circulation in the 1977 trip program (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Storm data obtained on August 1, 1977 are examined in an attempt to interpret the relationship between lightning occurrence and the thunderstorm inner dynamics and precipitation processes. Horizontal maps are presented which indicated the position of radiation sources detected by the Lightning Detection and Ranging (LDAR) network, together with the horizontal motion fields and radar reflectivity data. Detailed inspection of these fields showed that, although radiation sources are found in the vicinity of precipitation cells, they are not located in the heavy precipitation areas, but rather on their rear side in regions where the configuration of the wind fields suggests the presence of updrafts.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Conference on Radar Meteorology; Mar 28, 1978 - Mar 31, 1978; Atlanta, GA
    Format: text
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    NASA TECHNICAL REPORTS
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