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  • 1
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    A TRMM-calibrated infrared rainfall algorithm applied over Brazil (2002)
    American Geophysical Union
    Details
    Publication Date: 2002-01-01
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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    PAPER CURRENT
  • 2
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    Artificial Stereo Presentation of Meteorological Data Fields (1981)
    American Meteorological Society
    Details
    Publication Date: 1981-07-01
    Print ISSN: 0003-0007
    Electronic ISSN: 1520-0477
    Topics: Geography , Physics
    Published by American Meteorological Society
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    PAPER CURRENT
  • 3
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    Visible and infrared techniques (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Time-dependent indexing schemes and time-dependent life-history techniques are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Precipitation Meas. from Space:; 10 p
    Format: text
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  • 4
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    Relation of satellite-based thunderstorm intensity to radar-estimated rainfall (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 20; Mar. 198
    Format: text
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  • 5
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    Artificial stereo presentation of meteorological data fields (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The innate capability to perceive three-dimensional stereo imagery has been exploited to present multidimensional meteorological data fields. Variations on an artificial stereo technique first discussed by Pichel et al. (1973) are used to display single and multispectral images in a vivid and easily assimilated manner. Examples of visible/infrared artificial stereo are given for Hurricane Allen and for severe thunderstorms on 10 April 1979. Three-dimensional output from a mesoscale model also is presented. The images may be viewed through the glasses inserted in the February 1981 issue of the Bulletin of the American Meteorological Society, with the red lens over the right eye. The images have been produced on the interactive Atmospheric and Oceanographic Information Processing System (AOIPS) at Goddard Space Flight Center. Stereo presentation is an important aid in understanding meteorological phenomena for operational weather forecasting, research case studies, and model simulations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 62
    Format: text
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  • 6
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    A narrow clear zone over Florida and the Atlantic Ocean (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A narrow cloud-free zone of large longitudinal extent was observed in visible and infrared satellite imagery on September 21, 1978. An attempt to explain the zone in terms of subsidence induced by a transverse frontal circulation is presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review; 108; Apr. 198
    Format: text
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  • 7
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    Cloud-top structure of tornadic storms on 10 April 1979 from rapid scan and stereo satellite observations (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Stereoscopic data from near-synchronous eastern and western GOES satellite 3 min interval visible and IR measurements and ground-based radar are used to examine the Wichita Falls, TX tornado of April, 1979. The visible wavelength scan was at 0.6 micron, while the IR was at 11 microns, and additional IR blackbody temperatures were acquired from the Tiros-N spacecraft. A minimum cloud top temperature of 208 K located the point of tornadogenesis. The cloud top cooling rate was determined to be 7 K/21 min above the tropopause preceding the tornado, while a warm area at 221 K developed downwind at the same time. It was found that temperature differences of 10 K can exist between GOES and Tiros-N anvil top measurements, and reach 20 K in the case of a young thunderstorm.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 63
    Format: text
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  • 8
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    Rain estimation from satellites - An examination of the Griffith-Woodley Technique (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The Griffith-Woodley Technique (GWT) is an approach to estimating precipitation using infrared observations of clouds from geosynchronous satellites. It is examined in three ways: an analysis of the terms in the GWT equations; a case study of infrared imagery portraying convective development over Florida; and the comparison of a simplified equation set and resultant rain map to results using the GWT. The objective is to determine the dominant factors in the calculation of GWT rain estimates. Analysis of a single day's convection over Florida produced a number of significant insights into various terms in the GWT rainfall equations. Due to the definition of clouds by a threshold isotherm the majority of clouds on this day did not go through an idealized life cycle before losing their identity through merger, splitting, etc. As a result, 85 percent of the clouds had a defined life of 0.5 or 1 h. For these clouds, the terms in the GWT which are dependent on cloud life history become essentially constant. The empirically derived ratio of radar echo area to cloud area is given a singular value (0.02) for 43 percent of the sample, while the rainrate term is 20.7 mmh-1 for 61 percent of the sample. For 55 percent of the sampled clouds, the temperature weighting term is identically 1.0. Cloud area itself is highly correlated (r = 0.88) with GWT computed rain volume. An important, discriminating parameter in the GWT is the temperature defining the coldest 10 percent cloud area. The analysis further shows that the two dominant parameters in rainfall estimation are the existence of cold cloud and the duration of cloud over a point. Previously announced in STAR as N84-13735
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Climate and Applied Meteorology (ISSN 0733-3021); 23; 102-116
    Format: text
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  • 9
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    AOIPS 3 User's guide. Volume 1: Overview and software utilization (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This is Volume I of the Atmospheric and Oceanographic Information Processing System (AOIPS) User's Guide. AOIPS 3 is the version of the AOIPS software as of April 1989. The AOIPS software was developed jointly by the Goddard Space Flight Center and General Sciences Corporation. Volume 1 is intended to provide the user with an overall guide to the AOIPS system. It introduces the user to AOIPS system concepts, explains how programs are related and the necessary order of program execution, and provides brief descriptions derived from on-line help for every AOIPS program. It is intended to serve as a reference for information such as: program function, inmput/output variable descriptions, program limitations, etc. AOIPS is an interactive meteorological processing system with capabilities to ingest and analyze the many types of meteorological data. AOIPS includes several applications in areas of relevance to meteorological research. AOIPS is partitioned into four applications components: satellite data analysis, radar data analysis, aircraft data analysis, and utilities.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-100724 , REPT-89B00096 , NAS 1.15:100724
    Format: application/pdf
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  • 10
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    Rain estimation from satellites: An examination of the Griffith-Woodley technique (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Griffith-Woodley Technique (GWT) is an approach to estimating precipitation using infrared observations of clouds from geosynchronous satellites. It is examined in three ways: an analysis of the terms in the GWT equations; a case study of infrared imagery portraying convective development over Florida; and the comparison of a simplified equation set and resultant rain map to results using the GWT. The objective is to determine the dominant factors in the calculation of GWT rain estimates. Analysis of a single day's convection over Florida produced a number of significant insights into various terms in the GWT rainfall equations. Due to the definition of clouds by a threshold isotherm the majority of clouds on this day did not go through an idealized life cycle before losing their identity through merger, splitting, etc. As a result, 85% of the clouds had a defined life of 0.5 or 1 h. For these clouds the terms in the GWT which are dependent on cloud life history become essentially constant. The empirically derived ratio of radar echo area to cloud area is given a singular value (0.02) for 43% of the sample, while the rainrate term is 20.7 mmh-1 for 61% of the sample. For 55% of the sampled clouds the temperature weighting term is identically 1.0. Cloud area itself is highly correlated (r=0.88) with GWT computed rain volume. An important, discriminating parameter in the GWT is the temperature defining the coldest 10% cloud area. The analysis further shows that the two dominant parameters in rainfall estimation are the existence of cold cloud and the duration of cloud over a point.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-84969 , NAS 1.15:84969
    Format: application/pdf
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