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  • Other Sources  (22)
  • NASA Technical Reports  (22)
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  • Other Sources  (22)
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  • 1
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    Precipitation estimation over Sardinia from satellite infrared data (1993)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Three techniques for the estimate of rain rate from infrared satellite images have been examined and modified to be used over the western Mediterranean Sea. An attempt to optimize these techniques has been made by comparing the remotely-sensed precipitation with in situ data, obtained from the rain gauge network over Sardinia, for three different seasons of 1988. The results obtained so far clearly reveal the limitations of infrared remote sensing techniques when applied to precipitation retrievals. However, these results give the possibility of gaining some useful insights on the general problem and show that infrared remote sensing techniques can give acceptable area-time averages of precipitation which are useful for climatological studies.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: International Journal of Remote Sensing (ISSN 0143-1161); 14; 1; p. 115-134.
    Format: text
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  • 2
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    Visible and infrared techniques (1981)
    In:  Other Sources
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    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
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  • 3
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    Relation of satellite-based thunderstorm intensity to radar-estimated rainfall (1981)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 20; Mar. 198
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  • 4
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    Artificial stereo presentation of meteorological data fields (1981)
    In:  Other Sources
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    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
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  • 5
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    Summary of Symposium on Cloud Systems, Hurricanes and TRMM: Celebration of Dr. Joanne Simpson's Career, The First Fifty Years (2000)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: A symposium celebrating the first 50 years of Dr. Joanne Simpson's career took place at the NASA/Goddard Space Flight Center from December 1 - 3, 1999. This symposium consisted of presentations that focused on: historical and personal points of view concerning Dr. Simpson's research career, her interactions with the American Meteorological Society, and her leadership in TRMM; scientific interactions with Dr. Simpson that influenced personal research; research related to observations and modeling of clouds, cloud systems and hurricanes; and research related to the Tropical Rainfall Measuring Mission (TRMM). There were a total of 36 presentations and 103 participants from the US, Japan and Australia. The specific presentations during the symposium are summarized in this paper.
    Keywords: Meteorology and Climatology
    Format: application/pdf
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  • 6
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    A narrow clear zone over Florida and the Atlantic Ocean (1980)
    In:  Other Sources
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    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
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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
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  • 8
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    Stereoscopic observations from meteorological satellites (1982)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Stereo cloud top height measurements, accurate to within + or - 500 m, have been performed using operational weather satellites. The stereo has been demonstrated using various combinations of GEO and LEO satellites, and the use of synthetic stereo was considered. Stereo can be done over most of the earth (60 deg S to 60 deg N) during the day; at higher latitudes and at night, stereo can be done using two LEOs if the proper coincidences occur. The usefulness of stereo cloud top height measurements has been demonstrated by many studies of convective storm cloud systems. Recommendations relating to short, medium, and long term planning regarding stereo observations from meteorological satellites are outlined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: (ISSN 0273-1177)
    Format: text
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  • 9
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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
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  • 10
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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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