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Automated Satellite Cloud Analysis
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Book Synopsis Automated Satellite Cloud Analysis by : Robert C. Allen (Jr.)
Download or read book Automated Satellite Cloud Analysis written by Robert C. Allen (Jr.) and published by . This book was released on 1987 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: An algorithm is developed and evaluated for discriminating among clouds, snow cover and clear land. The multispectral technique uses daytime images of AVHRR channels 1 (0.63 microns, 3 (3.7 microns) and 4 (11.0 microns). Reflectance is derived for channel 3 by using the channel 4 emission temperature to estimate and remove the channel 3 thermal emission. Separation of clouds from snow and land is based primarily on this derived channel 3 reflectance. Using this technique, observed reflectance in channel 3 is 2 to 4% for snow, 3 to 10 % for land, 2 to 27 % for ice clouds and 8 to 36 % for liquid clouds. These values overlap for thin cirrus and snow, so the routine than attempts analysis of cirrus based on its different transmissive properties between channels 3 and 4. Six images were analyzed and the total cloud cover was verified against a total of 110 conventional surface observations using the standard categories of clear, scattered, broken and overcast. The routine was quite successful, with the analyzed sky cover being within category for 55% of the stations, one category different for 33%, 2 categories different for 9% and 3 categories for 3% of the stations. A major remaining problem is discrimination between ice clouds and snow cover due to the great similarity of reflective properties of there two surfaces.
Book Synopsis Automated Satellite Cloud Analysis by : Phillips Laboratory
Download or read book Automated Satellite Cloud Analysis written by Phillips Laboratory and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automated Satellite Cloud Analysis by : Gary B. Gustafson
Download or read book Automated Satellite Cloud Analysis written by Gary B. Gustafson and published by . This book was released on 1994 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of the SPADS Automated Cloud Analysis Program by : Christopher A. Moren
Download or read book An Evaluation of the SPADS Automated Cloud Analysis Program written by Christopher A. Moren and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation of the Satellite Data Processing and Display System automated cloud and precipitation intensity analysis program is presented. The program uses the Geostationary Observational Environmental Satellite visual and infrared imagery to produce contoured digital displays of cloud amount, cloud type, cloud-top temperature, cloud-top height and precipitation intensity for an approximate 1024 x 1024 n mi area centered at 35 deg N 80 deg W. Verification consists of correlating surface and upper-air observations, pilot reports, automated radar summaries and a manual analysis of the satellite imagery to the contoured digital display from the automated cloud analysis program for five cases during the summer 1983. The test results indicate considerable skill, particularly for cloud amount, cloud-top temperature and cloud-top height. The cloud type and precipitation intensity results were generally consistent but further testing is required to refine the thresholds and the standard deviation values for discrimination of particular cloud types.
Book Synopsis Advances in Geoscience and Remote Sensing by : Gary Jedlovec
Download or read book Advances in Geoscience and Remote Sensing written by Gary Jedlovec and published by IntechOpen. This book was released on 2009-10-01 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remote sensing is the acquisition of information of an object or phenomenon, by the use of either recording or real-time sensing device(s), that is not in physical or intimate contact with the object (such as by way of aircraft, spacecraft, satellite, buoy, or ship). In practice, remote sensing is the stand-off collection through the use of a variety of devices for gathering information on a given object or area. Human existence is dependent on our ability to understand, utilize, manage and maintain the environment we live in - Geoscience is the science that seeks to achieve these goals. This book is a collection of contributions from world-class scientists, engineers and educators engaged in the fields of geoscience and remote sensing.
Book Synopsis Evaluation of Automated Imagery Analysis Algorithms for Use in the Three-dimensional Nephanalysis Model at AFGWC by : Robert Paul D'Entremont
Download or read book Evaluation of Automated Imagery Analysis Algorithms for Use in the Three-dimensional Nephanalysis Model at AFGWC written by Robert Paul D'Entremont and published by . This book was released on 1982 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The AFGWC Automated Cloud Analysis Model by : Falko K. Fye
Download or read book The AFGWC Automated Cloud Analysis Model written by Falko K. Fye and published by . This book was released on 1978 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force Global Weather Central (AFGWC) automated cloud analysis program (3DNEPH) produces high resolution, three-dimensional analyses of clouds over the entire globe. Up to eight analyses are scheduled per day with additional limited area analyses available on request. Horizontal grid spacing is 25 nautical miles and the vertical grid consists of 15 layers of varying thickness from the earth's surface to 55,000 feet above mean sea level. The program is a string of individual modules which process and integrate meteorological cloud information from surface, pilot, and upper air reports. An additional capability to interpret and incorporate visual and infrared satellite imagery results in high resolution, worldwide coverage. Recent advances in the techniques and methodology for interpreting satellite imagery are described. A new manual data input processor, quality control procedures, and applications are also described. An appendix provides detailed information on the high resolution terrain, geography, temperature, and background brightness (albedo) fields used to support the model. A history of the model is included and detailed descriptions of the satellite processing algorithms are also provided. Samples of displayed data using several display methods are included.
Book Synopsis A New Automatic Processing Technique for Satellite Imagery Analysis by : R. S. Hawkins
Download or read book A New Automatic Processing Technique for Satellite Imagery Analysis written by R. S. Hawkins and published by . This book was released on 1977 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach to the analysis of satellite imagery is presented. The central part of this approach is an algorithm which compresses information stored in the ordinary six or eight bits per picture element into only one bit. The quality of this compression is demonstrated by examples of its application to high resolution visual imagery. Both visual inspection and rms difference criterion are used for this evaluation. There are four objectives of this report which are: to review the status of processing techniques which remove redundant information, to show the need for redundance reduction in the processing of satellite images, to present the development of an algorithm for reducing it, and to show results obtained by application of the algorithm to visual imagery. Also, comments are made on needed developments of the technique and its potential application to problems of analysis of satellite imagery data. (Author).
Book Synopsis Fortegnelse over statistiske Bureaus Bogsamling by :
Download or read book Fortegnelse over statistiske Bureaus Bogsamling written by and published by . This book was released on 1895 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tests of Spectral Cloud Classification Using DMSP Fine Mode Satellite Data by : James T. Bunting
Download or read book Tests of Spectral Cloud Classification Using DMSP Fine Mode Satellite Data written by James T. Bunting and published by . This book was released on 1980 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer-based processor for satellite imagery was tested on samples of DMSP visible and IR imagery data smoothed to 0.6 n mi resolution. The data were displayed on the AFGL Man-computer Interactive Data Access System so that meteorologists could label small areas (25 x 25 n mi) with one of nine possible cloud categories from the AF 3D Nephanalysis Program (3DNEPH). The computer-based processor labeled the same areas by computing a two-dimensional fast Fourier transform (FFT) and comparing the results to average wavenumber spectra for the cloud categories. Classification accuracies were 65% for visible, 65% for IR and 81% for combined data. The classification accuracies were appreciably better than chance and a simplified processor which used only the averaged values of satellite data over an area. Accuracies improved is some categories were merged. The results were also compared to a cloud typing procedure in the 3DNEPH and to some earlier studies. The results were generally good for categories with small-scale cloud features such as cumulus or cirrus clouds, but the overall accuracy of classification for all cloud categories was not significantly better than verifications cited in earlier studies. Two potential refinements to the spectral processors, namely, removing the effects of backgrounds such as land, water, and snow cover and minimizing sensitivity to varying fractional cloud cover from case to case, are also discussed. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Visible Infrared Imager Radiometer Suite by : Keith D. Hutchison
Download or read book Visible Infrared Imager Radiometer Suite written by Keith D. Hutchison and published by CRC Press. This book was released on 2016-04-19 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Visible Infrared Imager Radiometer Suite (VIIRS) is the next-generation multispectral imaging instrument to fly on US operational, polar-orbiting meteorological satellites. VIIRS will gather data across 22 spectral bands and be used to create products for a variety of applications including weather forecasting and climate change studies. VIIRS
Book Synopsis Proceedings of the 7th Technical Exchange Conference, El Paso, Texas, 30 November-3 December 1976 by :
Download or read book Proceedings of the 7th Technical Exchange Conference, El Paso, Texas, 30 November-3 December 1976 written by and published by . This book was released on 1977 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 32 (thesis year 1987) a total of 12,483 theses titles from 22 Canadian and 176 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 32 reports theses submitted in 1987, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book IGARSS '87 written by and published by . This book was released on 1987 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1988 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The AFGWC (Air Force Global Weather Central) Automated Real-Time Cloud Analysis Model by : Raymond B. Kiess
Download or read book The AFGWC (Air Force Global Weather Central) Automated Real-Time Cloud Analysis Model written by Raymond B. Kiess and published by . This book was released on 1988 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The RTNEPH (Real Time NEPHanalysis) model replaced the 3DNEPH (3- Dimensional NEPHanalysis) model in August, 1983 as the AFGWC (Air Force Global Weather Central) automated cloud analysis model. It uses a horizontal grid spacing of 25 nautical miles and uses four floating layers in the vertical. The RTNEPH uses visual and infrared data from meteorological satellites as well as surface observations, radiosonde data, and aircraft reported data to produce its analysis. A capability exists to manually modify the analysis to correct deficiencies. This nephanalysis is then used as input for AFGWC's cloud forecast models and is stored for climatological purposes by the USAF Environmental Technical Applications Center. The RTNEPH is scheduled to undergo a technical enhancement to incorporate multi-spectral techniques, use finer resolution satellite data, and produce a 12.5 nautical mile resolution analysis. Keywords: Cloud analysis, Meteorology, Nephanalysis, Polar orbiting satellite data.
