Tests Of Spectral Cloud Classification Using Dmsp Fine Mode Satellite Data
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Tests Of Spectral Cloud Classification Using Dmsp Fine Mode Satellite Data
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Author : James T. Bunting
language : en
Publisher:
Release Date : 1980
Tests Of Spectral Cloud Classification Using Dmsp Fine Mode Satellite Data written by James T. Bunting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Image processing categories.
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).
Environmental Research Papers
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Author :
language : en
Publisher:
Release Date :
Environmental Research Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Environmental geology categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1991
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
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.
Tests Of Spectral Cloud Classification Using Dmsp Fine Mode Satellite Data
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Author : James T. Bunting
language : en
Publisher:
Release Date : 1980
Tests Of Spectral Cloud Classification Using Dmsp Fine Mode Satellite Data written by James T. Bunting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
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).
Report On Research At Afcrl
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Author : Air Force Cambridge Research Laboratories (U.S.)
language : en
Publisher:
Release Date : 1976
Report On Research At Afcrl written by Air Force Cambridge Research Laboratories (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Geophysics categories.
Cloud Classification And Its Application To Statistically Derived Radiative Energy Budgets
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Author : Michael Adam Friedman
language : en
Publisher:
Release Date : 1998
Cloud Classification And Its Application To Statistically Derived Radiative Energy Budgets written by Michael Adam Friedman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Classification And Analysis Of Surface And Clouds At High Latitudes From Avhrr Multispectral Satellite Data
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Author : Elizabeth Eby Ebert
language : en
Publisher:
Release Date : 1987
Classification And Analysis Of Surface And Clouds At High Latitudes From Avhrr Multispectral Satellite Data written by Elizabeth Eby Ebert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Digest
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Author :
language : en
Publisher:
Release Date : 1987
Digest written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Earth sciences categories.
Digital Image Processing And Visual Communications Technologies In Meteorology
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Author : Paul Janota
language : en
Publisher:
Release Date : 1987
Digital Image Processing And Visual Communications Technologies In Meteorology written by Paul Janota and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Computers categories.
Cires Cooperative Institute For Research In Environmental Sciences University Of Colorado At Boulder
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Author : University of Colorado Boulder. Cooperative Institute for Research in Environmental Sciences
language : en
Publisher:
Release Date : 1989
Cires Cooperative Institute For Research In Environmental Sciences University Of Colorado At Boulder written by University of Colorado Boulder. Cooperative Institute for Research in Environmental Sciences and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Environmental engineering categories.