Specification Of Current And Future Cloud Amounts And Ceilings From Satellite Data
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Specification Of Current And Future Cloud Amounts And Ceilings From Satellite Data
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Author : John H. Conover
language : en
Publisher:
Release Date : 1975
Specification Of Current And Future Cloud Amounts And Ceilings From Satellite Data written by John H. Conover and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Ceilometer categories.
Objective methods and their accuracies for deriving current and six-hour forecasts of cloud amount and ceiling from satellite data are presented. Data from the visible and IR window bands were tested to develop relationships. The IR data did not significantly improve the results. The visible data were carefully calibrated, navigated, and normalized for solar elevation and bidirectional reflectance. Cloud motions were also used for the six-hour forecasts. The data were reduced to values of average brightness and its standard deviation over 1/2 deg by 1/2 deg areas before analysis. RMSE of current cloud amounts (on a scale of 0 to 1) are about 0.25 and for six hours later about 0.35. The occurrence of a ceiling/no ceiling was specified correctly 80% and 70% of the time at zero and six hours, respectively. Various methods are shown for minimization of ceiling errors over different height ranges. In general, RMSE of specified and forecast ceilings range from 4000 to 6000 ft at low levels to 9000 to 10,000 ft at mid and high levels. (Author).
Specification Of Current And Future Cloud Amounts And Ceilings From Satellite Data
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Author : John H. Conover
language : en
Publisher:
Release Date : 1975
Specification Of Current And Future Cloud Amounts And Ceilings From Satellite Data written by John H. Conover and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Cloud forecasting categories.
Objective methods and their accuracies for deriving current and six-hour forecasts of cloud amount and ceiling from satellite data are presented. Data from the visible and IR window bands were tested to develop relationships. The IR data did not significantly improve the results. The visible data were carefully calibrated, navigated, and normalized for solar elevation and bidirectional reflectance. Cloud motions were also used for the six-hour forecasts. The data were reduced to values of average brightness and its standard deviation over 1/2 deg by 1/2 deg areas before analysis. RMSE of current cloud amounts (on a scale of 0 to 1) are about 0.25 and for six hours later about 0.35. The occurrence of a ceiling/no ceiling was specified correctly 80% and 70% of the time at zero and six hours, respectively. Various methods are shown for minimization of ceiling errors over different height ranges. In general, RMSE of specified and forecast ceilings range from 4000 to 6000 ft at low levels to 9000 to 10,000 ft at mid and high levels. (Author).
Air Force Surveys In Geophysics
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Author :
language : en
Publisher:
Release Date : 1975
Air Force Surveys In Geophysics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Geophysics categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1993
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 1993 with Aeronautics categories.
Report On Research At Afcrl
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Author : Air Force Cambridge Research Laboratories (U.S.)
language : en
Publisher:
Release Date : 1974
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 1974 with Geophysics categories.
Catalogs Of The Scripps Institution Of Oceanography Library
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Author : Scripps Institution of Oceanography. Library
language : en
Publisher:
Release Date : 1980
Catalogs Of The Scripps Institution Of Oceanography Library written by Scripps Institution of Oceanography. Library and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Marine biology categories.
An Introductory Guide To Ec Competition Law And Practice
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Author : Valentine Korah
language : en
Publisher:
Release Date : 1994
An Introductory Guide To Ec Competition Law And Practice written by Valentine Korah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Antitrust law categories.
National Union Catalog
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Author :
language : en
Publisher:
Release Date : 1981
National Union Catalog written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with American literature categories.
Includes entries for maps and atlases.
National Union Catalog 1981
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Author :
language : en
Publisher:
Release Date : 1982
National Union Catalog 1981 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with American literature categories.
Meteorological And Geoastrophysical Abstracts
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Author :
language : en
Publisher:
Release Date : 1996
Meteorological And Geoastrophysical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Astrophysics categories.