Variation in Ground Brightness Over Northeastern United States as Sensed by GOES Satellites PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Variation in Ground Brightness Over Northeastern United States as Sensed by GOES Satellites PDF full book. Access full book title Variation in Ground Brightness Over Northeastern United States as Sensed by GOES Satellites by Thomas J. Keegan. Download full books in PDF and EPUB format.
Author: Thomas J. Keegan Publisher: ISBN: Category : Cloud forecasting Languages : en Pages : 24
Book Description
The first step in an investigation of the use of satellite imagery data in automated short-range forecasts of clouds and precipitation is to examine the variation in ground brightness under clear-sky conditions. Bedford, Massachusetts, Albany, New York, Pittsburgh, Pennsylvania, and Dulles International Airport, Virginia, were selected as test sites for the period March to December 1977. Data were corrected for error and noise. Navigation was fine-tuned to an accuracy of 1 to 2 pixels. Average, standard deviation, maximum, minimum and range of brightness were computed over a range of area sizes around each station in order to establish a stable sample size. The statistics stabilized by a 5 x 5 pixel area. Although the number of cases was small, necessitating combining stations, the correlation between brightness and sun angle was high. The slope of the regression curve between these variables was steeper in spring and fall than in summer. Additional data are needed, but it is expected that they will refine rather than revise significantly the present results. (Author).
Author: Thomas J. Keegan Publisher: ISBN: Category : Cloud forecasting Languages : en Pages : 24
Book Description
The first step in an investigation of the use of satellite imagery data in automated short-range forecasts of clouds and precipitation is to examine the variation in ground brightness under clear-sky conditions. Bedford, Massachusetts, Albany, New York, Pittsburgh, Pennsylvania, and Dulles International Airport, Virginia, were selected as test sites for the period March to December 1977. Data were corrected for error and noise. Navigation was fine-tuned to an accuracy of 1 to 2 pixels. Average, standard deviation, maximum, minimum and range of brightness were computed over a range of area sizes around each station in order to establish a stable sample size. The statistics stabilized by a 5 x 5 pixel area. Although the number of cases was small, necessitating combining stations, the correlation between brightness and sun angle was high. The slope of the regression curve between these variables was steeper in spring and fall than in summer. Additional data are needed, but it is expected that they will refine rather than revise significantly the present results. (Author).
Author: H. Stuart Muench Publisher: ISBN: Category : Cloud forecasting Languages : en Pages : 52
Book Description
This report summarizes the work accomplished during the first phase of an investigation concerning methods of introducing digitized satellite imagery into short-range, objective forecasting operations. The data archive being assembled for this study is described, with particular attention given to the steps taken to maximize the accuracy of the satellite imagery. These steps included 'fine tuning' the navigation and selecting procedures for 'normalizing' the data by correcting for the effects of Lambertian and anisotropic scattering. Consistency of the data, spatial and temporal, was tested by analysis of ground reflectance during cloudless days, and a pilot test of the specification of single layers of clouds was conducted. Both of these tests gave encouraging results. An investigation of specifying precipitation rate, using just the visible reflectance and infrared temperature of the cloud top, also produced good results. Nomograms for the average rate during the hour following the satellite observation, as well as for the probability of observing more than 0.01 in. and 0.10 in. of precipitation, are illustrated. Two appendices present the geometrical and optical equations relevant to the investigation. (Author).
Author: Environmental Science Information Center. Library and Information Services Division Publisher: ISBN: Category : Ecology Languages : en Pages : 96
Author: Prasad Thenkabail Publisher: CRC Press ISBN: 1482282674 Category : Technology & Engineering Languages : en Pages : 2262
Book Description
A volume in the three-volume Remote Sensing Handbook series, Remote Sensing of Water Resources, Disasters, and Urban Studies documents the scientific and methodological advances that have taken place during the last 50 years. The other two volumes in the series are Remotely Sensed Data Characterization, Classification, and Accuracies, and Land Reso
Author: Ph.D., Prasad S. Thenkabail Publisher: CRC Press ISBN: 1482217988 Category : Technology & Engineering Languages : en Pages : 869
Book Description
A volume in the three-volume Remote Sensing Handbook series, Land Resources Monitoring, Modeling, and Mapping with Remote Sensing documents the scientific and methodological advances that have taken place during the last 50 years. The other two volumes in the series are Remotely Sensed Data Characterization, Classification, and Accuracies, and Remo
Author: Thomas J. Keegan
Author: Thomas J. Keegan
Author: 
Author: Thomas J. Keegan
Author: H. Stuart Muench
Author: Air Force Cambridge Research Laboratories (U.S.)
Author: 
Author: Technology Reports Centre (Great Britain)
Author: Environmental Science Information Center. Library and Information Services Division
Author: Prasad Thenkabail
Author: Ph.D., Prasad S. Thenkabail