Specification Of Cloud Amount Over Local Areas From Goes Visual Imagery
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Scientific and Technical Aerospace Reports
Author | : |
Publisher | : |
Total Pages | : 652 |
Release | : 1994 |
Genre | : Aeronautics |
ISBN | : |
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.
Government Reports Annual Index
Author | : |
Publisher | : |
Total Pages | : 1132 |
Release | : 1986 |
Genre | : Government reports announcements & index |
ISBN | : |
Short-range Forecasting of Cloudiness and Precipitation Through Extrapolation of GOES Imagery
Author | : H. Stuart Muench |
Publisher | : |
Total Pages | : 50 |
Release | : 1981 |
Genre | : Cloud forecasting |
ISBN | : |
This report describes the development and testing of an objective technique to forecast cloudiness and precipitation through extrapolation of satellite imagery. By utilizing on objectively determined cloud-motion vector, the technique makes local forecasts of satellite parameters (brightness and IR temperature), with high temporal resolution, using simple linear extrapolation. Algorithms are then used to convert the satellite parameters to total cloud cover, probability of 1-hour precipitation, and presence of low, middle, and high clouds. The test program computed motion vectors and made forecasts out to 7 hours, in half-hour steps, at 30 locations. The program was tested on 12 spring and fall cases, using half-hourly GOES imagery. For periods beyond 2 hours, forecasts of cloud cover and precipitation were markedly better than persistence, which deficiencies in specification hindered short-period performance. Forecasts of cloud layers were worse than persistence due to inadequate specification algorithms. The net results were quite encouraging, and further refinements and developments are planned.
R & D Abstracts
Author | : Technology Reports Centre (Great Britain) |
Publisher | : |
Total Pages | : 924 |
Release | : 1981 |
Genre | : |
ISBN | : |