Title :
Rapid calculation of terrain parameters for radiation modeling from digital elevation data
Author :
Dozier, Jeff ; Frew, James
Author_Institution :
California Univ., Santa Barbara, CA, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
Digital elevation models are widely used to calculate terrain parameters to determine incoming solar and longwave radiation for use in surface climate models, interpretation of remote-sensing data, and parameters in hydrologic models. Because of the large number of points in an elevation grid, fast algorithms are useful to save computation time. A description is given of rapid methods for calculating slope and azimuth, solar illumination angle, horizons, and view factors for radiation from sky and terrain. Calculation time is reduced by fast algorithms and lookup tables
Keywords :
atmospheric radiation; atmospheric techniques; geophysical techniques; meteorology; remote sensing; sunlight; topography (Earth); Earth surface radiation; Emerald Lake drainage basin; S Sierra Nevada; USA; computation time; digital elevation data; fast algorithms; horizons; hydrologic models; incoming long-wave radiation; incoming solar radiation; lookup tables; radiation modeling; remote-sensing data; sky radiation; slope angle calculation; slope azimuth calculation; solar illumination angle; surface climate models; terrain parameters; terrain radiation view factor; thermal IR radiation; view factor; Azimuth; Digital elevation models; Grid computing; Lighting; NASA; Remote sensing; Satellites; Soil moisture; Surface topography; Surface waves; Table lookup; Wind speed;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
