Publikationsansicht

Surface Response to Cloud Shadowing. (1998)

Abstract
This study investigated the response of surface temperature to cloud shadows. A quantitative model applicable to IR backgrounds was developed. Time-dependent heat flow and energy budget equations have been solved to determine the diurnal variation in surface ground temperatures for a dry, sandy soil with a simple vegetation layer under various cloud conditions. Ground temperatures were determined to vary up to 2K in the first minute following cloud shadowing of solar illumination; stable soil temperatures were not reached after over an hour of shade. These results indicate the importance of including cloud shadow ing in the SWOE background model.

Details der Publikation
Mitarbeiter SPECTRAL SCIENCES INC BURLINGTON MA
Archiv Defense Technical Information Center OAI-PMH Repository (United States)
Keywords INFRARED DETECTION AND DETECTORS, SOIL MECHANICS, , BACKGROUND, BUDGETS, CLOUDS, DIURNAL VARIATIONS, ENERGY, EQUATIONS, GROUND LEVEL, HEAT TRANSFER, LAYERS, MODELS, RESPONSE, SHADOWS, SOILS, STABILITY, SURFACE TEMPERATURE, SURFACES, TEMPERATURE, TIME DEPENDENCE, VEGETATION., *Shadows, *Infrared radiation, Background radiation, Heat flux, Time dependence, SWOE(Surface Weapons Operability Enhancement), *Soils, Solar radiation, Cloud shadows, Energy budgets, Soil temperature, Boundary layer, Surface temperature, Radiance, Mathematical models, PE62101F, WUPL305402AJ.
Sprache eng