Calculation of external flux: Space environment
Abstract
The principal forms of energy absorbed by a satellite were studied relative to the calculation of its thermal behavior in orbit. Three external radiation sources are identified: direct solar flux; solar flux reflected by the Earth's atmosphere (albedo); and terrestrial infrared flux. Except in the case of solar flux, and then only if reflected solar flux absorption is discounted, the calculation of absorbed external flux was demonstrated as very complex. Practical approximation formulas are presented. Results show that terrestrial radiation and albedo have little influence on a satellite beyond 1200 to 1500 km in altitude. Below this limit, the effect of these heat sources on satellite temperature requires that calculation precision be adapted in consequence.
- Publication:
-
In its Thermal Control of Spaceborne Expts. p 37-46 (SEE N81-27152 18-12
- Pub Date:
- 1981
- Bibcode:
- 1981tcse.nasa...37R
- Keywords:
-
- Flux Quantization;
- Incident Radiation;
- Satellite Surfaces;
- Thermal Absorption;
- Aerospace Environments;
- Earth Albedo;
- Satellite Temperature;
- Solar Flux Density;
- Terrestrial Radiation;
- Fluid Mechanics and Heat Transfer