This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental and Flight Determination of the Solar Absorptance for an OSR Radiator as a Function of Incidence Angle
Annotation ability available
Sector:
Language:
English
Abstract
An INTELSAT-funded experiment to determine the solar absorptance of optical solar reflectors (OSRs) as a function of incidence angle has confirmed the initial findings from flight data reduction on the COMSAT COMSTAR Beacon experiments. The OSR solar absorptance is shown to increase with increasing sun incidence angle. The magnitude of the increase for a body-stabilized spacecraft in geosynchronous orbit during peak solar illumination and a 66.5° incidence angle is 20 percent larger than the value normally derived from spectrophotometer measurements. These results help to explain the increases in spacecraft temperature and OSR degradation observed on many spacecraft immediately after launch which heretofore have been attributed to outgassing effects.
Recommended Content
Authors
Citation
Kelly, W. and Reisenweber, J., "Experimental and Flight Determination of the Solar Absorptance for an OSR Radiator as a Function of Incidence Angle," SAE Technical Paper 860978, 1986, https://doi.org/10.4271/860978.Also In
References
- Spencer A. L. et al. “INTELSAT VI Thermal Design, Testing and Flight Performance,” AIAA and ASME Third Joint Thermophysics, Fluids, Plasma, and Heat Transfer Conference St. Louis, Missouri 1982
- Hyman, N. L. “Solar Absorptance Degradation of OSR Radiators on the COMSTAR Satellites,” Spacecraft Radiative Transfer and Temperature Control Norton, T. E. 83 New York American Institute of Aeronautics and Astronautics 1982 212 232
- Bouchez J. P. et al. “OTS-2; Results from Thermal Tests on a Satellite During Six Years in a Geostationary Orbit,” AIAA 19th Thermophysics Conference Snowmass, Colorado 1984
- Chalmers, D. R. “Solar Absorptance Degradation of OSR Radiators on European Communications Satellites,” AIAA 19th Thermophysics Conference Snowmass, Colorado 1984
- Stultz, J. W. “Solar Absorptance of Second Surface Mirrors for High Incidence,” paper presented at the AIAA and ASME Thermophysics and Heat Transfer Conference Boston, Massachusetts 1984
- Hyman, N. L. “Solar Absorptance Degradation of Che COMSTAR Satellite Centimeter-Wave Beacon Thermal Radiators,” COMSAT Technical Review 11 1 1981
- Kelly W. H. Reiseaweber, J. H. “Experimental Measurement of Solar Absorptance of an INTELSAT VI OSR Radiator as a Function of Incidence Angle,” COMSAT Technical Review 15 2A 1985 260 274
- Private communication