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Thermal Analysis of the IUE - Fifteen Years Later
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English
Abstract
The International Ultraviolet Explorer (IUE) is a large astronomical observatory which was launched on January 26, 1978. The observatory was placed into a three-axis stabilized, eccentric synchronous orbit with an inclination of about 29 degrees. Although it was designed for a 3-year lifetime, it is currently still operational. This paper will briefly review the thermal design which consists of multilayer insulation, ammonia-filled grooved heat pipes, bimetallic actuated louvers, and assorted commandable heaters. It will discuss the 15 years of thermal data and compare the results with prelaunch predictions. This paper will also briefly discuss the more significant flight anomalies. Finally, an attempt will be made to discuss any anomalous thermal behavior with an emphasis on the temperature increase of the hydrazine auxiliary propulsion system.
Authors
Citation
Skladany, J. and Stake, L., "Thermal Analysis of the IUE - Fifteen Years Later," SAE Technical Paper 941431, 1994, https://doi.org/10.4271/941431.Also In
References
- Skladany, J. T. Seivold, A. L. “Thermal Control of the International Ultraviolet Explorer,” ASME Paper No. 76-ENAs-38 July 1976
- Skladany, J. T. Kelly, W. H. “Thermal Design of the IUE Hydrazine Auxiliary Propulsion System,” ASME Paper No. 77-ENAs-45 July 1977
- Skladany, J. T. “Thermal Analysis of the IUE-Seven Years Later,” SAE Paper No. 851327 July 1985