Measurements of Outgassing from Satellites

Details Measurements of Outgassing from Satellites Measurements of Outgassing from Satellites

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.558..445c&link_type=abstract

Proceedings of the 5th International Symposium on Environmental Testing for Space Programmes Noordwijk, The Netherlands (ESA SP-

Computer Science

Scientific paper

TQCM(Thermoelectric Quartz Crystal Microbalance)s and witness plates were used to measure the molecular contamination for satellites and the outgassing from satellites during vacuum bake-out tests and thermal vacuum tests at KARI(Korea Aerospace Research Institute). First, vacuum bake-out tests were performed several times for the satellite, KAISTSAT-4(KAIST Satellite-4) flight model, and its components under different temperature conditions. Second, thermal vacuum tests for KOMPSAT-2(Korea Multi-Purpose Satellite-2) flight model were done under specific environment conditions. Through the measurements by TQCMs, the mass and the mass deposition rate of a molecular contamination could be traced in a real time. The molecular contamination of witness plates' surfaces could also be measured through an infrared spectrometer, and those results were compared to the TQCMs' results. And the materials from the decontamination plate of the thermal vacuum chamber after the tests were also analyzed using a GC-MS (Gas Chromatograph - Mass Spectrometer).

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