Abstract
An assembly, test, and storage of a satellite are carried out in a clean-room to suppress performance degradation of a satellite by particulate accretion. The advanced earth observing satellite 2 (ADEOS-II) was stored in the clean-room at Tanegashima Space Center for 15 months before its launch and the particulate accretion was monitored using collector mirrors during the storage phase of ADEOS-Il. In this study, the chemical composition analysis was performed for the particulate samples on the collector mirrors by an electron-probe micro-analyser. Organic elements, CNO, were remarkably detected and heavy metals, Ti, Cr, Ni, Cu, and Zn, were also detected on a significant level for the samples collected inside the cleanroom. On the other hand, Na, Mg, Ca, Cl, S, and 0, which were the elements of sea salt and/or soil, were detected for the aerosol samples collected under the outdoor environment. Since the chemical compositions between the samples of inside and outside of the cleanroom were clearly different, the sources of suspended particulates inside the cleanroom were ascribed to those inside the cleanroom. Especially, the 70% of analyzed particles collected inside the cleanroom was possible to be classified as particles generated from human bodies and 11 % was classified as fibers.
