VARIABLE PARTICULATE ENVIRONMENT AROUND THE SHUTTLE

The Particle Analysis Cameras for Shuttle experiment was flown on Miss ion STS61C (Columbia). This experiment involved a pair of cameras in a stereo-viewing configuration and a coaligned strobe light flash to pe rmit particle observation throughout the entire orbit. Although only o ne camera functioned properly, significant trends and particle counts were still obtained from the film data. We report the analysis occurre nce rates above other manned structures such as the International Spac e Station are presented. (C) 1997 Optical Society of America.