French Cooperative Passive Payload (FRECOPA)

The fact that the LDEF satellite mission was extended resulted in a study of FRECOPA system elements. These tests were run on materials, electronics, wiring, and motor drives. It is worthwhile studying these elements as they have been exposed to the low earth orbit for nearly six years, whereas the experimental specimens were exposed for ten months. No functional damage was observed which was induced by impacts or erosion. A decrease in thermal, optical, and mechanical properties for DELRIN and teflon glass fabric induced by erosion and thermal environment was observed. The most important damage parameters are UV radiation and thermal cycling.