Spectrometer cryocooler found to have deteriorating performance since mishap. Spectrometer cryocooler flight spare starts also exhibiting problems during burn-in tests. After the thermal test and fix of frangibolt wiring, spacecraft is powered up and running most days. Flight operations team continues preparations, including simulations of Launch and Early Orbit plus regular passes. Review meeting between GSFC and UCB held on April 4.
Recommendation is to do more inspection plus a thermal test.
Spectrometer removed and tested for leaks. Solar arrays integrated and thermal blankets installed. Pass EMC testing. Pass random vibration testing. Review team gathered to investigate the over-test.