These days are still open due to the time-tagged STIS associations that went to trouble in calibration, several bad archive responses, a set of astrometry observations that have not yet been received, and some observations on day 288 which have not yet been archived. Good attitude before acquisition, large error null bias, and high roll error after acquisition suggest possible error in saved FGS error null bias. Observed large FGS attitude error for V1 after each loss of lock. Observed large V1 error after each loss of lock. The target star for FGS2 was the same in all case.
Star quality is suspected.
Global comment files were made for the obsets that may have been affected by losses of lock. These are N4A701 and 02 for proposal 7425, and U482B2, B3, B4, AQ, AR, AU, AV, AY, and AZ for parallel proposal 7786.