STScI Logo

Other Properties

GHRS Instrument Handbook

In Cycle 5 we expect to obtain observations to determine more precisely the Point Spread Function (PSF) at the GHRS apertures and the degree of image motion in the apertures over the course of an HST orbit. For Cycle 6 we anticipate doing no more than a minimal monitoring program, which should be adequate to ensure the quality of the archival data for the GHRS.