Peter D. Hyde, Richard Perrine(CSC, Kenneth Steuerman
STScI
The Observatory Monitoring System (OMS) is part of the Hubble Space Telescope (HST) ground system at Space Telescope Science Institute in Baltimore, Maryland. OMS receives as inputs a file of commands for the HST and files of engineering telemetry data generated by the HST in response to those commands. This paper will discuss how, from its inputs, OMS software computes spacecraft jitter during the observations commanded in the input. It will also describe the jitter products distributed to the observer. Analysis of these jitter files helps astronomers assess the quality of science data obtained during their observations; keyword values in the image header for an observation summarize valuable information about that observation, possibly including abnormal conditions.