GHRS Instrument Science Report 056

"An Evaluation of the Performance of SSA ACQ/PEAKUPs"

Stephen Hulbert and Wayne Baggett

Abstract excerpted from the report:

This report examines the results of seventeen SSA ACQ/PEAKUP
observations executed between 30 June 1993 and 22 October 1993.
The SSA ACQ/PEAKUPs using MIRROR-A2 appear to be working well.
However, the ACQ/PEAKUPs with MIRROR-N2 show a systematic offset in
the final target placement that will be corrected with a change to
the PDB aperture center coordinates for this mirror.