Focus Calibration Program

Details Focus Calibration Program Focus Calibration Program

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8803g&link_type=abstract

HST Proposal ID #8803

Physics

Hst Proposal Id #8803

Scientific paper

The HST focus drifts slowly and perhaps undergoes slips of a few microns at random times. Focus monitoring programs can provide evidence of a likely problem with the focus, but do not provide sufficient data upon which to act in a short period of time. This two orbit program obtains a large amount of high signal to noise focus data sufficient for accurately defining the HST focus. This is a test version of a program to execute before the target, M35 goes into the Sun on 2 May 2000. The Cycle 9 version of this program will be structured as a ToO to be executed as needed perhaps once or twice a year with ~3 week warning.

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