Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990hst..prop.1507p&link_type=abstract
HST Proposal ID #1507
Physics
Hst Proposal Id #1507
Scientific paper
The objective of this test is to determine the optimum setting of the FOC refocusing mechanism, using a rich star field. The procedure will be performed once at the beginning of the observing period. Two filters of different thickness are used. At later stages of SV the test is reduced in length. Each focus procedure will require 10 minutes per filter per mode of on-target time.
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