Guide Star Acquisition Verification

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Scientific paper

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Hst Proposal Id #8994

Scientific paper

After the shuttle deploys HST at the end of SM3B and at the beginning of SMOV3B, it will be necessary to test and demonstrate HST's ability to acquire guide stars with the FGSs. This is a major pre-requisite for all observations by HST's SIs when precision pointing under guide star control is needed. This proposal will test the ability of each of the three FGSs to acquire a primary guide star while another FGS acquires a secondary guide star. After acquiring a guide star pair, HST will track these stars in finelock for approximately 10 minutes. For a given FGS with a primary guide star, it does not matter which of the two other FGSs is used for the secondary star. This decision should be based upon guide star pair availabilty for a given HST pointing. When possible, use guide stars that have been successfully acquired and tracked in the past.

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