Other
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.4815t&link_type=abstract
HST Proposal ID #4815
Other
Hst Proposal Id #4815
Scientific paper
This proposal describes the activities needed to deploy the Deployable Optical Bench (DOB) from its stowed position to its operational position and verify that the deployment will not cause damage to the other instruments. The deployment of the DOB is done in two stages in order to prevent contact between the FOS M2 mirror arm and the other structures within the Hub region. If the DOB was deployed directly to the operational position, the FOS M2 mirror could not be deployed safely. An intermediate position is used to allow the arm to clear both the COSTAR enclosure and the other structures within the Hub region. As it is critical that the arm be completely deployed before moving the DOB to the operational position, a set of check images are taken with the FOS just before and after the arm deployment. If the deployment was successful, the FOS will show no signal in the after image. This proposal requires a mix of real-time activities performed by the STOCC and stored command activities performed by the STScI SMS. The implementation of this proposal requires careful attention to the implementation details as deployment of the FOS M2 mirror could result in physical damage to the HST instruments as defined in the CARD.
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