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Space Shuttle Avionics: Difference between revisions
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→DAP CONFIG (SPEC 20)
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In addition, various other options allow to (de-)select forward or aft thruster pods or to ask for compensation for mode-mixing when maneuvering. | In addition, various other options allow to (de-)select forward or aft thruster pods or to ask for compensation for mode-mixing when maneuvering. | ||
=== S TRK/COAS CNTL (SPEC 22) === | |||
[[File:Shuttle avionics spec22.jpg|600px|STRK/COAS display of the Space Shuttle]] | |||
On the star tracker / COAS control display, two of the attitude sensors of the Shuttle can be operated. | |||
The left half displays star tracker control and data and allows to select the various operation modes of the star tracker (upper half) as well as outputs the current state of the two trackers, whether a star is in the field of view, what the star ID is and what the angular deviation with respect to the database is. | |||
The upper right displays a history of the last three stars which have been tracked (the 'star table') which can serve as input for navigation calculations. | |||
The crew optical alignment system (COAS) is used when the Shuttle has drifted so much out of attitude that the tracker no longer operates correctly. It allows to select a star ID, switch the position of the COAS frame, accept a mark and forward a combination of two COAS marks for processing. | |||
All displayed fields and items except the COAS calibration are meaningful in FG, and COAS procedures can be executed for a subset of 10 stars. | |||
=== REL NAV (SPEC 33) === | === REL NAV (SPEC 33) === | ||