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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. | ||
=== REL NAV (SPEC 33) === | |||
[[File:Shuttle avionics spec33.jpg|600px|REL NAV display of the Space Shuttle]] | |||
The REL NAV display is used for rendezvous and proximity operations to snow the relative position to a rendezvous target. It's a fairly complicated display which requires some knowledge on the theory of space navigation and state vector management to properly understand and operate. | |||
Assuming idea navigation, only the column of numbers below SV SEL are important, where range, approach rate, angular orientation, displacement along the angular momentum axis of the target and approach rate along the angular momentum axis (assumed to be the desired docking direction) is shown. | |||
The rest of the display is used if the state vectors of Shuttle and target are not perfectly known and have errors. In this case, radar ranging (RR) can be used to directly measure distance and approach rate and various filters based on other sensors can be utilized to improve upon the computed state vector. | |||
Many options are at least semi-quantitatively implemented in FG, i.e. filters will show residuals which allow to gauge their quality and can be used to update the state vectors, but there's no real simulation of the filter matrix done, the simulation just assigns a filter quality measuring how close to the true state of the craft a filter leads. | |||
=== OVERRIDE (SPEC 51) === | === OVERRIDE (SPEC 51) === | ||