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Space Shuttle Navigation: Difference between revisions
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→COAS
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If you are convinced that the COAS is okay, execute item 28 to update the state vector. If you want to start from scratch, execute item 20 which clears the star table and all COAS references. Usually, the star tracker should be back in working condition after a COAS procedure. | If you are convinced that the COAS is okay, execute item 28 to update the state vector. If you want to start from scratch, execute item 20 which clears the star table and all COAS references. Usually, the star tracker should be back in working condition after a COAS procedure. | ||
== GPS == | |||
The Space Shuttle is able to receive position information from the GPS network via on-board GPS receivers. Currently, the GPS operation for the Shuttle is not very accurately modeled, GPS is assumed to be an 'always on' device characterized by a constant figure of merit, which is then used to limit the position and velocity errors in the propagated state vector. | |||