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Space Shuttle Avionics: Difference between revisions
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→ORBIT TGT (SPEC 34)
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The display allows to compute a sequence of two OMS burns (T1 and T2) that will bring the Shuttle close to a target such that rendezvous navigation (SPEC 33) can be used (the difference being that SPEC 34 assumes you are far from the target and orbital mechanics effects are important to reach it, while SPEC 33 assumes you are so close to the target that translational RCS burns are all that is needed). | The display allows to compute a sequence of two OMS burns (T1 and T2) that will bring the Shuttle close to a target such that rendezvous navigation (SPEC 33) can be used (the difference being that SPEC 34 assumes you are far from the target and orbital mechanics effects are important to reach it, while SPEC 33 assumes you are so close to the target that translational RCS burns are all that is needed). | ||
In addition, in the lower right corner, the current state vector of the Shuttle as known by the avionics is displayed. | |||
As of June 2016, the implementation in FG supports a quasi-Hohmann transfer computation. From a lower, reasonably circular orbit, item 28 calls a numerical trajectory solver which fits burn parameters to reach the target. The results are stored as PEG-7 targets and can directly be used in the MNVR display. Most other options to tweak the T1 and T2 targets are currently not supported. | As of June 2016, the implementation in FG supports a quasi-Hohmann transfer computation. From a lower, reasonably circular orbit, item 28 calls a numerical trajectory solver which fits burn parameters to reach the target. The results are stored as PEG-7 targets and can directly be used in the MNVR display. Most other options to tweak the T1 and T2 targets are currently not supported. | ||