- Oct 26, 2011
- Reaction score
The braking phase is done in attitude hold mode, so you don't change your attitude anymore. And you correct your approach with the TTCA, so translation mode. With the Rate Err Mon switch in the RR position the FDAI shows the RR angles on the error needles and the cross pointer shows the trunnion and shaft rates at which the RR is currently tracking the CSM. Those displays are a really good aid in staying on course. The goal is to keep the needles centered, which means that the RR is pointing directly forward to keep tracking the CSM and that is how you want to approach the CSM. Just do some translational burst and see what it does to the needles on cross pointer and FDAI. Takes a bit of practice but it works really well. And of course once you get to the braking gates look at your range rate and reduce it to the amount required at that gate.