Author Topic: LIVE: STS-124 Flight Day 15 (EOM) - Deobit, Re-Entry and Landing (Read 105557 times)

Andy_Small · « **Reply #80 on:** 06/14/2008 01:53 pm »

Standing by for APU start

Moonbase_Alphan · « **Reply #81 on:** 06/14/2008 01:54 pm »

Quote from: kneecaps on 06/14/2008 01:39 pm

You don't happen to have the Delta positions and velocities or even the new SV itself do you?

yes. I can PM you later, as it's getting a bit busy around here right now.

Andy_Small · « **Reply #82 on:** 06/14/2008 01:55 pm »

in proper orientation for burn

Less than 15 mins away

kneecaps · « **Reply #83 on:** 06/14/2008 01:58 pm »

Deorbit burn is 2:34 seconds long using both OMS engines for a Delta V of about 285 fps (by my crude calculations).

Chris Bergin · « **Reply #84 on:** 06/14/2008 02:00 pm »

10 minutes to the deorbit burn. Someone needs to wake up at NASA TV and give us more than the long shot.

Ford Mustang · « **Reply #85 on:** 06/14/2008 02:01 pm »

1 hour and 14 minutes from touchdown at the Kennedy Space Center.

kneecaps · « **Reply #86 on:** 06/14/2008 02:05 pm »

At TIG -15 seconds EXEC will flash on the maneuver display. Commander Kelly will have to press the EXEC key on the keyboard to enable the burn.

The ADI (Attitude Error Needles) on the FDAI (8-ball) will be monitored to ensure that no OMS engine or gimbal failures have taken place.

The OMS engine Pc (combustion chamber pressures) will also be monitored to ensure correct operation.

Ford Mustang · « **Reply #87 on:** 06/14/2008 02:05 pm »

5 minutes from the De-Orbit Burn.

Ford Mustang · « **Reply #88 on:** 06/14/2008 02:06 pm »

APU 2 up and running, things looking good.

Chris Bergin · « **Reply #89 on:** 06/14/2008 02:06 pm »

Here's what the deorbit burn is like onboard (clipped from one of the L2 re-entry videos):

http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=4813.0;attach=20505

Bruce · « **Reply #90 on:** 06/14/2008 02:08 pm »

Quote from: kneecaps on 06/14/2008 01:58 pm

Deorbit burn is 2:34 seconds long using both OMS engines for a Delta V of about 285 fps (by my crude calculations).

289 fps, according to PAO. 192 MPH. Not a big % change in velocity. Obviously just enough to drop out of orbit though.

Ford Mustang · « **Reply #91 on:** 06/14/2008 02:08 pm »

Discovery is in a good config for the burn!

ShuttleDiscovery · « **Reply #92 on:** 06/14/2008 02:09 pm »

The shuttle now passing over Malaysia.

Paul Howard · « **Reply #93 on:** 06/14/2008 02:09 pm »

Quote from: Chris Bergin on 06/14/2008 02:06 pm

Here's what the deorbit burn is like onboard (clipped from one of the L2 re-entry videos):

http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=4813.0;attach=20505

Thank you Chris! (my request

)

Ford Mustang · « **Reply #94 on:** 06/14/2008 02:10 pm »

De-Orbit Burn now underway.

kneecaps · « **Reply #95 on:** 06/14/2008 02:10 pm »

Quote from: Bruce on 06/14/2008 02:08 pm

Quote from: kneecaps on 06/14/2008 01:58 pm
Deorbit burn is 2:34 seconds long using both OMS engines for a Delta V of about 285 fps (by my crude calculations).

289 fps, according to PAO. 192 MPH. Not a big % change in velocity. Obviously just enough to drop out of orbit though.

PAO is taking 289 from the automated pad..the actual burn is 2 seconds shorter than what was on the automated pad.

The aim of the deorbit burn is to hit the atmosphere at a certain point so the atmosphere 'captures' you and slows you down.

Ford Mustang · « **Reply #96 on:** 06/14/2008 02:11 pm »

2 good OMS engines (excellent news!), Discovery now on her way home to KSC.

Ford Mustang · « **Reply #97 on:** 06/14/2008 02:13 pm »

The De-Orbit Burn for STS-124 is now complete. No trim required.

Chris Bergin · « **Reply #98 on:** 06/14/2008 02:13 pm »

Good burn, no trim required. Excellent. Safe journey home Discovery.

kneecaps · « **Reply #99 on:** 06/14/2008 02:14 pm »

The criteria for trimming in Z and X axis is 2fps...as we heard no trim required VGOs must be within those limits.