MRO in glitch mode |
MRO in glitch mode |
Feb 26 2009, 07:17 PM
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#1
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
Mars Orbiter Glitch Stalls Red Planet Science
By Tariq Malik http://www.space.com/missionlaunches/09022...alfunction.html -------------------- CLA CLL
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Nov 8 2009, 10:33 AM
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#2
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
It's fairly clear - there's no 'reading into' requried. It make far more sense to schedule downlink via MRO.
It frees up MODY (as it's downlink is much lower than MRO) It''s an accounting error in terms of MRO downlink It's going to be on the ground faster with MRO Thus it opens up a bit of extra sequence planning time. DOWNSIDE - the passes are earlier in the afternoon, so less time for rover activities before stopping for the day. (But part of me wonders why they can't just start earlier - the generated power during the day will still be the same - maybe it's a heater requirement thing starting too early) Comparing http://descanso.jpl.nasa.gov/DPSummary/odyssey_telecom.pdf and http://descanso.jpl.nasa.gov/DPSummary/MRO_092106.pdf MODY is between 28,440 b/s and 110,600 b/s for 70-m passes, and between 3,950 b/s and 110,600 b/s for 34-m passes. MRO starts at 500kbps on 34-m passes at the furthest distance from Earth - and goes up to 2.6Mbps on 34 and 6Mbps on 70-m at closest approach. |
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