Mro On Approach, TCM-3 not required |
Mro On Approach, TCM-3 not required |
Feb 3 2006, 11:06 PM
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#1
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Member Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 |
MRO has shifted from the cruise phase to Approach phase. Apparently, the trajectory is so good that TCM-3 was cancelled. This is good news for the prospects for a long life for MRO supporting future missions. TCM-4 is on Feb 28, and MOI on March 10. Only 5 weeks away!
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Feb 27 2006, 07:10 AM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
With apollo, for both orbit insertion and trans-earth-insertion burns, there were 2 important times. The times of expected AOS <acquisition of signal>times: for 1.) if the engine burn did not occur, and for 2.) If the engine burn did occur.
On orbit insertion, a no-burn signal would be early.. an improper burn later, a nominal burn at a specific time.. and an overburn or kablooie if no signal shortly after the optimum burn time. On TEI, a nominal burn gets you back into view early, as you've sped up in orbit. To some extent, the same will apply here. If AOS is within a few tens of seconds of the expected time, it's likely we're in a good orbit. |
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Feb 27 2006, 03:32 PM
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#3
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Does anyone know which DSN stations and/or other facilities will be listening for MRO's signal as it emerges from behind Mars at 22:16UTC on March 10th? Which one will likely be the first to report the signal?
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