Mro On Approach, TCM-3 not required |
Mro On Approach, TCM-3 not required |
Feb 3 2006, 11:06 PM
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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 21 2006, 03:27 PM
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#2
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Founder Group: Chairman Posts: 14448 Joined: 8-February 04 Member No.: 1 |
As I understand it - spacecraft are all moving very quickly in different directions, so there is dopler to worry about, and they are scheduled to listen at particular upilnk rates, and so on and so forth.
If MRO's listening to it's uplink at X bps, and it's being sent at Y Hz off the specified frequency, it may be that Spirit interprets that as a bad uplink as it was expecting W bps and is moving in a way that is Z Hz of specified wavelength. I'm fairly sure they'll be able to sequence things intelligently to sort this problem out. Doug |
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