Sol 12 on onward general imaging, First TEGA delivery |
Sol 12 on onward general imaging, First TEGA delivery |
Jun 7 2008, 09:01 AM
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#1
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
Looks like the Sol 12 images are coming down
http://phoenix.lpl.arizona.edu/images.php?...3286&cID=50 Motion in the scoop for sure, so hopefully a full delivery will be imaged...in full. |
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Jun 11 2008, 10:34 AM
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#2
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Interesting to look at the Phoenix Data Archive Plan:
QUOTE For planning purposes, the expected downlinked data volume from Phoenix is at least 50 megabits per sol via UHF during the primary mission, and about 25 megabits per sol during the extended mission. Under the best circumstances the UHF link could provide a data rate between 100 and 150 megabits per sol. At 50 Mb/sol, the total downlink volume for the 90-sol primary mission would be 3,950.88 megabits (493.86 megabytes or about half a gigabyte) of compressed data. At a nominal 50Mb/sol (~6MB/sol), or even three times that under the "best circumstances," if it had a 1GB memory, what would it do with it? The MERs were planned for about 4 times more downlinked data each for the primary mission (also 90 sols): QUOTE For planning purposes, the total downlinked data volume from both rovers is estimated at approximately 4 Gigabytes for the primary mission, based on sample mission scenarios.
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Jun 11 2008, 11:36 AM
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#3
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Junior Member Group: Members Posts: 57 Joined: 6-September 07 From: Netherlands Member No.: 3683 |
The MERs were planned for about 4 times more downlinked data each for the primary mission (also 90 sols): Now that we get MPL and Exomars in a few years this get's me thinking in what timeframe we have use for a dedicated telecom orbiter or a science orbiter with higher bandwidth. Especially since the three we have are somewhat aged by that time. -------------------- Error: Life.sys corrupted
( R )eflect, ( R )epend, or ( R )eboot? |
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Jun 11 2008, 12:58 PM
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#4
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Now that we get MPL and Exomars in a few years this get's me thinking in what timeframe we have use for a dedicated telecom orbiter or a science orbiter with higher bandwidth. Especially since the three we have are somewhat aged by that time. Check out Relay Communications Strategies for Mars Exploration Through 2020. The bottom line in that paper is that with the cancellation of the Mars Telecommunications Orbiter, "second decade" Mars communications will rely on combination science/relay oribters like MRO, using the same radio as the latter, the Electra software-defined UHF radio. That radio supports up to 1 Mbps from landers. MRO can transmit back to Earth at 600Kbps-5Mbps depending on Earth-Mars distance, DSN facility used, etc. -------------------- |
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Jun 11 2008, 01:59 PM
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#5
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
The advantage would be in being able to take a full panorama in a short number of sols to minimize the effects of changing sun angles and any surface changes between frames. Not huge, and not worth risking the mission with unproven memory, but still an issue. With regard to MER panoramas, the obvious advantage would be to take the whole pan at once and roll away, transmitting it as time permits.
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