TiME |
TiME |
May 5 2011, 08:48 PM
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#1
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Member Group: Members Posts: 613 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
Ahoy mateys!
NASA announces Discovery mission selection for Phase A. Titan Mare Explorer (TiME) is among them. Har! |
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May 15 2011, 09:11 PM
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#2
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
Just because TiME will use an ASRG (or two) does not necessarily mean more power than a solar-powered soacecraft. It is independent of distance from Sun. But then it will also be at Saturn distance, not quite as far as NH will be, but still much farther out than MER. As with solar flux, comm power goes down by inverse square of distance, and TiME will not have a big high gain antenna. To a first order, my guess is TiME comm bandwidth will be an order of magnitude less than that of Cassini.
Since it will be out of line of sight to Earth for at least half of Titan's orbit, TiME may use rechargeable batteries to increase peak power during the times it can transmit to Earth similar to MSL for driving. |
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May 16 2011, 02:16 PM
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#3
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
...Since it will be out of line of sight to Earth for at least half of Titan's orbit, TiME may use rechargeable batteries to increase peak power during the times it can transmit to Earth... Maybe out of sight less than half Titan's orbit. How long would Titan actually be behind Saturn, or close enough to prevent communication? |
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