MTO Cancelled |
MTO Cancelled |
Jul 21 2005, 06:30 PM
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
Just listening to the MRO conference. Highlights included...
1) 5.4 Mbits is the highest MRO data rate (not the 4 I thought) 2) An extra 50-ish KG of fuel puts it's low-altitude orbit life thru to the next decade. 3) MTO HAS BEEN CANCELLED What the HELL! They say that MSL can still do its mission with just MRO as it's relay capacity will suffice. But that means less science data during an MRO extension Seems a bit short sighted. Doug |
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Feb 28 2007, 07:06 PM
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Member Group: Members Posts: 234 Joined: 8-May 05 Member No.: 381 |
nprev, this is an abstract in its entirety from SPIE publication "Free-Space Laser Communications Technologies XVIII", published Feb. 2006:
MARS LASER COMMUNICATION DEMONSTRATION: WHAT IT WOULD HAVE BEEN The Mars Laser Communications Demonstration Project completed a preliminary system design for sending data at 1-30MBPS from a spacecraft orbiting Mars. The flight transceiver diameter was 30.6 cm, transmitting 5 W average laser power at 1064 nm and using 32- and 64-ary pulse position modulation (PPM). A ground network comprised of two receive terminals (5-m and 1.6-m effective diameter) and two transmit terminals for sending 1076 nm lasers would have been used to communicate with the transceiver. This is the experiment that would have been on the 2009 MTO spacecraft. BTW, the abstract is free, but the technical paper would cost $18 - $20. |
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