Ham detects signal from Voyager-1 (14698000000Km) |
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Ham detects signal from Voyager-1 (14698000000Km) |
 Apr 15 2006, 07:26 PM
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#1
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Newbie  Group: Members Posts: 12 Joined: 20-January 06 From: io80xr Member No.: 651  |
Hi folks,
Luis CT1DMK who is a fellow amateur-DSN station has sucessfully detected a carrier from Voyager-1 which is a long way from earth, about 14698000000Km. He's made a nice write up on his site at http://w3ref.cfn.ist.utl.pt/cupido/dsn.html which apart from Voyager has info on other DSN space-craft received. Regards Paul www.uhf-satcom.com -------------------- Paul Marsh - ham callsign = M0EYT Contributor to www.uhf-satcom.com |
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Apr 15 2006, 08:51 PM
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#2
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 Member Group: Members Posts: 531 Joined: 24-August 05 Member No.: 471 |
With a 5.6m dish! Wow!
Greets to Portugal. -------------------- - blue_scape / Nico -
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Apr 15 2006, 09:55 PM
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#3
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 Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
-------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Apr 19 2006, 03:13 PM
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#4
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Newbie Group: Members Posts: 12 Joined: 20-January 06 From: io80xr Member No.: 651 |
QUOTE (ljk4-1 @ Apr 15 2006, 10:55 PM)  Hi, yeah that thread is on the rx effort by the Bochum guys on the 1st April using their 20m dish which has a lot more gain thank the 'smaller' 5.6m dish of Luis CT1DMK. regards, Paul. -------------------- Paul Marsh - ham callsign = M0EYT Contributor to www.uhf-satcom.com |
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Apr 19 2006, 04:03 PM
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#5
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Member Group: Members Posts: 624 Joined: 10-August 05 Member No.: 460 |
QUOTE (pjm @ Apr 15 2006, 01:26 PM) Hi folks, Luis CT1DMK who is a fellow amateur-DSN station has sucessfully detected a carrier from Voyager-1 which is a long way from earth, about 14698000000Km. He's made a nice write up on his site at http://w3ref.cfn.ist.utl.pt/cupido/dsn.html which apart from Voyager has info on other DSN space-craft received. Regards Paul www.uhf-satcom.com I vote that we turn this dude loose on a VLA and see what he can stir up from the Pioneer probes! |
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Apr 20 2006, 09:18 AM
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#6
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
The pioneer probes aren't talking, that's the problem. From what I gather, the power supply voltage got so low on Pioneer 10 that it needed an uplink signal to "excite" the frequency linked transmitter in some way to "arouse" it enough to trigger transmission the last time<s?> they contacted it, and the voltage is so low now that's not enough, or something else has failed or won't respond due to low voltage.
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Apr 20 2006, 12:53 PM
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#7
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Member Group: Members Posts: 624 Joined: 10-August 05 Member No.: 460 |
QUOTE (edstrick @ Apr 20 2006, 03:18 AM) The pioneer probes aren't talking, that's the problem. From what I gather, the power supply voltage got so low on Pioneer 10 that it needed an uplink signal to "excite" the frequency linked transmitter in some way to "arouse" it enough to trigger transmission the last time<s?> they contacted it, and the voltage is so low now that's not enough, or something else has failed or won't respond due to low voltage. The Pioneer craft use a phase-locked loop for Doppler signal responding: This is the lowest power communication mode, and you are correct, it is the only one that could possibly work. The PLL design allowed the use of Earth-based clocks to clock the signal generated by the craft, which could not have been outfitted with a clock accurate enough to detect the anomally. |
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