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dilo View Member Profile	Apr 10 2005, 07:32 AM Post #1
Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150	I recall that one of the science objectives of Cassini mission during the trip to Saturn was detection of long wavelenght radiation through two-way radio link... However, in the past I often searched informations on the results without success. It is easy argue that search didn't showed clear evidence of this radiation, but I do not know if something was going wrong with experiment or was established an upper limit on intensity based on this... Can anyone could give some info/link on this item? Thanks... -------------------- I always think before posting! - Marco -

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ljk4-1 View Member Profile	Jun 6 2006, 06:27 PM Post #2
Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430	If that were the case, why would we need such ultra-sensitive instruments to detect them, and why aren't all deep spacecraft affected in a similar way? -------------------- "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

Guest_Richard Trigaux_*	Jun 7 2006, 09:08 AM Post #3
Guests	QUOTE (ljk4-1 @ Jun 6 2006, 06:27 PM) If that were the case, why would we need such ultra-sensitive instruments to detect them, and why aren't all deep spacecraft affected in a similar way? Very low frequencies, with periods of several years, would affect different spaceships, launched at different times, in a different direction or intensity. More, it seems that, in cosmological gravitationnal waves, the low frequency spectrum is in 1/f, meaning the lower the frequency the greater the amplitude. But as says Doug, it is unlikely that this amplitude would be so large as the measured Pioneer effect. But I am not sure. By the way, hello Doug.

Posts in this topic

dilo Gravitational Waves Search Apr 10 2005, 07:32 AM

cIclops QUOTE (dilo @ Apr 10 2005, 07:32 AM)I recall ... Apr 10 2005, 08:57 AM

dilo Thank you very mich, Ciclops! (hey, based on ... Apr 10 2005, 03:37 PM

The Messenger QUOTE (cIclops @ Apr 10 2005, 01:57 AM)Yes it... Aug 24 2005, 06:17 PM

ljk4-1 General Relativity and Quantum Cosmology, abstract... Jun 6 2006, 03:42 PM

Richard Trigaux Could the Pioneer effect be caused by very low fre... Jun 6 2006, 05:38 PM

ljk4-1 If that were the case, why would we need such ultr... Jun 6 2006, 06:27 PM

Richard Trigaux QUOTE (ljk4-1 @ Jun 6 2006, 06:27 PM... Jun 7 2006, 09:08 AM

djellison Because the effect is so small it's impossible... Jun 7 2006, 08:14 AM

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