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August 11th 04, 08:59 PM
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In article , Mike Coslo writes:
Leo wrote: On 10 Aug 2004 03:16:20 GMT, (Len Over 21) wrote: In article , Leo writes: On 09 Aug 2004 23:45:24 GMT, (Len Over 21) wrote: In article , (N2EY) writes: (N2EY) wrote in message ... In article , Robert Casey writes: Okay, now what is the PATH LOSS and what kind of Tx power is needed at each end for a given S:N ratio? Can you get by on amateur radio power levels? Without violating any of the regulations? How about Doppler Shift? How much? Betcha there gonna be chicken sounds on that...no answer. :-) So far, you could hear a pin drop....... Tell us what the path loss and and Power for a given S/N ratio is. Pick a position and date for that position and tell us. It doesn't work that way, Mike. I posed the challenge and it's up to others to answer...such as yourself. All the information is available to YOU. Won't take much searching to find it. No need for Keplerian tables or that other BS about "picking a position" since all you need is the MAXIMUM distance for path loss. Or, you can cheat and crib from NASA information. They've been in the interplanetary communications business for over three decades. Theoretical information is even older, and still accurate. Tell us what the Doppler shift is over the length of a short QSO, starting at the time of of start Assume a DX style QSO with a short feedback message to insure actual reception on both ends, say a 35 second transmission. Then the same for the return message. Illogical premise. Interplanetary QSOs have such long round-trip times that your paradigm isn't worth 20 cents. Think about it. Doppler shift isn't a big problem. RF power output IS. Think about that...no ionosphere in between planets, nothing else like it. At this time I don't know those details, but I'll be happy to check them out once you've posted them. Add anything I have forgotten but may need to know. Sorry, Mike. It's up to YOU and the other latter-day saints of see- double-yew to take the first shot. You are NOT the range officer in this shooting gallery. If you can't do it, well, you can't do it. No problem to me. :-) |
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