[amsat-bb] Re: Is it 100% impossible to work a satellite below the horizon?
At 07:13 AM 3/13/2011 -0700, n...@yahoo.com wrote: I seriously doubt that satellites using 2 meters and higher frequencies for uplink/downlink would show much (if any) below the horizon capability. Bob NA2X It's possible to happen on 2 meters via satellite too. In the early 90's I submitted proposals for Sarex contacts to NASA and was selected for two schools in the area, STS-56. The day before I set up my oscar station at the high school where the contacts would take place. Antenna was a ten element RCHP cross yagi steerable on the school roof. The morning contacts were to happen the weather was really weird, we had a spring snow storm go through, and I'm sure there must have been ducts of cold and warm air and inversions. Another Amsat member Chris, KF7KN helped and we double checked each other work, we didn't want any mistakes. During the sarex pass for the first school, we were still communicating with the astronauts for about 25 seconds after LOS. I have the whole thing on video. It didn't happen again the second pass, the weather was more normal. Back in those days, when you were scheduled for a contact, NASA faxed the latest keps for the shuttle. The element set we got faxed was less than an hour old, and they even faxed us a new set for the next pass. Hee Hee, freshest set of keps I ever got. KB7ADL ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Is it 100% impossible to work a satellite below the horizon?
I work in radar and have seen radar go over the horizon Sent from my iPhone Andrew Rich On 13/03/2011, at 10:25, Bill Dzurilla billdz@yahoo.com wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? 73, Bill NZ5N ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Is it 100% impossible to work a satellite below the horizon?
Hello Bill, Simple answer is YES. The RS series were good examples. I am sure I have done it on FMsats. Enhanced propagation can extend your range both before normal AOS and beyond LOS. Most programs seem to only use line of sight (LOS) Az/El settings. One difficulty is that satellite programs may not give you info on where you could talk to, for negative elevations. Only positive elevations. I would like to see tracking programs that could give me info for -10 degrees, not to track in elevation, but to track in azimuth. One way to make that elusive DX QSO. Stan, W1LE Cape Cod FN41sr On 3/12/2011 7:25 PM, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? 73, Bill NZ5N ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Is it 100% impossible to work a satellite below the horizon?
It's quite common. On 13-Mar-11 00:25, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? 73, Bill NZ5N ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Is it 100% impossible to work a satellite below the horizon?
On 3/12/2011 7:25 PM, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? It was relatively commonplace with RS-12 on Mode K, 15m up, 10m down. There was one guy in North Carolina I think that worked dxcc on RS-12/13. He was my first satellite QSO in 1992 or so, and was always on. I can't remember the call, but it was a 1x2 I think. I imagine it would be at least possible on other birds and higher bands with strong tropo. Jerry, KK5YY told me about doing that on AO-27 or UO-14 from Alaska over the ocean. I've not experienced it though. 73, Drew KO4MA ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
