Hi Les, N1LS Do you know the EIRP used at 1296 MHz by DJ5AR or by PA3FXB to complete the International Space Station-Bounce on 1296 MHz CW QSO using the ISS as a passive reflector ?
Thanks for the information 73" de i8CVS Domenico ----- Original Message ----- From: "Les Rayburn" <l...@highnoonfilm.com> To: "AMSAT Mailing List" <amsat-bb@amsat.org>; <v...@w6yx.stanford.edu>; "WSJT Group" <wsjtgr...@yahoogroups.com>; "Sean, KX9X Kutzko" <k...@arrl.org>; "Marshall-K5QE" <k...@k5qe.com> Sent: Monday, May 27, 2013 11:27 PM Subject: [amsat-bb] International Space Station-Bounce on 1296 MHz > Many of you may have read about the successful QSO between DJ5AR and > Jan, PA3FXB using the ISS as a > passive reflector, similar to airplane scatter or EME. > > Using EME protocols and periods of 30 seconds, they completed the QSO > using CW. This involved modifying > satellite tracking software, and compensating for the Doppler shift. You > can read details and hear audio files on > DJ5AR's blog here: > > http://www.dj5ar.de/?p=878 > > This is quite an accomplishment, but I instantly began to wonder if it > couldn't also be pulled off with much simpler > equipment using WSJT software such as FSK441 (commonly used for rapidly > moving meteor scatter QSO's). > Doppler shift would not be a problem, even with the quick moving ISS, > since the software is already optimized for > short transmission periods. > > It might be necessary to modify the standard messaging to allow for a > complete QSO exchange to happen faster, > or to shorten the periods to 15 seconds. > > 432 MHz has already proven to be very productive for airplane scatter, > so I also wondered if 432 might be a good > band for this type of experimentation. Lots of satellite operators are > already equipped to operate on 432 and to track > the ISS in real time with their antennas. > > I'd love to hear some discussion about the possibility of this. It could > open up a lot of potential grid squares on 432 and 1296 > simply using FSK441. > > Another problem to be solved is classifying the propagation mode in LoTW > and other logging software. Would this be considered "airplane scatter" > or would we have to invent a whole new name for this? > > Congratulations to both hams for this accomplishment! > -- > -- > 73, > > Les Rayburn, N1LF > 121 Mayfair Park > Maylene, AL 35114 > EM63nf > > 6M VUCC #1712 > AMSAT #38965 > Grid Bandits #222 > Southeastern VHF Society > Central States VHF Society Life Member > Six Club #2484 > > Active on 6 Meters thru 1296, 10GHz & Light > > _______________________________________________ > 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
