On Sun, Feb 6, 2011 at 12:36 PM, Iain Young, G7III <[email protected]> wrote: > Hi All, > > Just a quick clarification needed by me on the Telemetry format that is > going to be used by ARISSat-1 and Funcube (& I guess the Funcube boards > onboard UKube-1...) > > Lots of places are referring to it as BPSK1000, but I have seen > references claiming it is DBPSK. Can someone clarify if it is > Differential BPSK, or "just" plain old BPSK as used before, but at 1000 > BPS, rather than 400 ? > > Reason for asking is that I have a USRP, and use gnuradio, along with > the gnuradio-companion. That has DBPSK blocks built in, but pure BPSK > would take a little more work (possibly just routing the output to a > loopback soundcard, and then running decoding software) >
Hi Iain, It is differentially encoded. You can find the specification on Phil KA9Q's website: http://www.ka9q.net/bpsk1000.html He has also made his reference modem available under GPL: http://www.ka9q.net/demod2.tar.bz2 The package contains functional application that can send and receive BPSK1000. What I am still missing is description of the telemetry format, i.e. how to translate the decoded data stream into engineering values. Is there such a document available? 73 Alex OZ9AEC _______________________________________________ Sent via [email protected]. 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
