Dear EME Friends,
A month ago I mentioned here a piece of SDR software that I
have been working on, tentatively called MAP65. Many people
have written to ask for more details. I have consequently
placed a status report and a MAP65 screen shot on the WSJT
web site. Links to them are given below.
Very briefly:
MAP65 is the "back end" of a a wideband receiver optimized
for JT65 signals. It works together with Linrad and
suitable RF hardware to provide automatic
polarization-matched reception of all detectable JT65
signals in a 90 kHz passband, in real time. The program
runs under both Windows and Linux. In the future it will
probably work with Winrad, as well as Linrad.
The present state of MAP65 can be judged from the screen
shot, which was produced by processing 10 minutes of data
recorded on November 11, during the second weekend of the
ARRL EME contest. In those 10 minutes, MAP65 decodes nearly
50 callsigns of EME stations operating between 144.100 and
144.160. My EME antenna at the time was a pair of 2MXP20 yagis.
MAP65 has not yet been used "on the air". My EME antenna
was taken down just after the 2006 ARRL contest, and its
replacement will not be erected until warmer weather arrives.
The MAP65 Status Report and Screen Shot can be found at:
http://pulsar.princeton.edu/~joe/K1JT/MAP65_Status.txt
http://pulsar.princeton.edu/~joe/K1JT/MAP65_1.JPG
Like WSJT, MAP65 will be "Open Source" software. I hope
that these small tidbits of information will entice some
others to participate in the program's development.
With best wishes to all,
-- 73, Joe, K1JT
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