[amsat-bb] LilacSat-2 over Central US 2340z

Patrick STODDARD (WD9EWK/VA7EWK) amsat-bb at wd9ewk.net
Wed Sep 23 04:45:56 UTC 2015

Hi Rick!

You should be ready for a downlink lower than what was
published. Glenn AA5PK and I were giving each other our
downlink frequencies late in the pass, so we could
compare where we were listening. If you didn't have more
than HT power (5W), you may have also had issues getting
through. Hopefully the FM transponder stays on, as these
lower passes compared to other satellites only leave me
one workable pass per late afternoon. If only these
satellites were launched 60 or 90 mimutes later...

As for the uplink frequency and where it falls in various
bandplans, Arizona - like the ARRL's 2m band plan - appears
to be the exception to the "rule" that nobody recognizes
anything more than 145.800-146.000 MHz for satellite
operation. I saw this page from the Amateur Radio Council
of Arizona, which is the coordinator in Arizona, for the
2m band plan:


Other than the APRS and AM calling/net frequencies, this is
one of the rare cases where amateur satellite operation is
actually recognized in a local band plan for this part of
the 2m band.

Since LilacSat-2, like most of the others launched over the
weekend, didn't receive IARU frequency coordination - it
won't be eligible for an OSCAR number. A shame, but I
understand the rationale for that. Just give a quick listen
on the 144.350 MHz frequency before transmitting, to make
sure you don't interfere with anyone else who might be
there, before working these passes. And be ready to adjust
the downlink quicker than you do with SO-50.


Twitter: @WD9EWK

> I saw the message about the FM transponder being on around the middle of
> the pass, by the time I got my gear out and set up on the VFO (frequencies
> now in memory) the bird was about 20 degree from LOS. Since I operate from
> the backyard of my North facing house, it was down near the rooftops. I did
> throw my call out, but did not hear the downlink. based on your report, I
> was probably too high. I won't be available tomorrow or Thursday to try
> again, maybe Friday. My Schedule is starting to ramp up with theater
> season....
> As for the choice of uplink, Here in AZ 144.410mhz has become the defacto
> Fm simplex frequency for SOTA (Summits on the Air). So dredging up a
> discussion from a few weeks back about the choice of frequency, It appears
> that the IARU will not coordinate these frequencies, so does that mean
> these birds will not receive OSCAR numbers?

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