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

Rick Tejera saguaroastro at cox.net
Wed Sep 23 05:32:33 UTC 2015


A JA op posted a screen shot of LilacSat-2 on the AMSAT Facebook page, he
too was down around 437.191, so it does appear to be quite a bit lower. I
did notice the quick doppler change, especially near the zenith.

I'll give it a go on the D72a, if that proves unworkable, I'll set up the
Icom IC-7000 & HDSDR and see how that goes. 

I'm currently working on a pair of Crossed Moxons so I don't have to lug
gear outside all the time. I'll add the AMSAT preamp, and hopefully that'll
hold me until I can afford the M2 Leo pack.

Not sure when I'll ahve the time, but now that it's cooling off, we need to
get together so you can elmer me on the fine art of working the linear

Rick Tejera (K7TEJ)
Saguaro Astronomy Club
Thunderbird Radio Club
623-203-4121 (cell)
SaguaroaAstro at cox.net

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Patrick
Sent: Tuesday, September 22, 2015 9:46 PM
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] LilacSat-2 over Central US 2340z

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
> 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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