[amsat-bb] LilacSat-2 & LOTW

Ted k7trkradio at charter.net
Tue Sep 29 21:31:52 UTC 2015

Hi Patrick, do we know if LOTW has been advised to add the new crop of sats?

73, Ted

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Patrick
Sent: Monday, September 28, 2015 10:31 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] LilacSat-2 pass @ 0147 UTC tonight (29 September)


There was a nice turnout on the 0147 UTC LilacSat-2 pass over the US west
coast. Stations up and down the coast, and as far east as west Texas, were
on. Unlike with the first QSO I made on this satellite last week, when it
was raining very hard on my operating position in the yard, I was able to
have a nice and calm evening.

I used my Icom IC-2820H 2m/70cm FM mobile radio for my uplink transmitter,
and an SDR setup for the downlink receiver - SDRplay SDR receiver, 8-inch
Windows 10 tablet with HDSDR software - to operate full-duplex. I connected
both of these through a diplexer to my Elk log periodic. I used HDSDR to
make an RF recording of both downlinks - the FM repeater downlink around
437.200 MHz, and the digital telemetry downlink around 437.225 MHz. I think
I had a better copy on the 437.225 MHz downlink tonight than over the
weekend, and logged 6 contacts on the FM repeater.

Last week, when I worked Glenn AA5PK, I was not able to get through with
anything less than 50W transmit power. Tonight was not as bad, but I found
that I couldn't get away with 5W for more than a few transmissions. The
mid-power setting from my IC-2820H, 15W, worked better. High power (50W)
worked well, too. None of these power levels desensed my SDRplay receiver.
Maybe if the satellite was higher in the sky, and closer to passing over my
head, I might have had better luck using the 5W power level. I saw a mixed
reaction on Twitter - one reported needing to run 50W, and someone else said
5W was sufficient.

Rather than posting the long and nasty URLs used by Dropbox for its public
folders, I made a shorter URL that can take you to the recordings and other
files I have been posting in my public Dropbox space:


For tonight's LilacSat-2 pass, look for the folder with the name
"20150929-LilacSat2". If you have an SDR program on your computer or device,
and have the bandwidth to download the RF recording, download the WAV file
with the name starting with "HDSDR_20150929" in that folder. I also have an
MP3 recording with the audio I heard during the pass, plus photos of my back
yard setup and a screengrab from my phone's tracking app to show how the
pass was for me in central Arizona.

Late last week, I made a one-page graphic with a quick-reference guide for
the LilacSat-2 FM repeater. I now have this graphic at its own URL:


Please feel free to right-click on the graphic and save it to your

This pass was the 3rd consecutive pass where LilacSat-2's FM repeater was
operational over the continental USA. It was nice to see the reports from
the two earlier passes, and then to work it for myself on the third pass.
Thanks to the LilacSat-2 team for another FM satellite for us!


Twitter: @WD9EWK
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