I've scheduled more observations on the ITR ground station, which is not usually schedulable by most SatNOGS users (the station is in testing).
The ITR station is using a large ZCG-Scalar Cross-Yagi, phased for RHCP. Gain is approx 14 dBd. A picture of the station is here: https://network-satnogs.freetls.fastly.net/media/ground_stations/20170911_14... Worth noting that only one of those cross-yagis is hooked up at the moment.
73 Mark VK5QI
On Fri, Jul 23, 2021 at 2:46 AM Chris Thompson [email protected] wrote:
As Burns said, we have definite reports of the telemetry signal from AO-109. Many thanks to Ken Swaggart W7KKE who captured a visible signal at his Satnogs station https://network.satnogs.org/observations/4084669/ and to Mark Jessop VK5QI who supplied the first recording where data was confirmed https://network.satnogs.org/observations/4453728/. It was recorded at the Satnogs ground station at the Institute for Telecommunication Research (ITR), University of South Australia.
But, let me remind everyone that the prize and glory for receiving and decoding the first telemetry is still available. I could partially decode the data that Mark supplied by turning off the Forward Error Correction and decoding the bytes between the sync words - errors and all. It is quite a challenge to receive decodable frames but it is surely possible. See if you can be the first to post decoded frames. If you are not set up to decode frames but have a good recording, then send it to me and I will attempt to decode it. The prize will be yours all the same.
As an example, the ITR waterfall is just not quite decodable: https://network.satnogs.org/observations/4453728/. But it is close. If you can do better than that then the prize could be yours.
73 Chris AC2CZ / G0KLA
On Wed, Jul 21, 2021 at 9:40 AM Burns Fisher [email protected] wrote:
I guess our friend AO-109 must have been just waiting for us to open it up for amateur use before sending some telemetry :-)
Seriously, thanks to SatNogs, we found some telemetry that was recorded on May 10 just after we cranked up the modulator gain. In addition, a SatNogs observation today, July 21, also shows signs of weak telemetry.
We'd appreciate it if anyone who has a station that can receive telemetry, especially stations with good gain and tracking ability, could listen for AO-109 telemetry on 435.750. If FoxTelem is all you have that's great, but if you also have some way to capture the signal in a file (say IQ recording in HDSDR) that would be even better. Chances are the signal is weak enough that it might need some teasing by our experts before we can get any info out of it.
I'll also schedule some SatNogs observations, and anyone who has a SatNogs station with similar characteristics (gain antenna etc), please schedule some of your own over the next few days!
Thanks and 73,
Burns Fisher WB1FJ AMSAT Flight Software
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-- Chris E. Thompson [email protected] [email protected]
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