Red Willoughby

@scott23192 Very inspiring post, Scott!

A textbook SSDV pass from SilverSat! Great SNR and a real joy to watch the image populate block by block in real-time.

@scott23192 Maybe there is a WebSDR in EU…

All -4- of the newly launched Connecta-IOT sats (13, 14, 15, 16) look good on their respective 401 MHz downlinks. Need more elevation to (hopefully) see the S-Band downlink. Need to move to EU to see the 869.525 LoRaWAN downlink!

BOTAN内部のAPRS送受信ログです。多くの方に使っていただけてます。近いうちに海外でも使えるようにしていきます。 あと、やはりISSと衛星間通信してますね！

@scott23192 Is that a passenger transmitting RF from the cabin? Or is it something akin to airplane scatter?

Do not yet have the density for a lot of 906.875 MHz RF contacts w/ Meshtastic in Central VA, but passing commercial planes show up every day or two! (most other nodes shown are via MQTT)

@scott23192 @K0FFY_Radio @n6rfm The calc says ~18” pizza pan is needed for a 420 MHz ant. The photos of Scott’s & Bob’s antennas look like they settled for a medium pie (12”) instead of a large (18”). Based on the positive performance reports, this must not be a critical parameter. Is this observation correct?

@KC4LE @K0FFY_Radio @n6rfm The final shape / size is all by hand, so a smaller initial coil works well. I've used whatever I could find... gallon paint can, compressed gas cylinder, etc.

Massive SSDV downlink from ASRTU-1 on the 2.5-turn helical omni! Only a few frames short of 100% image

@scott23192 @K0FFY_Radio @n6rfm What did you use to wind the coils on? It needs to be about 9” in diameter.

@K0FFY_Radio @KC4LE @n6rfm It’s on the calculator - at least 440 mm. Mine is Dollar Store!

@n6rfm @K0FFY_Radio @scott23192 Bob, is that for 436 MHz?

@K0FFY_Radio @scott23192 @KC4LE Adam, you will love it! From our TX QTH.

@scott23192 I am also chomping to get a dish antenna outside to experiment in the microwave bands!

@KC4LE Hey Red! No, it just sits there pointing straight up. Out performs every other antenna that I own.

@scott23192 I love that thing! You might remember that I twisted-up a couple of those units about a year ago after we discussed parameters. I’m in an antenna-difficult QTH, but I can throw one of those out in the clear and see how it does.

@scott23192 @SatNOGS LOL!!!

Great job as usual from @SatNOGS to setup the 12 (!!!) downlink modes for the upcoming CAS-11 satellite. We can always add Spark-Gap & Semaphore later if needed! #transmitters" target="_blank" rel="nofollow noopener">db.satnogs.org/satellite/DNRV…

@scott23192 @AmsatSpain Thanks for those configuration snapshots

1st decodes here from @AmsatSpain HADES-ICM 1500utc. 30-sec interval at first, then a stream. 200bd UZ7HO SoundModem to Telem decoder + GNU Radio / gr-satellites for upload to SatNogs!

@m6sig @scott23192 Before transmitting to the transponder, just disconnect the antenna from the SDR that is collecting telemetry.

@KC4LE @scott23192 How to protect the LNA from your own TX is a problem. I destroyed mine many years ago. 🤦

Got to love a satellite that streams high-volume data! ASRTU-1 over the Eastern U.S. downlinking 9k6 BPSK frames that will hopefully be assembled into a nice image by the Team. 455 decodes here via the 2.5-turn helical omni!

@scott23192 Thanks for those suggestions! I have an LNA - and I probably have a suitable outdoor enclosure lurking among the junk in my basement.

@KC4LE If you've got a spare $45 sitting around, you'll get WAY more signal w/ an LNA right at the antenna. Outdoor electrical enclosure protects it nicely, too. Of course, if you have local problems w/ nearby transmitters, etc., I suppose a filtered LNA would be better

@scott23192 Dang! I’m going to make one. Antennas are a bit of a challenge for me because I live in a subdivision. But I can make that work here.

@scott23192 Very cool - are you continuously steering the helical Omni?

@scott23192 Thanks a million for those links, Scott! So, how are you sending the gqrx audio to the flowgraph? Did you install gqrx & gpredict while the Live CD is running? Or maybe you are running the Live CD and gqrx/gpredict on separate machines and using local network TCP to connect them?

Hey Red! Yes - the LiveCD is great; I enjoy using more-or-less the same flowgraph for all sats. Note that a custom block in a new copy of gr-lilacsat is required for the proxy upload to work. Copy of that & my GRC here if you need a starting point --> qsl.net/k/k4kdr//grc/a…

@scott23192 Nice! Looks like you are running Gpredict & Gqrx with the Harbin websocket proxy and demod_asrtu-1_audio.grc flowgraph. I need to try that setup. I had an error running the rtlsdr demod flowgraph - something about distutils that I have not resolved.

89° ASRTU-1 pass over the U.S. East Coast provided my best streaming telem downlink to-date! FM repeater off while this camera image downlinked -- frames uploaded to Harbin + SatNogs.

@bg2bhc Does asrtu-1_tle.txt in the Windows based decoder need to be updated by the user? That file is delivered as Read-Only. The readme file doesn't specify, other than saying that Doppler corrections are made automatically. Thanks in advance & thanks for the new sat.