Signals, signals and signals
Joined July 2017
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497 Photos and videos
I didn't realize it was much bigger than I had imagined until I saw the photo taken from this angle.
To receive extremely weak signals propagating through tropospheric scattering, you need lots of antenna gain, so using larger antennas is unavoidable.
#YLC20
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Roland retweeted
Simulating ADF ISB transmissions: 12-bit repetition coding on the USB channel alongside DTE-DCE synchronous timing, managed via hardwired logic and Arduino.
(Standalone educational PoC, not reflective of actual defense infra). 👇
i56578-swl.blogspot.com/2026…
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The printing house has finished its work and the Frequency Handbook for Radio Monitoring HF Edition 2026 is available now. You can find this book and also the new version of the Technical Handbook for Radio Monitoring HF Volume I and II Edition 2026 at:
frequencymanager.de
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The printing house has to finish its work. I will post a message when it is available at frequencymanager.de
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Location of Changbai Mountain site, one of the two 40-meter radio telescopes that were put into operation in the end of 2024.
#deepspace #radiotelescope #VLBI
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We are preparing the "Frequency Handbook for Radio Monitoring HF 2026". It will be available end of June in time for the Ham Radio 2026 in Friedrichshafen. We have expanded the contents with thousands of NDB frequencies. Of course it will be available as epub also. Stay tuned!
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Roland retweeted
May 28
2026-05-28 13:46 UTC. Image received from the 🇷🇺 🛰️ GEOSCAN-2 (RS92S2) on 436.160 MHz, in GMSK Geoscan @ 9600 bd, with @airspy_com R2 and Yagi antenna in 🇬🇷.
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Tianwen-2 is a Chinese asteroid sampling mission. Asteroid 469219 Kamo'oalewa Orbit insertion is planned for June 7, 2026. 📡〰️Received with our 20m @SternwarteBO #Tianwen2 #Asteroid
With the 25m Dwingeloo radio telescope, we just tracked #Tianwen-2 on X-band. It was at an offset of 1.1 degrees from asteroid Kamo'oalewa, which it is going to visit. We recorded IQ data, maybe others can decode this (@ea4gpz, @r2x0t, @aang254?). Data at data.camras.nl/satellites/ra….
ALT Screenshot showing a spectrum of Tianwen-2. Left shows SatDump with a clean constellation, using the Tianwen-1 decoder. Top right shows a graph of power vs time, which was used to find the right pointing. Bottom right shows another spectrum.
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Roland retweeted
ESCAPADE X-Band from @amsatdl Bochum with some ASCII data. Turbo 1115 CRC, the usual.
Funny structure though...
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