Signals, signals and signals
Hamburg, Germany
Joined July 2017
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Roland retweeted
A new version of DecSat has just been released; github.com/CasualArclamp/Decโฆ
Roland retweeted
Radiosondes received over the last 48 hrs by my station.
Potenza, Galatina ๐ฎ๐น; Belgrade, Negotin, Sjenica, Niลก ๐ท๐ธ; Sofia ๐ง๐ฌ; Thessaloniki, Athens ๐ฌ๐ท.
HW: Three @rtlsdrblog v.3 dongles on a @Raspberry_Pi 4 with J-pole Sirio CX 395 antenna + filtered preamp.
SW: radiosonde_auto_rx
Roland retweeted
I had a decant catch up call yesterday evening with Mr DecSat - really interesting! He's looking for sdr's so he can add support! I'm gonna have a dig around to see what I have!, please do the same if you can. There are cool things in the pipeline :-) #decsat
Roland retweeted
VMA Radio Lab: DecSAT Extended into a Multi-SDR Receiver with DVB-T/T2, DAB+ and Analog PAL TV rtl-sdr.com/vma-radio-lab-deโฆ
Roland retweeted
Unid HF FSK with two speeds: a 250 bps โ01โ preamble, then 500 bps data, 1000 Hz shift. Bitstream has 32-bit frames with a fixed phasing bit, like a 2022 signal tied to Kaliningrad by TDoA. A Russian origin is possible, not proven.
i56578-swl.blogspot.com/2026โฆ
Thanks to Paul #uhfsatcom i am playing with DecSat and some old BGAN and INMARSAT recordings. Excellent software! Classification of the sigals works fine.
Roland retweeted
Simultaneous reception of 3 radiosondes, released from Thessaloniki ๐ฌ๐ท, Niลก ๐ท๐ธ and Galatina ๐ฎ๐น, with the excellent radiosonde_auto_rx software by Mark @vk5qi.
Three @rtlsdrblog v.3 dongles on a @Raspberry_Pi 4.
Sirio CX 395 antenna with Uputronics 403 MHz Filtered Preamp.
Roland retweeted
There is a new release of DecSat github.com/CasualArclamp/Decโฆ - now supports the amazing Airspy RX! Very good tool for picking over Ku / C band data downlinks ;-)
Roland retweeted
DecSAT: A DVB-S/S2/S2X Satellite Receiver with Blind Scanning for the HackRF One rtl-sdr.com/decsat-a-dvb-s-sโฆ
Roland retweeted
The same COMSEC preamble, with a 40-bit fixed block inside a 128-bit IV, shows up on STANAG-4285, MS-110A and STANAG-4539 HF links. Common COMSEC protocol?
i56578-swl.blogspot.com/2026โฆ
Roland retweeted
US Navy stations on MS-110A 600bps/L send short bursts, each opening with a โ01โ run and the same 32-bit word (0x0A6E14DC), then random-looking data. Encrypted traffic or fill?
i56578-swl.blogspot.com/2026โฆ
Roland retweeted
2026-10-04 The ๐ท๐บ ๐ฐ UmKA-1 is transmitting that very short, legendary signal from 69 years ago, as a sign of deep respect for the pioneers of space exploration and its great orbital "ancestor".
๐ ๐ Happy World Space Week to all! ๐๐
The broadcast ends at midnight UTC.
Roland retweeted
2026-10-04 09:54 UTC. Reception of the CW beacon from the newly deployed ๐ฉ๐ช 1P PocketCube ๐ฐ๏ธ ERMINAZ-2U on 435.900 MHz. Replay of recorded IQ with @airspy_com Mini and Yagi antenna in ๐ฌ๐ท.
<CT> HI HI DE DP0PQA! <RN> @amsatdl
Roland retweeted
What If Your ESP32 Could Become an SDR?
ESP-SDR turns supported ESP32 boards into a small software-defined radio receiver.
It gives you access to raw IQ samples from the Wi-Fi radio, letting you see the 2.4 GHz spectrum and waterfall in a browser.
You can explore things like RF signals, spectrum analysis, IQ data and wireless interference without expensive SDR hardware.
The ESP32-C5 is even interesting here because it can work in the 5 GHz band.
A tiny development board suddenly becomes a great tool for learning RF and signal processing.
Would you try SDR on an ESP32?
Roland retweeted
A signal that keeps circling back: alongside the Russian Navy's T-600/CIS-36-50 family, a new candidate at 11592.0 kHz (FSK 41.6 Bd/200 Hz) doesn't quite fit any known configuration: close enough to be a relative, different enough to stay unidentified.
