SDRCrew 2.8: complete weather-balloon radiosondes, new sources and the Perseus

SDRCrew 2.8 is out. This time most of the news comes from one tab, the radiosondes, and from a new tab called "Sources".
RADIOSONDES
- Automatic search of the whole 400-406 MHz band: you no longer need to know the frequency, the program tries the signals that stand out and stays on the sonde that answers.
- The sondes in flight near you from SondeHub's open data, with a "Listen" button that tunes their frequency (an option you turn on: it sends your position, rounded, to SondeHub).
- A map next to the lists, a warning with a sound and the estimated landing point when a sonde comes down within 150 km, and a live "finder" with distance, bearing, elevation and an arrow.
- Charts of height, temperature, humidity, wind and climb rate, and a Skew-T; export of the track as KML, GPX and CSV; saving the raw signal to decode it again.
- Also, off until you turn them on: uploading the packets you receive to SondeHub under your callsign, an antenna rotator (rotctld), NMEA output like a GPS, and automatic listening at launch times.
SOURCES
- An RTL-SDR on another PC or on a Raspberry Pi (rtl_tcp) works with every tab as if it were here.
- A recording (SigMF, cu8, cs8, cs16, cf32) acts as a dongle: every tab receives it at its real speed.
- "Time machine": the dongle keeps the last minutes of the signal on disk and you can save them afterwards as a SigMF recording.
- Any SoapySDR receiver (bladeRF, LimeSDR, ADALM-Pluto, USRP) when its module is installed.
- Events sent out: webhook, MQTT and a CSV file for emergency squawks, sondes coming down and satellite passes.
- Perseus: support through Microtelecom's 32-bit ExtIO plug-in, with a helper program.
OTHER THINGS
- The ppm (frequency error) is remembered for each dongle, by serial number. It cost me an hour of doubt: APRS seemed to receive nothing, and the reason was a ppm of 77 left over from the old dongle, which at 144.8 MHz moves the signal 11 kHz out of the filter.
- Satellites: a countdown to the next pass, a much bigger map with a draggable divider, "Sky" is now called "Trajectory".
- AIS and APRS: a picture for each kind of vessel and a clearer legend.
WHAT I HAVE NOT TESTED
To be honest: I have never seen the sonde search, the charts, the upload and the landing estimate on a real sonde in flight; I tested the Perseus and the network rtl_tcp servers only with stand-ins. They work with simulated signals, a real dongle for the time machine and real SondeHub data, but if you try them in the field, and above all if you own a Perseus, tell me how it went. The instructions for Perseus owners are in the repository (docs/PERSEUS-ISTRUZIONI.md).
Updates reach everyone who already has SDRCrew automatically. Everyone else: https://codeberg.org/IU2PYG/sdrcrew-releases
73 de IU2PYG



















