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Mark Jessop 2023-10-27 08:34:54 +10:30
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@ -72,7 +72,7 @@ It is also possible to connect auto_rx to an AirSpy SpyServer, allowing decoding
By running auto_rx continuously, not just at known radiosonde launch times, you may see other radiosonde launches (military or otherwise) that would otherwise go un-noticed. Here in Australia, we discovered the Bureau of Meteorology's Ozone sounding schedule this way (which was later confirmed by the Bureau - thanks guys!).
## 2. Hardware Requirements
* Ideally, a standalone single-board computer (Raspberry Pi 3 or newer, ODroid, etc...) to run the software. Other Linux machines will also work. It will not work under WSL.
* Ideally, a standalone single-board computer (Raspberry Pi 3 or newer, ODroid, etc...) to run the software. Other Linux machines will also work. It has been reported to work under WSL, though I cannot provide any support for this.
* A RTLSDR receiver, or the SpyServer software connected to an AirSpy Mini/R2.
* A receiver with a TCXO is *mandatory*, and you must make sure the PPM offset value is set correctly ([see here](https://github.com/projecthorus/radiosonde_auto_rx/wiki/Configuration-Settings#important-settings)). The demodulators are quite sensitive to frequency offsets, and the warm-up drift of the non-TCXO RTLSDRs is enough to throw it off. I've had great success with the [RTL-SDR.com 'v3' dongles](https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/). The [NooElec SMArt](https://www.nooelec.com/store/sdr/sdr-receivers/nesdr/nesdr-smartee-sdr.html) dongles (with the TCXO option) are also good.
* An antenna suitable for receiving on 400-406 MHz (a basic [1/4 wave monopole](https://m0ukd.com/calculators/quarter-wave-ground-plane-antenna-calculator/) is usually good enough). If you have an 70cm amateur-band antenna, that will probably work fine too.