(i) Weathex WxR-301D as seen in Malaysia 2023: 4800 baud w/o PN9.
(ii) There was also a Weathex WxR-301D at UAII2022 with slightly different signal/data: 5000 baud PN9.
gcc weathex301d.c -o wxr301d
./wxr301d [options] <audio.wav>
options:
-b alternative demod
--json JSON output
--pn9
e.g.
(i) ./wxr301d weathex_fm.wav
(ii) ./wxr301d --pn9 weathex_pn9_fm.wav