https://github.com/projecthorus/radiosonde_auto_rx/wiki
https://radiosondy.info/
https://aprs.fi/
http://www.coaa.co.uk/sondemonitor.htm
http://www.forum.radiosonda.sk/viewtopic.php?f=7&t=2955
http://www.om3bc.com/docs/SF/sondefinder_sk.html
http://escursioni.altervista.org/Radiosonde/
http://predict.habhub.org/