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Nick Foster bistromath at gmail.comThis is a new one! Thanks for bringing it to my attention. Looks like a voluntary, GPS-based (i.e., not secondary surveillance) system. While the serial protocol appears to be NMEA-like, the protocol "under the hood" at the PHY layer could be basically anything, and the FLARM consortium appears to have elected to keep specs hidden. Reading the dataport specification gives few insights as to the PHY layer, but at least it's good to know the protocol has "future-proof" support for all aircraft types. [image: Inline image 1] If you record good FLARM transmissions I am happy to assist in decoding what I can, not least because proprietary protocols were meant to be open. =) --n On Fri, Dec 6, 2013 at 7:58 AM, Fritz Meier <fritz.meier at myway.de> wrote: > Hi, to all > after I've seen with RTL ADSB and DUMP1090 how ADS-B transponder data > 1090MHz (pulse modulation) is decoded I would like to start with FLARM > (Europe 868.2 and 868.4MHz frequency modulated). The position data of > gliders > (ID, latitude, longitude and altitude) are sent 1xsec in the form of > NMEA-like records. > I work with the BeagleBone black and have a FLARM transmitter installed > near > the RTL-Dongle/Antenne and may at any time start recording I/Qsamples with > RTL_SDR. > Thanks > Fritz > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20131206/4e04fabb/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 32534 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20131206/4e04fabb/attachment.png>