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Re:ADS-B Exchange – Co-op of unfiltered flight data by someguydave on Tuesday February 18, 2020 @11:36PM (#22363067)
which software do you use to demodulate P25? gnuradio?
Re:ADS-B Exchange – Co-op of unfiltered flight data by crankylinuxuser on Wednesday February 19, 2020 @12:29AM (#22363257)
I use https://github.com/robotastic/trunk-recorder

You'll use https://www.radioreference.com and get the appropriate control and voice channels for your area. You'll also get the talkgroups and put them in a CSV.

From there, you'll use http://garvas.org/trunk-recorder/ to determine how many RTL-SDR dongles (or others) you'll need, along with their respective center frequencies. Note that you'll copy/paste the relevant control/voice line for your p25 from radioreferece.com

From there, just define where to store the files on the drive, and off it goes. There's a python webserver ( https://github.com/ScanOC/trunk-player ) you can install for on-prem, and/or you can also upload it to openmhz website ( https://github.com/robotastic/trunk-recorder/wiki/Uploading-... ).

Re:ADS-B Exchange – Co-op of unfiltered flight data by prashnts on Wednesday February 19, 2020 @06:09AM (#22364571)
Not OP, but thank you! I recently got a SDR dongle and was going to set it up. This will help.