up:: [[Ham Radio MOC]] ```breadcrumbs type: tree dir: down ``` # APRS MOC - [APRS Over Satellites](http://www.algissalys.com/amateur-radio/aprs-over-satellites) - Successful listening with [[gqrx]] and the built-in AFSK1200 decoder -  - Installing [[Xastir]] to set up an APRS iGate - http://xastir.org/index.php/Homebrew - Use via command line after running XQuartz with `xastir &` - Still need to do some configuration. Installation was done [[2021-06-06]] - [Xastir with RTLSDR](https://www.bytebang.at/Blog/Receive+APRS+stations+with+rtl-str+and+display+them+with+Xastir) - Need to use [[multimon-ng]] with rtl_fm and `socat` - `rtl_fm -f 144390000 -s 22050 -o 4 -g 100 - | multimon-ng -a AFSK1200 -A -t raw - | sed -u -r 's/^.{6}//' | socat -u STDIN TCP-LISTEN:14580,reuseaddr,fork` - Then Xastir needs to have connect to an internet server with localhost:14580 - I set this to an alias `start_aprs` - Configuration - Run callpass to generate - Station - GPS, comments - Defaults - Enable RF->Inet OR 2-way - Interface - Internet for APRS Tier 2 server interface (along with radio interface if want to function as igate) - This should be allowed to transmit - Password from `callpass` goes here - To use [[Xastir]] with [[SDR]] - Run `start_aprs` alias - Launch XQuartz - From the terminal that pops up, run `xastir &` - How to pass messages to internet? - Set up password by running `callpass <callsign>` to send and receive, add that to Tier 2 server interface config - I added another internet interface and pointed it to one of the Tier 2 APRS servers. I haven't seen anything on APRS.fi yet though. - Enable RF->Inet OR 2-way also needed. Verified on aprs.fi - Thinking about getting a [[Baofeng UV-5R]] for cheap APRS operation - Got it - [[Get Started with APRS with RTLSDR and Xastir on Mac Hub Page]] ## Other Modes [[FT-8]]