[Xastir] New script: ads-b.pl for snagging airplane positions

[Curt Mills]

I added a new script today called "ads-b.pl". It must be edited to add your
callsign and passcode to actually use it. Perhaps I or someone else will
turn those into command-line options soon so you don't have to edit it.

Anyway: If you have an RTL SDR dongle ($10 to $20), you can run "dump1090"
with certain parameters to watch airplane positions from ADS-B. This new
perl script connects to that program and turns them into APRS Item packets,
then injects them into Xastir via "xastir_udp_client".

If you have TWO dongles, or want to watch the 978MHz frequency instead,
there are ways to do that using "dump978" in conjunction with "dump1090". I
haven't tested whether positions from "dump978" end up making it all the
way to Xastir yet using the above script in conjunction with those other
two programs. If someone tests this, please let us all know, else I'll get
to doing that eventually (I have two dongles, three if I borrow my son's).

Instructions are at the top of the script.

Enjoy!

-- 
Curt, WE7U
http://wetnet.net/~we7u
http://www.sarguydigital.com