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4hv.org :: Forums :: Electromagnetic Radiation
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APRS

Move Thread LAN_403
Alex
Sun Jan 21 2007, 11:51PM Print
Alex Geometrically Frustrated
Registered Member #6 Joined: Thu Feb 02 2006, 04:18AM
Location: Bowdoin, Maine
Posts: 373
Every once in a while I get interested in ham radio again. This is one of those times. I think the problem is that I like to build things and learn things, but their functionality isn't very useful to me. Take APRS, a system for position reporting via radio and GPS.

I installed xubuntu on a 1.3GHz AMD Duron w/512MB of RAM that I had kicking around my room; it's now running xastir, which talks to my modded kantronics kam (some hardware and software hacks have made it a functional equivalent of a kam plus). The TNC controls a little 5W handheld rig, which is connected to a 2m ringo ranger on the side of my house. I'm thinking about getting a mast to put the antenna on, but it's doing fine for now.

My setup seems to be fairly capable - I've tracked Canadian stations 300 miles away from my location in southern Maine. For some reason, I don't seem to be able to see much to the West. I think it might have to do with my antenna's location (the east side of my house).

Here's a screenshot of a balloon I watched earlier today:
[See full size image.]

The red dots are the station's reported points. It appears to have changed directions and followed route 1, and it's flying quite low. Is that a manned balloon? Who would be flying a balloon in Maine in January? I'll have to look into that a little...

Here's a picture showing all the stations I can see:

[See full size image.]


I reccomend xastir highly, give it a shot using a soundcard tnc and an audio cable from your radio (you'll have to do a bit more to be able to transmit though.) I compiled the latest stable version with support for every flavor of map it can handle, and festival speech synthesis for audio updates.
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