http://www.arhab.org/ – has powerpoints on balloonsats and and construction.
http://aprs.fi/#!lat=40.05320&lng=-83.02200 – real time tracking of aprs station.
http://www.arhab.org/ – has powerpoints on balloonsats and and construction.
http://aprs.fi/#!lat=40.05320&lng=-83.02200 – real time tracking of aprs station.