[amsat-bb] Re: Balloon project / APRS based antenna control?

David Johnson dave at g4dpz.me.uk
Sun Nov 12 10:47:31 PST 2006


It should be fairly straightforward as you know the position and 
velocity vectors of both the device and observer.

You could use a modified version of something like 'Predict' to do the 
az-el calculation and use it's serial drivers for something like a G5500.



Stefan Wagener wrote:
> I was wondering if anyone has come along a program that would allow the use 
> of live APRS location data from a high altitude balloon to be converted for 
> azimuth and elevation control of a rotor on the ground for antenna control. 
> We are thinking of using such a set-up to receive relative "weak" ATV 
> signals.
> Any feedback appreciated.
> 73, Stefan VE4NSA
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