[aprssig] APRS 'sky writing'

[VK6 UFO]

I did this one <http://img717.imageshack.us/img717/4240/aprswriter.jpg> at
the beginning of the year at work in my car (coffee break!). The letters are
about 35 metres high. I used an OpenTracker+ with the 'TX now' signal wired
up so I could force a beacon. I had just enough space to fit in 'UFO.'

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Rob VK6UFO
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