[aprssig] Simplest P-n-P APRS WX stn

[Scott Miller]

> and send it out here.  The main benefits of these derive from sonic 
> anemometers that need to be carefully aligned to north, but which have 
> no moving parts, and require maintenance and calibration much less 
> frequently.

Why do these need to be aligned any more carefully than mechanical 
anemometers?

Scott
N1VG