[aprssig] Better of two GPS units for high speed aircraft?

[Jason KG4WSV]

I don't know about speed, but I was concerned about the GPS18 locking while
facing the horizon (antenna 90 degrees from optimal) and spinning, so I
rigged up a little test.  I spun a GPS18 at about 120RPM (powered on the GPS
and started spinning immediately). It locked and maintained lock until the
impromptu test rig self destructed.
-Jason
kg4wsv
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