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· HAQ and AW moderator
8,413 Posts
Current GPS receivers seem very sensitive. We have foil/polyester sandwich insulation directly under our roof, so not much gets through that (and the CIA can't read our brainwaves). I have found, with both my Sure GPS and my Raspberry PI GPS, that the simple antennae work very well stuck on the inside of a north-facing second-storey window.
I tried with a earlier GPS watch to get synced inside my apartment near a window. It did not work. the Astron keeps trying and failing do to save power I put it in airplane mode.
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