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Originally Posted by Boomer58cal
Any of you recalibrate your GPS? Probably not.
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"Recalibrate GPS"?
GPS is based on the time delay between the device and the satellites. The satellites are in geosynchronous orbit. There is no way of "recalibrating" and no way for them to lose calibration.
I have used a large number of GPS products over the years, from $100 units bought at WalMart to cell phones and units built into aircraft communication equipment that cost $15,000+.
I have never seen a single unit that was wrong, beyond reasonable accuracy errors of a few tens of meters.
The only calibration that needs to be made is the receiving units internal clock. It does that automatically by adjusting time until the signals that it's getting from at least 4 satellites create 4 spheres that overlap at a single point. It's pretty much impossible for that calibration to be wrong.
MAYBE there's something about military units that require that time calibration to be done manually, I don't know, but I do know that no civilian units I've ever seen have any such thing.