I';m a civil engineer but also a Ham operator, but know nothing about using GPS (our surveyors use it I think). In the past three months the Police here stop in because they are getting a false alarm at our address (three times now). Our single cell phone is not turned on, but uses a local area code, while the offending phone is a nearby area code. I suspect that somehow the various towers receive the same signal from a given distance and the several towers then come up with where the signal circles cross. Could not those crossing areas be far from me also? So any advice for the local cops? Nice guys, but it wastes their time to come in and visit.
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