why did old (like 90s/2000s) GPS take up to 15 minutes to get a lock, in giant bulky units, but my running watch gets it in 15 seconds?
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How does the gps system lock out opponent clients, by that I mean, us gps isn’t going to ‘aid’ or be available to, Russian cruise missiles to assist them in their mission accuracy? Do they just make the data or clock signal slightly inaccurate so it’s to be functionally worthless? I know that military GPS is far more accurate than consumer receivers, is that inaccuracy good enough to discourage use?
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