Reply to post: Re: Big Outage

Experts: No need to worry about Europe's navigation sats going dark for days. Also: What the hell is going on with those satellites?!

Milo Tsukroff

Re: Big Outage

The problem isn't the clock. It's Einstein, and the way that mass is not evenly distributed throughout the Earth. American GPS clocks have to be reset every day. Because they fly over the surface of the earth, and the uneven nature of mass distribution affects the special- and general-relativistic slowing of the on-board clocks. It's just not predictable, no matter how well Einstein's theories have been confirmed. Without a reset daily, GPS'es go out, way out.

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