[time-nuts] GPS shielding by power lines?

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Aug 10 08:20:05 EDT 2008

Around all high voltage lines the air is somewhat ionized and this
may result in sufficient free electrons to seriously mess up the
GPS signal, although I wouldn't expect much trouble from a 11kV

The fact that the navigation message is 50Hz in the GPS signal and
the power-grid in the UK is "close to 50Hz" is not a good thing
in any case.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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