[time-nuts] FTS4060 Continuing Saga

Hal Murray hmurray at suespammers.org
Mon Mar 6 03:13:52 EST 2006

> Rain should have an effect on the timing of the signal, since the
> propagation speed of radio waves through water is different from that
> through air. It will also attenuate the signal, causing worse S/N
> ratio which would cause the lower-elevation satellites to not be seen.

That's what I would expect, but a quick search via google doesn't find 
anything to back that up.  Do you have any numbers?  The links below may 
think that 10 ns (aka 10 ft) isn't anything to worry about.

    Cloud, Rain, Snow, weather in general does NOT attenuate
    the GPS signals enough to effect accuracy.
The link off to specs that back that up doesn't mention rain.

    Clouds, rain, snow, and weather don't reduce the strength
    of GPS signals enough to reduce accuracy. The only way that
    weather can weaken signals is when a significant amount of rain
    or snow accumulates on the GPS receiver antenna or on an
    overhead tree canopy.

This says/mumbles that it does matter:
But doesn't give any numbers.

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