[time-nuts] Story in the Economist about GPS jamming

[Scott McGrath]

The atmosphere protects the earth from a lot of stuff the universe throws at us 

Solar flares , space junk , micrometeors just the usual hazards the space at large has.  Inability to service satellites when transmitters or RCS fuel exhausted

Sent from my iPhone

On Jul 30, 2013, at 9:31 AM, "Lester Veenstra" <lester at veenstras.com> wrote:

> Exactly what do you mean by "... based in LEO has a relatively high risk
> profile from the Universe/hostile activity/spoofing and jamming..."?
> 
> Other than a LOS, in a jammers immediate area, GPS is not subject to
> jamming, and for the critical users, ie, the DOD, very difficult to jam,
> even in a LOS.
> 
> The LEO makes it harder to jam since the received signal strength is higher
> than would be practical from GeoSync orbit, not easier,  as is implied my
> Mr. McGraths comment.
> 
> Lester B Veenstra  MØYCM K1YCM W8YCM
> lester at veenstras.com
> 
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