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

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Satnav are not LEO but MEO. Which is good - less sv to cover the earth. Less good because distance is higher compared to LEO regarding signal power at earth.

 --

Björn


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-------- Originalmeddelande --------
Från: Scott McGrath <scmcgrath at gmail.com> 
Datum: 2013-07-30  14:50  (GMT+01:00) 
Till: jfor at quikus.com,Discussion of precise time and frequency measurement <time-nuts at febo.com> 
Kopia: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
Rubrik: Re: [time-nuts] Story in the Economist about GPS jamming 
 
Any competent engineer could have told the powers that be that a satellite system based in LEO has a relatively high risk profile from the Universe/hostile activity/spoofing and jamming

Yes GPS is/was oversold.  

Trouble is Clarkes law applies here (any sufficiently advanced technology is indistinguishable from magic).  And this applies double to the technological illiterates in DC

See Sen 'Tubes' Stevens for the canonical example

Sent from my iPhone

On Jul 29, 2013, at 12:46 PM, "J. Forster" <jfor at quikus.com> wrote:

> It seems to me that GPS has been oversold as the be all, end all system
> that made all other systems obsolete and GPS has become all but an
> indespensible utility.
> 
> Reports like this, could well be used to promote a backup, like LORAN or
> eLORAN, just as public buildings have backup generators.
> 
> YMMV,
> 
> -John
> 
> ==================
> 
> 
>> 
>> http://www.economist.com/news/international/21582288-satellite-positioning-data-are-vitalbut-signal-surprisingly-easy-disrupt-out?fsrc=scn/tw/te/pe/outofsight
>> 
>>                                -Bill
>> 
>> 
>> 
>> 
>> 
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