[time-nuts] Story in the Economist about GPS jamming
Scott McGrath
scmcgrath at gmail.com
Tue Jul 30 16:25:36 UTC 2013
If you read article the City of London basically has a GPS denial 10-15 minutes daily this covers a couple square miles
A lot of people are under the misconception that the spy shop jammers only do a few feet. Reality is most of them are 100-500 mw and blank out at least a square mile
A suitcase sized unit at a high elevation could deny hundreds of square miles
Sent from my iPhone
On Jul 30, 2013, at 11:52 AM, Chris Albertson <albertson.chris at gmail.com> wrote:
> It is easy to jam a simple GPS receiver. Harder to jam a military
> receiver. In a conflict a jammer of any kind is pretty much a beacon that
> says "here I am". It is one of the bigger problems of jamming, you have to
> radiate RF. So either you have to be very close to your target or have a
> powerful jammer.
>
> Simple civilian jammers are easy, like the one a truck driver might use to
> prevent his boss from tracking him, It only has to cover a few feet. But
> try and jam a jet flying at 40,000 feet or a navel carrier task force.
>
>
> On Tue, Jul 30, 2013 at 5:50 AM, Scott McGrath <scmcgrath at gmail.com> wrote:
>
>> 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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>
>
> --
>
> Chris Albertson
> Redondo Beach, California
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