[time-nuts] From GPS World - Lightsquared has been given the goahead

[Eric Garner]

Since this issue is a concern, write the FCC oversight committees:


House of Representatives:

http://democrats.energycommerce.house.gov/index.php?q=subcommittee/subcommittee-on-oversight-and-investigations-0

(note: the "democrats" part of the URL is because the house.gov site
is broken into majority and minority sites and the current house
majority has apparently not gotten their ducks in a row yet)

Senate:
http://commerce.senate.gov/public/index.cfm?p=CommunicationsTechnologyandtheInternet




On Wed, Feb 2, 2011 at 9:29 AM, Don Latham <djl at montana.com> wrote:
> sooooo, once the safety of life equipment is in place, with controlled
> purchase of receivers no doubt, the consumer signals can be shut off at
> will. And we're SOL. Neat.
> cynical Don
>
> Mark Spencer
>> That's quite possible, another option is that aviation receivers may err
>> on the
>> side of caution and not use GPS signals that are considered to be degraded
>> beyond a certain level.   This is just speculation on my part.
>>
>> As other posters have pointed it seems a bit ironic that shortly after
>> shutting
>> down Loran in the US this issue emerges, although I seem to recall there
>> is a
>> move towards a new GPS frequency band for safety of life applications (the
>> L5
>> Signal IIRC ?)
>>
>> Your comment about the improvements in signal processing is a good one and
>> pondering this issue a bit more I wonder how much advancement has occurred
>> in
>> timing receivers over the years versus consumer devices which likely have
>> a
>> shorter product cycle.   This may lead to more issues in timing
>> applications.
>>
>>
>>
>> ----- Original Message ----
>> From: jimlux <jimlux at earthlink.net>
>> To: time-nuts at febo.com
>> Sent: Wed, February 2, 2011 6:45:29 AM
>> Subject: Re: [time-nuts] From GPS World - Lightsquared has been given the
>> goahead
>>
>>
>> what was interesting is that the jamming/fail to get fix was at a closer
>> distance for the consumer receiver than for the FAA approved receiver
>> for aircraft.  Maybe it's better signal processing in the (presumably
>> newer) consumer receiver.
>>
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>>
>>
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>
>
> --
> "Neither the voice of authority nor the weight of reason and argument are
> as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
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-- 
--Eric
_________________________________________
Eric Garner