[time-nuts] NIST

Brooke Clarke brooke at pacific.net
Fri Aug 31 17:31:48 UTC 2018


Hi Azelio:

Thanks for the link.
It's interesting that their setup (a Ku band satellite TV antenna and a standard GPS timing antenna) worked as well as 
it did with reversed polarity.  Does anyone know of a source of reverse polarity GPS antennas and a GPS timing receiver 
that also processes WAAS signals?

-- 
Have Fun,

Brooke Clarke
https://www.PRC68.com
https://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.

-------- Original Message --------
> Maybe this one is equivalent?
> <http://freqelec.com/gps_gnss/waas_for_telecom_2-07.pdf>
> On Fri, Aug 31, 2018 at 4:55 PM Attila Kinali <attila at kinali.ch> wrote:
>> On Thu, 30 Aug 2018 18:54:17 -0700
>> Brooke Clarke <brooke at pacific.net> wrote:
>>
>>> I wonder if anyone has tried using a small parabolic dish, like used for Free To Air satellite TV and aimed it at a GPS
>>> satellite track or at a WAAS geostationary satellite using a feed antenna with reverse polarization from a normal GPS
>>> antenna?
>> I have somewhere a paper (which i cannot find currently, sorry) that
>> used a dish trained at one of the EGNOS satellites and used it as the
>> only source for timing. IIRC the results were promising, but not
>> spectacular. The problem being that all the ionospheric and tropospheric
>> effects limited the performance, which also could not be averaged
>> over several satellites. Hence most people today focus on whole
>> constelation systems and try to get the best out of that, even under
>> multipath and jamming.
>>
>>                          Attila Kinali
>>
>> --
>> It is upon moral qualities that a society is ultimately founded. All
>> the prosperity and technological sophistication in the world is of no
>> use without that foundation.
>>                   -- Miss Matheson, The Diamond Age, Neal Stephenson
>>
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