[time-nuts] L1/L2 GPS Receiver

[Michael Perrett]

Magnus, I believe that he is referencing the the new L2 C/A code, which is
not protected. Reference
http://www.gps.gov/systems/gps/modernization/civilsignals/

Michael / K7HIL


On Thu, Jan 16, 2014 at 2:04 PM, Magnus Danielson <
magnus at rubidium.dyndns.org> wrote:

> On 16/01/14 20:29, Hal Murray wrote:
>
>>
>> anders.e.e.wallin at gmail.com said:
>>
>>> The real benefit of dual-frequency is you can do post-processing with
>>> PPP.
>>> Javad has some modules but they start at 3 kUSD - if anyone knows of
>>> hobby
>>> level priced L1/L2 receivers that can produce rinex-files for PPP
>>> processing
>>> that would be interesting!
>>>
>>
>> Has anybody considered doing it in software?
>>
>> If I wanted to play with that sort of stuff, is there any particular SDR
>> hardware package/project that would good to start with?
>>
>
> You want P(Y) capable receivers, which means 20,46 MHz bandwidth on both
> L1 and L2 bands. You want say 12 channels. Lots of raw sample data to
> crunch on in real time. I'd say that you would really like to mimic the
> traditional style of doing the mechanical stuff in HW/FPGA and then do the
> remainder in some suitable processor.
>
> Going from C/A to P(Y) is a bit challangeing on it's own, as you where not
> supposed to be able to do that, only to get the P code.
>
> Cheers,
> Magnus
>
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