[time-nuts] SE880 GPSDO

[Ilia Platone]

BTW, the u-Blox NEO-M8N doesn't fit RTK specs (patched it returns RAW 
data): it works on band L1 (20cm range), what I need is a GPS module 
capable on wiorking on L1+L2 to get 1cm range precision (if it's correct).

Regards,

Ilia.

Il 26/04/2016 22:25, Bruce Griffiths ha scritto:
> On Tuesday, April 26, 2016 02:40:14 PM Attila Kinali wrote:
>> Ciao Ilia,
>>
>> On Tue, 26 Apr 2016 02:24:04 +0200
>>
>> Ilia Platone <info at iliaplatone.com> wrote:
>>> Just for informations, as I must build the board from scratch, does this
>>> design is good to implement into the datalogger?
>>> I mean, for the second RTK purpose, does this u-blox module satisfy my
>>> requirements (link below)?
>>> http://www.opendigitalradio.org/lea-m8f-gpsdo
>> I cannot say. I don't know what your requirements are and thus
>> cannot say what a good design choice is.
>>
>> Yes, the LEA-M8F does support the output of satellite phase data.
>> Yes you can use that for RTK. BTW: this is stated in the documentation
>> for the module. You just need to read it.
>>
>> BTW2: is this a hobby project or is this a work project?
>>
>> 			Attila Kinali
> Specs are:
>
> 1) Relative position of any pair of clocks located up to 2km apart has to be
> known to within 3cm or so. Post processing is OK, however differential Earth
> tides between the clock locations may need to be considered.
>
> 2) The difference in the time offset between any pair of clocks located up to
> 2km apart shall not vary by more than 200ps (1ns time stamp quantisation) or
> 2ns (10ns timestamp quantisation) over an 8 hour period (at night).
> Post processing of data to fit wander etc is not practical as the SNR is too
> low to support this.
>
>
> Bruce
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-- 
Ilia Platone
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Cattolica (RN), Italy
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