[FOSS-GPS] introduction and first help request

[Mauro Ugarte A]

  Hi Tomoji,
>> I ask this because it seems to
>> me that RTCM V3.1 messages broadcasted by RTK reference stations
>> (1001-1002 for precision GPS L1 only, 1003-1004 for precision GPS L1 &
>> L2) could be "constructed" by raw data output, and messages 1005-1006
>> too, using the station position. Is all this possible or am i missing
>> something?
>
> NovAtel OEMStar supports RTCM output including
> GLONASS (but L1 only).
>
> I plan to add the function to convert the receiver raw
> data stream to RTCM in future version of RTKLIB.

That is what we where planning to do! We just ordered a OEMStar module 
yesterday to use it as a reference station, but we thought it would only 
be useful to provide the DGPS type of corrections, no the RTK ones. 
Anyway, being able to provide corrections with a low cost consumer GPS 
that outputs raw data would be great, so we are going to be studying the 
theory behind that idea (that we don't fully understand yet) in the next 
days.

>
>> so if you know another faster
>> and cheaper, please let me know.
>
> I also recommend NovAtel OEMStar supporting 10Hz
> and GLONASS (with options). No program for RTK-
> GPS/GLONASS with RTKLIB 2.3.0. Just an probram is
> a little more expensive than ublox.
>
The only problem is the price, because there are chances that in the 
future we are going to need many rovers, and the OEMStar is a little 
expensive as you said, but since we are going to buy one anyway it 
should be useful to develop a prototype.

Thanks for your answers.

Best regards,

Mauro Ugarte A.
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