[FOSS-GPS] introduction and first help request

[Tomoji TAKASU]

Dear Mauro

> 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.

I confirmed the OEMStar manual.

OEMStar can output RTCM 1002, 1004, 1010, 1012 but
does not support carrier-phase observables as follows.

>The OEMStar does not currently transmit carrier phase corrections.

With RTKLIB 2.3.0, you can use RANGECMPB or
RANGEB raw carrier phase same as OEM4/V
instead of RTCM.

Best regards,

Tomoji TAKASU
WWW: http://gpspp.sakura.ne.jp


--------------------------------------------------
From: "Mauro Ugarte A" <mauro.ugarte at cefop.udec.cl>
Sent: Thursday, May 27, 2010 1:19 PM
To: <foss-gps at lists.osgeo.org>
Subject: Re: [FOSS-GPS] introduction and first help request

>  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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