Hi Centipede, We’re trying to use corrections from station AGBI in Billund, Denmark (and KLERKE), without luck.
We do receive a lot of corrections, but I can see that we receive the following corrections on station ID 0 (1005, 1006, 1008, 1033, 1230). But all the MSM7 (1077, 1087 etc.) is received on various different station IDs?
How can that be? We’re not able to resolve to RTK when the station ID is not the same?
Thanks!
Best,
Mathias
Hi mathias,
How do you see that MSM7 messages are sending a different station ID?
Hi Stephane,
I parse all RTCMv3 messages in our firmware before sending it to the GNSS receiver.
I also see quite a large number of messages that has an invalid checksum…
Best,
Mathias
With RTKLib and Snip parsing the rtcm stream from AGBI, I didn’t find anything strange.
Could it be a problem in your firmware?
Hi Stephane,
I have a different question.
I believe that you are using the french geodetic system, RGF93, but we do only support WGS84.
Is there anything I need to do in order to use the correction sent from you?
I’m trying to get it working on a ZED-F9P, which I believe is quite common for the base-stations on your network as well.
Best,
Mathias
The coordinate reference system depends on the base location. It should be the local CRS.
WGS84 is always a bad idea when you use a RTK receiver.
The offset between RGF93 and WGS84 is about 80cm.
Hi Stephane,
It might be that it is me that’s a bit confused.
But the corrections that are sent from the casters are relative to RGF93? Meaning that if we’re using WGS84, we will get an offset error?
Best,
Mathias
Yes.
But don’t forget that Wgs84 coordinates are constantly moving. About 2cm per year in Europe, 10cm in Australia.
Local coordinate systems don’t move, or more exactly, are moving with our slow boat, our tectonic plate.
