Ntrip server baseline

Reach Module / M+ / M2 RTK / PPK configuration
1

Hello, i am using a public provider base. Everything works as expected. Rover and base are comunicating over TCP (internet). I can see both Rover and Base and everything works as expected.
My only problem is i get a very very unstable fix and almost always i am on float, even in really open area.

My baseline from the public ntrip service is 24 KM and when i get a fix i see correction ratio jumping up to a high number, than it starts falling until it reaches areound 10 and it goes to float forever again.

Should i drop my public server and setup my private base? Is 24KM baseline too much?

Corrado

2

10km is the max distance with rtk. I have been told with static mode you can go alot longer.
Has your provider VRS options?

3

Thank you. Provider has VRS, i tested it but results weren’t much better.

Corrado

4

Hi Corrado,

By the way, when using NTRIP you should have Glonass Ambiguity resolution set to “off”. As the receivers are of different type.

Does VRS show you a shorter baseline?

5

Yes, i have set Glonass ambiguity to off.

Using VRS gives me a baseline of few meters (5-6) but the fixing situation doesn’t get any better.

On the rover i am using a BIG antenna (Tallysmann 3740).

What i wonder is if i make my own base does the fixing status become more stable and trustable?

Corrado

6

I hade similar issue, but got fix eventually and not so bad as you got. With relative refrence located nearby with local wifi i got much faster and stable fix. Not sure what causes this behavior wtih vrs. Mine was also 5-10m away.
Did you enable the location feedback from your station? Think mine was set to singel.

7

I am not sure if the parameter you are referring to is “Send NMEA GGA messages” in correction input panel. If so yes it is enabled.

Corrado

8

It looks like you got some sort of “wtfigo”.
How long and days have you teste vrs? are you located with good visability to sat? good dop values?

9

Vrs has been tested about 2-3 hours a day in the last 10 das. Never got a stable fix. Maybe it fixes for 2-3 minutes than back to float.

I see a total of 17 Sats on the Rover, 7 of wich with green bars.

DOP 0.9

AR validation 1.1

Corrado

10

Have you tried postprocess?
You might fine tune a setting that gives you better results.

11

No, didn’t try post processing.

Corrado