Noisy signals in Reach RS2 and M2 may cause no fix in RTKLIB

[tatsuyaw5856]

I have been faced with a problem to get fix soluiton in RTKLIB.
I have enough experience to operate Reach series (M+ and RS) and RTKLIB.
However, all recent surveys after start using new Reach RS2 and M2 failed probably because of noisy signals.

Yesterday, I did a comparative test using Reach devices I have (one RS2, one M2 and two M+). All devises are installed latest firmware and sampled GPS, Galileo and Beidou with 5 Hz.
The combination of two Reach M+ got a stable fixed solution. However, calculations using RS2 and/or M2 showed abnoramal results.

I realized that RS2 and M2 contains noisy signals in comparizon with M+.
These two images show the results of RTKLIB calculation in single positioning.
The upper image is RS2 and lower is M+.

As you can see, RS2 shows larger fluctuation than M+.
These data were obtained at same time and same place.

I’m thinking that this noisy signals cause no fix in RTKLIB.
However, I have no idea why RS2 and M2 contains such a noisy signals.

I should be very pleased if someone gives me helpful comments.

Tatsuya

[tatiana.andreeva]

Hi Tatsuya,

Could you share these datasets with us so that we can look into them? The following files would be of help:

• raw data logs from bases (RS2 and M+)
• raw data, position, base correction logs from rovers (M2 and M+)
• photos of environment and hardware setup
• Simple System reports from all the devices

[tatsuyaw5856]

Hi Tatiana,

Thank you for your reply.

I acquired Reach data which you need to check.
The data and photos are uploaded to Google Drive.

https://drive.google.com/drive/folders/18npWRRB7DiBp3QPfdhQkyCtlZJKOsbhJ?usp=sharing

Unfortunately Google drive rejects to upload Base files (.RTCM3).
If you need the Base files, I’ll send them by e-mail.

I hope you can find solutions to solve the problem.

Tatsuya

[tatiana.andreeva]

Hi Tatsuya,

I’ve processed your data in RTKLIB using Static positioning mode and got quite good results for both setups:

• Reach M+ base + Reach M+ rover

• Reach RS2 base + Reach M2 rover

Could you clarify which RTKLIB version you tried?