Stop & Go won't correct CSV - Shows "0 points averaged"

Emlid Studio Stop & Go with Emlid Flow
1

Hello guys,

I’m trying to process some ground control points that were collected a couple weeks ago. I set my RS2+ base on an unknown point, let it collect for 4 hours and processed that data using the NRCan-PPP process. The Rover data was collected in SINGLE, with 5 second averaging. The base is no more that 1km away from the rover at any time.

In Emlid studio, I’m trying to process the points with Stop & Go, but it won’t correct the any of them no matter if I select FIX, Float, Single, or any combination of those.

  • I’ve selected the .25O files for the base and rover
  • selected the .25P navigation file from the Rover
  • input the corrected coordinates for the Base that came from the NRCan-PPP output
  • Adjusted the Kinematic settings to use Combined Filter, Elevation mask: 25, SNR Mask 41 for both L1/L2
  • I’m only getting around 31% fix results at this point.
  • I’ve exported the Project from Emlid Flow as a CSV and added that after the Kinematic process is complete.
  • I have FIX/FLOAT/SINGLE all selected.
  • Emlid Studio returns “0 points of 5 were averaged in SINGLE, FLOAT, FIX” and the “Corrected” file has no data.

I can’t seem to see where I’m going wrong. I’ve uploaded the files I used for reference here.

Thanks all!

1 Like
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Is the base coords the same in the raw data and CSV?

Do your time zones and timestamps match between base, rover, and survey points.

4

Hi @kevan.freeland

Thanks for explaining your workflow. From what it sounds like, the setup looks good. I will check out what @timd1971 has mentioned in the files and try to reproduce the issue. I’ll keep you posted on my findings.

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Yes, everything seems to match up. The CSV exported form Emlid Flow shows the timestamps as UTC minus 7 hours, that’s the only discrepancy I see.

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Thanks Keith. looking forward to what you can discover.

7

A bit of a follow up question to this issue. If the Rover data was not collected correctly, or there is a non-resolvable issue, I should be able to return to the site, and do an RTK survey on the points now that I have a known location for the base correct?

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Yes you can definately do that. That is the route I go in most cases because it seems like Stop & Go doesn’t work well for me.

1 Like
9

Hi, for help on setting up a manual point for your Base unit see Emlid’s docs mentioned below.

3 Likes
10

It seems like you are doing post-processing work, in this case the collection time of 5s is minimal, I would do at least 5 minutes

2 Likes
11

@kevan.freeland , thanks for your patience while I continue investigating this for you.

Had you enabled UBX logging during the log recording? If so, can you send them as well?

This is because the update rate from the rover RINEX logs was 30 seconds, which can explain why Emlid Studio could not properly interpolate the coordinates. I can use the raw logs in UBX format in Emlid Studio and share my findings with you.

1 Like
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Hey @keith.mwangi, I sent a support request yesterday through the Emlid support form and attached all of the files including the UBX files. Are you able to access them from there?

Thanks

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@kevan.freeland Awesome, thanks!

In this case, we can continue the conversation over there, just to have everything in one place.