Emlid

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UAV Consulting


(Michael Lambert) #22

Awesome, thanks @timmyd. I have run two tests now and it captured my events as well, including the DroneDeploy preflight test shot. Since I usually takeoff from one of my GCPs it may be a good way to get that for the processing if needed. Or at least a checkpoint.
I have chatted with Stephanie, but still need to have the demo.


(Michael Lambert) #23

Hi all! I am making my first attempt at using RTKLIB to process my Reach M+ P4P and RS+ data. I am at RTKPOST now and don’t know which, or if both NAV files?

image


(Christian Grüner) #24

According to Emlid, you should use the rover nav file. However, especially under difficult conditions, I find it helpful to use the mgex .yyp files for this.


(Michael Lambert) #25

Got it. I will try both and ground-truth. Thanks @wizprod.


(Michael Lambert) #26

Next thing I need help understanding is the positions tab in options. What do I do when I set my base station up on a known point? I manually entered the coordinates in base mode, but did not run corrections. Do I need the base obs at all? Or can I just manually enter it in positions? The documentation suggest Rinex Header…

image


(Christian Grüner) #27

Use the drop-down just over the 3 input-fields, and choose the right option.


(Michael Lambert) #28

That’s what I was assuming, but wanted to make sure. So what does the base obs do if I enter manually?

*Also, I need to enter the rod height somewhere? In antenna underneath?


#29

:+1:


(Michael Lambert) #30

image


#31

You probably need to put a 0 (zero) in front of (.23)
If RTKpost is that smart i would be surprised :sweat_smile:


(Michael Lambert) #32

:+1:, does that make sense to put in from the Tallysman down to the camera center?


(Michael Lambert) #33

Everything seemed to post-process correctly, but I won’t know until I can upgrade the geotags in the images and process the map. I am going to try to use Geosetter. First thing I ran into is that it does not like the Emlid RTKLIB GPX file.


#34

Sorry, on my third beer.(Friday night here). Everything seems to make sense now :innocent:
I might edit this post in the morning


(Michael Lambert) #35

Enjoy! Thanks for the live assistance! I’ve got two hours left… :slight_smile:


#36

But yeah, a positive value would put the antenna above the object you need the correct value for.


(Michael Lambert) #37

Ok, got the GPX file into Geosetter and it doesn’t have time, elevations or airspeed. The POS files do. With the events file there has to be an easier way?


#38

(Michael Lambert) #39

So now I see another offset value underneath that. Do I need to put the rover antenna height in there as well?


#40

You dont have to if offsets been applied earlier.


(Michael Lambert) #41

I left that offset alone and am processing the data. I have a case study running and will have processed these images with 6 different methods so the ground-truth and end of this thread are near! Once I am comfortable with this mission and results I will, of course, run subsequent flights to proof the workflow. By the end I should have solid data comparison of the following.

Ground Survey
vs
Drone Surveys

  1. DJI P4P with single-point calibration
  2. Emlid P4P M+ (mounted-only) with single-point
  3. DJI P4P with GCPs
  4. Emlid P4P M+ PPK with single-point calibration
  5. Emlid P4P M+ PPK with GCPs