I’ve checked the data and I’m ready to share my findings with you.
Let’s see what the data from RS2 looks like. Below are the L1 recordings:
And this is L2:
There are rather few satellites with a good SNR (over 45) and they happen to be mostly for GPS and Galileo satellites. As Wingtra drone doesn’t track Galileo, it’s not possible to use this data for processing.
It’s okay for L2 to be generally lower than L1. Still, you can see that it stays generally at the 40 level. This is fine, even though not all of the visible satellites transmit the necessary frequency.
Overall, I can say that the data is okay. The only satellites that have cycle slips are the ones closer to the horizon. There are really few GLONASS satellites visible, too, so in the end, it may affect the solution.
The situation is a bit different for Wingtra. This is the L1 frequency:
You can see that the SNR stays around 40 and even drops to 35 sometimes. This is probably explained by the different type of antenna used on the drone.
This is L2 frequency:
It looks like the info on the GPS frequency is either indeed as low as 20 in SNR or it’s not recorded in the log at all. Either way, it’s hard to assess its quality as there’s not much data to go on.
So in the final processing, we can use only GPS and GLONASS data as there are no more recordings on the rover. Also, we need to tweak the settings during post-processing to include the L2 frequency data from the drone.
I used our Emlid Studio to post-process the data. I’ve changed the default settings a bit:
SNR mask to 20 to include the data from the drone
Elevation mask to 10 for the same reason
Filer type to Combined for a thorough run-through
I’ve managed to get the 98.5% of Fix. Here’s a screenshot:
The default settings are working a bit worse as they completely cut off the L2 data from Wigntra.
So what I can suggest here. You can place the base a bit more in accordance with our Placing the base guide. This will help to ensure that all of the GPS satellites have a good SNR. It may be a good idea to choose the day of the survey that allows you to see more GLONASS satellites. More GPS sats that can provide L2C can be helpful as well. You can track them via various tools, like GNSS radar.
Also, it may be possible to play with the settings in your post-processing software. I don’t have much experience in working with Wingtra products so I can’t really guide you there. But I believe their support will be able to help you out with it.