Hi,
As far as I can see, the rover raw data isn’t so good. Please take a look at the screenshot below:
In the first seconds of the log, we can see the cycle slips on all satellites. It looks like the drone was armed, and some of the electronics started affecting the signals. After that, we see that the SNR value for all satellites is very unstable, which confirms our previous assumption regarding electronic components’ influence.
First of all, I’d suggest placing the antenna as high as possible. However, not only the antenna might be affected by internal electronics but the module itself too. First, you need to turn all the components off and turn them on one by one to check how it affects Reach performance.