I have been having a lot of problems with the Here3 with the sat count. Today I went to test 2 of my drones, one with Orange cube, 4.1FW, Here3. The other drone, Black Cube, 4.1FW, Here2 GPS and serial connection.
As you can see in this picture, the sat count is very different.
I have done that and the result is the same, but i have discovered why.
Im using a MK15 remote (I prefer the HereLink, ,but because the camera I have to use a different one), and the air unit seems to generate such interference that the GPS cant get all the sats.
We had to cover the inside of the canopy with aluminium to avoid the problem, and this seems to fix it. We try do shield the GPS with cooper sheets, but doesnt work, the problem was the same.
Here are some pictures of the drone, the inside and the solution