Today, I did 4 flights on snow covered X-country ski trails and a snowmobile trail under overcast skies and a temperature of about 1ºC. I had trouble with the
Tello holding position and at one point got a message saying that VPS was off and that I should land immediately. This was when the
Tello was over snow that was featureless. It was a bit better when it was over snow that had texture like the X-country track or the skidoo track. I was quite surprised at how unstable
Tello had become and have to wonder if the overcast sky caused the VPS to have trouble. The average wind speed was 4km/h with gusts up to 9km/h, so the wind wasn't that much. Landing on a large landing pad was also difficult and I had trouble holding the
Tello steady to land on the pad (at one point it missed and landed in the packed snow.
I tried to see how far I could go before my signal dropped - I figure I went out about 50m before the WiFi signal got too low, nowhere near the 100m that is advertised. I have a WiFi extender ordered so hopefully when it comes in that will help out.
Earlier in the day I was taking video of my son X-country skiing and I know I had recording selected and on (the counter was recording the time) but when I went to review the video there was none. This happened 3 times. Needless to say I was very disappointed. Not sure what happened but when I got home and tried it in the house it worked fine. I'm using an iPhone XR with everything updated so maybe there is some sort of problem. I'll have to try with my old iPhone 7 and see what happens. Anyway, I'll get this sorted through trial and error.
Chris