@metropolis Here is a link to
UAV Forecast,. It will tell you How many Visible Sats, Kp index, Est. Sats Locked and weather conditions etc. GPS Elevation Mask is usually not an issue if you are in an area without hills or obstructions. I usually set it to 5. The elevation of a satellite is how high above the horizon it appears to be at a given point in time at your location. GPS satellites that are at low elevation are close to the horizon and are more likely to be obscured by nearby buildings or hills, making it more difficult for your GPS receiver to get a lock. The GPS Elevation Mask lets you count how many satellites are actually visible from your location, by excluding all satellites whose elevations are below the threshold value. Great little app to keep on your phone and check the area you are flying.