I've seen accessories where they actually sell Antennas that you put on top of your Vehicle so you can have warm Fingers by Flying your drone in Cold Temps from the Comfort of your Car!! lol For instance here's one... http://amzn.to/2mSAsUT
It is very rare for UAV Forecast to show only 6 satellites in the sky. What is your location? Can you send me a screenshot which includes your location and shows the 6 satellites? The data is derived from regularly updated ephemeris data of the orbits of GPS satellites and is very reliable. However, a lot depends on how much of the sky you can see from your location. If you are surrounded by tall buildings, you are not going to be able to establish direct line-of-sight to all the satellites that are above the horizon. This is the purpose of the "GPS Elevation Mask" setting in the app and on the site. If the app is showing only 6 satellites available, it is possible you are using too high a value for this GPS Elevation Mask. Ideally, you'd set it to the average angle of the buildings around you relative to the horizon, i.e. when surrounded by tall buildings, set it to 20 or 30 degrees; when in an open field with a full view of the sky, set it to 0 or 5 degrees.