The internal GPS receiver in some tablets doesn't always provide reliable lock-on in all aircraft cabins. Two new satellite receivers -- from Bad Elf and Global Nav Systems -- solve this problem. Aviation Consumer's Larry Anglisano has a look at them in this AVweb video.
This is a companion discussion topic for the original entry at https://www.avweb.com/avionics/video-two-new-satellite-receivers-for-cockpit-tablets