A couple of updates to my recent Google Earth GPS-satellite visibility animation:
Firstly, you can now change the viewing location to anywhere on Earth.  To do this, right click on the Location folder (with the blue dot) in the side panel and select Refresh.  The animation will then centre on the current view.
Secondly, the visualization displays a Screen [...]

Time for a new KML animation!
The idea of this one is to plot out simulated GPS (Global Positioning System) satellite movements onto Google Earth, and simultaneously show how many are visible from a specific location at a particular time.  
GPS receivers need to be able to see several of these to return accurate location fixes. This animation shows that [...]