After A Week On Android, Vine Surpasses Instagram On Google Play Charts As Top Social App. After months of speculation, the fate of Waze, the social-mapping-location-data startup, is finally decided: Google is buying the company, giving the search giant a social boost to its already-strong mapping and mobile businesses.
The GPS satellites are not in geo-stationary orbit, but instead orbit twice every time the Earth rotates once. This means that for any observer the satellites appear to orbit once overhead each day.
That is a lot farther than a low Earth orbit, or a relatively close than a high elliptical orbit, so it costs more to get it there. However, then you only need one satellite to do the job and it is on the job 24 hours per day. Weather satellites follow the GEO. Source: Types of Orbits.