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.
Depending on the job they have to do, we put satellites into different orbits. Some orbit the Sun, but most orbit the Earth. Three very useful types of orbit are a polar orbit, a geostationary orbit (GEO) and a low Earth orbit (LEO). These satellites are in orbit above the Earth's equator. They stay above the same location on Earth. They are used for telecommunications, television transmission and for navigation. Low Earth orbit (LEO) A satellite has a Low Earth Orbit when it orbits somewhere between 300 and 800 km above the Earth's surface. These satellites only take about 90 minutes to go around the Earth. They are ideal for making observations of the Earth's resources.