1. Tap the Map Layers Button in the bottom-left corner of the main screen to open the Map Layers Menu. 2. The Map Layers Menu is divided into two sections: My Layers: layers that are currently available for viewing on the map. Layer Library: storage location for layers not regularly used. 3. In the My Layers section, locate the Map Layer GPS Satellite Constellation. There are currently 31 operational satellites in the 24-slot constellation (6 orbits x 4 slots) These satellites orbit in 1 of 6 orbital planes. These planes have an altitude of ~ 20,200 km. Each satellite orbits the Earth twice a day. In 2011, the Air Force completed the “Expandable 24,” a constellation expansion. The Global Positioning System (GPS) was developed by the U.S. Department of Defense. The only system of its kind in the world, GPS uses the transmission of microwave signals from a network of 24 satellites orbiting 12,000 miles above Earth to pinpoint a receiver's location, as well as its speed and direction of travel. When an app---like a map or navigation app, for example---wants to request your location, it doesn't just access your device's GPS radio directly. Instead, it asks your operating system's "Location Services" where you are. Modern Location Services systems use a variety of techniques to find your location. GPS is one of those techniques. Garmin navigators also include map updates with no extra hidden fees. Roads change, new businesses open and close — and drivers need the latest map data available. Garmin GPS devices will prompt drivers when a new update is available so the device can easily be updated with the latest maps. 7. Data privacy. Garmin doesn’t sell your personal GPS can be used to determine the position of each station in a network very precisely, which enables us to determine exactly how much ground movement there was during an earthquake. This information is used to inform models of fault slip. Applications for GPS during earthquakes go further than simply determining the location of a station before GPS Stands for Global Positioning Systems and they are now used throughout the world. A GPS unit is actually a receiver that collects signals from satellites. Global Positioning System satellites transmit signals to GPS receivers on the ground. Receivers require a clear view of the sky, so they are only used outdoors and do not perform well in Pros. It offers a higher level of accuracy than conventional surveying methods. Calculations are made very quickly and with a high degree of accuracy. GPS technology is not bound by constraints such as visibility between stations. Land surveyors can carry GPS components easily for fast, accurate data collection. k6w8R78.