GPS Reviews

Early GPS device with black and white screen Early GPS devices only gave coordinates.
GPS satellites are much simpler than most people think. They cannot track you. They don’t have comprehensive map databases like Google Earth. In fact, they have no knowledge of anything on the ground.
GPS satellites are just beacons, like lighthouses, that tell you [...]

The FAA Global Navigation Satellite System (GNSS) Program Office provides satellite (GPS) based positioning, navigation, and timing (PNT) services in the United States to enable performance-based (RNP/RNAV) operations for all phases of flight from en route, terminal, approach, and surface navigation. PNT services are an essential enabler required to overcome the deficiencies in today's air [...]

U.S. Policy Statement Regarding GPS Availability, March 21, 2003
* The United States Government recognizes that GPS plays a key role around the world as part of the global information infrastructure and takes seriously the responsibility to provide the best possible service to civil and commercial users worldwide. This is as true in times of conflict [...]

The U.S. Federal Aviation Administration (FAA) uses GPS to synchronize reporting of hazardous weather from its 45 Terminal Doppler Weather Radars located throughout the United States.
Instrumentation is another application that requires precise timing. Distributed networks of instruments that must work together to precisely measure common events require timing sources that can guarantee accuracy at several [...]

The Global Positioning System (GPS) is revolutionizing and revitalizing the way nations operate in space, from guidance systems for crewed vehicles to the management, tracking, and control of communication satellite constellations, to monitoring the Earth from space. Benefits of using GPS include:
Satellite above Earth
Jason-1 Ocean Surface Topography Mission (includes a GPS receiver and a laser [...]

It is estimated that delays from congestion on highways, streets, and transit systems throughout the world result in productivity losses in the hundreds of billions of dollars annually. Other negative effects of congestion include property damage, personal injuries, increased air pollution, and inefficient fuel consumption.
The availability and accuracy of the Global Positioning System (GPS) offers [...]

The Global Positioning System (GPS) has eliminated many of the hazards associated with common recreational activities by providing a capability to determine a precise location. GPS receivers have also broadened the scope and enjoyment of outdoor activities by simplifying many of the traditional problems, such as staying on the “correct trail” or returning to the [...]

Rail systems in many parts of the world use the Global Positioning System (GPS) in combination with various sensors, computers, and communication systems to improve safety, security, and operational effectiveness. These technologies help to reduce accidents, delays, operating costs, and dangerous emissions, while increasing track capacity, customer satisfaction, and cost effectiveness. Integral to the efficient [...]

A critical component of any successful rescue operation is time. Knowing the precise location of landmarks, streets, buildings, emergency service resources, and disaster relief sites reduces that time — and saves lives. This information is critical to disaster relief teams and public safety personnel in order to protect life and reduce property loss. The Global [...]

To sustain the Earth’s environment while balancing human needs requires better decision making with more up-to-date information. Gathering accurate and timely information has been one of the greatest challenges facing both government and private organizations that must make these decisions. The Global Positioning System (GPS) helps to address that need.
Data collection systems provide decision makers [...]