GPS Reviews

The United States is modernizing GPS through a program that will improve its civilian service in the next decade and beyond. For many critical safety-of-life applications, GPS service alone may not meet the requirements of
* Integrity – the ability of a system to provide timely warnings to users when the system [...]

The Global Positioning System (GPS) was designed as a dual-use system with the primary purpose of enhancing the effectiveness of U.S. and allied military forces. GPS is rapidly becoming an integral component of the emerging Global Information Infrastructure, with applications ranging from mapping and surveying to international air traffic management and global change research. The [...]

The National Executive Committee for Space-Based Positioning, Navigation, and Timing (PNT) is a U.S. Government organization established by Presidential directive to advise and coordinate federal departments and agencies on matters concerning the Global Positioning System (GPS) and related systems.
The National Executive Committee is chaired jointly by the Deputy Secretaries of Defense and Transportation. Its membership [...]

In addition to longitude, latitude, and altitude, the Global Positioning System (GPS) provides a critical fourth dimension – time. Each GPS satellite contains multiple atomic clocks that contribute very precise time data to the GPS signals. GPS receivers decode these signals, effectively synchronizing each receiver to the atomic clocks. This enables users to determine the [...]

The Global Positioning System consists of three segments: the space segment, control segment, and user segment, commonly known as user equipment. The communication boundaries that exist between the GPS and other systems, as well as within the GPS itself, are known as interfaces.
Interfaces are documented in Interface Control Documents (ICDs). ICDs are the formal means [...]

Augmentation Systems
A GPS augmentation is any system that aids GPS by providing accuracy, integrity, availability, or any other improvement to positioning, navigation, and timing that is not inherently part of GPS itself.
A wide range of different augmentation systems have been developed by both the public and private sectors. To meet specific requirements, the U.S. Government [...]

Augmentation Systems
A GPS augmentation is any system that aids GPS by providing accuracy, integrity, availability, or any other improvement to positioning, navigation, and timing that is not inherently part of GPS itself.
A wide range of different augmentation systems have been developed by both the public and private sectors. To meet specific requirements, the U.S. Government [...]

Augmentation Systems
A GPS augmentation is any system that aids GPS by providing accuracy, integrity, availability, or any other improvement to positioning, navigation, and timing that is not inherently part of GPS itself.
A wide range of different augmentation systems have been developed by both the public and private sectors. To meet specific requirements, the U.S. Government [...]

What is GPS?
The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services. This system consists of three segments: the space segment, the control segment, and the user segment. The U.S. Air Force develops, maintains, and operates the space and control segments.
Space Segment
The space segment consists of [...]

The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides reliable positioning, navigation, and timing services to civilian users on a continuous worldwide basis — freely available to all. For anyone with a GPS receiver, the system will provide location and time. GPS provides accurate location and time information for an unlimited [...]