After a short introduction, an overview about the Global Navigation Satellite Systems (GNSS) GPS, GLONASS and Galileo is given. For each system, a status report is presented and then the three main positioning algorithms: Single Point Positioning, Differential Pseudorange and Carrier Phase Positioning are described. In the Summary, the systems are compared and and outlook is given.

The occurrence of cycle slips is a major limiting factor for achievement of sub-decimeter accuracy in positioning with GPS (Global Positioning System). In the past, several authors introduced a method based on different combinations of GPS data together with Kalman filter to solve the problem of the cycle slips. In this paper the same philosophy is used but with discrete wavelet transforms. For...

Nowadays, GPS (Global Positioning System) has been widely used to position airplanes, ships, automobiles, migrating animals, and human beings, etc. However, GPS has its own limitations. Other than the user groups for whom GPS is operated, there is no service level agreement with anyone else. As more and more people become dependant on GPS in more and more countries, the political control of GPS...

In recent times increasing numbers of high-rate GPS stations have been installed around the world and set-up to provide data in real-time. These networks provide a great opportunity to quickly capture surface displacements, which makes them important as potential constituents of earthquake/tsunami monitoring and warning systems. The appropriate GPS real-time data analysis with sufficient accura...

Global Positioning System (GPS) and Inertial Navigation Systems (INS) are used for positioning and attitude determination in a wide range of applications. Since the usage of high performance INS is limited by its high cost, for general application areas low-cost INS units are used. Over the last few years, a number of low-cost inertial sensors have become available. However, these low cost sens...

The Department of Mechanical Engineering and Avionics Engineering Center at Ohio University are developing an electromechanical system for the calibration of an inertial measurement unit (IMU) using global positioning system (GPS) antennas. The GPS antennas and IMU are mounted to a common platform to be oriented in the angular roll, pitch, and yaw motions. Vertical motion is also included to te...

In a network of thousands of nodes, usually densely deployed, it is unlikely that the designer will determine the position of each node. To process sensor data, however, it is necessary to know where the data come from. Equipping every node with a global positioning system (GPS) is currently a costly (in volume, money, and power consumption) solution. Instead, we can estimate node positions rel...