Next generation GPS receivers will take advantage of Spatial processing from a Controlled Reception Pattern Antenna (CRPA) and Ultra-Tightly-Coupled (UTC) and Tightly–Coupled GPS/inertial signal processing to improve their robustness to interference and their performance in a multipath environment. This introduces the potential for failure modes to be introduced into the GPS solution from the S...

Next generation high anti-jam GPS receivers will take advantage of Ultra-Tightly-Coupled (UTC) GPS/inertial signal processing to improve their anti-jam robustness. UTC signal processing uses the inertial observations to aid the GPS receiver correlation channels and extend the period over which the coherent correlator outputs can be accumulated. For UTC tracking to operate, the residual carrier ...

Resolving the GPS carrier-phase ambiguities has been a continuing challenge for sub-centimeter-level high-precision GPS positioning. In kinematic and long-baseline applications, the challenge turns out to be even greater due to the substantial problems in the observation time series – the decorrelation of biases, the quasi-random behavior of multipath and the correct interpretation of receiver ...

Software-based GPS (SGR) Receiver helps us processing the GPS signal at the lowest level of GPS raw signal data from the antenna. A software-based GPS receiver consists of a front-end device that converts the radio frequency signal from the antenna to an intermediate frequency in digital format. The signal thus converted is processed by high level programming language to compute position and ve...

The GPS antenna is the connecting component between the GPS satellite and the GPS receiver. Its function is to transfer the satellite signal propagation to the receiver with minimum interruption. A satisfactory process is expected to result in an accurate and reliable performance of the GPS receiver. Multipath error is a dominant error source connected with GPS positioning. Mitigation of such e...

This work studies the sudden increases in total electron content of the ionosphere caused by the very intense solar flare on July 14, 2000. Total electron content (TEC) data observed from a Global Positioning System (GPS) network are used to calculate the flare-induced TEC increment, dTECf, and variation rate, dTECf/dt. It is found that both dTECf/dt and dTECf are closely related with the solar...

Micro-Electro-Mechanical Sensor (MEMS) inertial navigation sensors (INS) and GPS are attractive technologies for low-cost navigation applications. In the loosely-coupled integration schemes, GPS provides the position and velocity for real-time correction of the inertial sensor errors as well as the navigation parameters of the MEMS-INS. As an efficient estimation algorithm, the Kalman filter (K...