To obtain the absolute position of a target is one of the basic topics for non-cooperated target tracking problems. In this paper, we present a simultaneously calibration method for an Inertial navigation system (INS)/Global position system (GPS)/Laser distance scanner (LDS) integrated system based target positioning approach. The INS/GPS integrated system provides the attitude and position of ...

The concept of using the steering angle sensor to enhance positioning accuracy during Global Positioning System (GPS) outages is the focus of this article. This development of a GPS Micro-Electro-Mechanical Systems Inertial Measurement Unit (MEMS IMU) steering angle sensor vehicular positioning system is discussed in detail including the error dynamics and measurement models as well as integrat...

S/A Selective Availability. Deliberate degradation of GPS signal by U.S. Department of Defense. The practice was discontinued in May 2000. GPS coordinates were expected to be accurate within 100 m with S/A turned on, and about 10 m with S/A off. DGPS improves accuracy in either case.

Existing apriori tropospheric models are not sufficiently accurate to remove tropospheric delay from GPS observations. Remaining effects of residual tropospheric delay need to be estimated to ensure high accuracy and reliability of GPS positioning. Other researchers have shown that implementations of network-based positioning techniques can adequately model the residual tropospheric delay as we...

Generally, accuracy of GPS(Global Positioning System) is higher than that of cellular network. But in tall building urban area or indoor, relatively weak GPS signal makes the positioning unstable and inaccurate. TDOA(Time Difference of Arrival) is one of the most widely used positioning methods in cellular mobile communication systems, but its accuracy is not high enough to meet the growing dem...

This paper deals with the implementation of data mining methods for guiding the path of the ships. The implementation uses a Global Positioning System(GPS) which helps in identifying the area in which the ship is currently navigating. The weather report on that area is compared with the existing database and the decision is made in accordance with the output obtained from the Data Mining techni...

The Global Navigation Satellite System can provide all-day three-dimensional position and speed information. Currently, only using the single navigation system cannot satisfy the requirements of the system's reliability and integrity. In order to improve the reliability and stability of the satellite navigation system, the positioning method by BDS and GPS navigation system is presented, the me...