A novel method of map matching using the Global Positioning System (GPS) has been developed for civilian use, which uses digital mapping data to infer the <100 meters systematic position errors which result largely from “selective availability” (S/A) imposed by the U.S. military. A method of rapidly detecting inappropriate road centrelines from the set of all possible road centre-lines that a v...

Estimating its ego-motion is one of the most important capabilities for an autonomous mobile platform. Without reliable ego-motion estimation no long-term navigation is possible. Besides odometry, inertial sensors, DGPS, laser range finders and so on, vision based algorithms can contribute a lot of information. In this paper, we want to give an integrated overview of stereo odometry. We want to...

Because of the integer-valued nature of carrier phase ambiguities, it is essential to fix the float estimates into integer values in order for high precision DGPS positioning. A decorrelation process is necessary to solve the problem since double-differenced ambiguities are highly correlated in general. In this paper, Block Decorrelation Method (BDM) is presented and tested for its convergence....

This study deals with the viability of using a designed geometrical model consists of plane, polar coordinates (PC) and span length in the determination of bridges deformation. The data of a Tianjin Yonghe bridge located in the southern part of China as collected by RTK-DGPS technique and Accelerometer were used in the analysis. Kalman filter and fast Fourier transformation (FFT) analyses were ...

This paper examines several topics that are important for designing a system for direct-georeferencing by means of INS/DGPS in the airborne environment. The subjects to be discussed are sensor placement, sensor synchronization, system calibration and the initial alignment. Although the nature of some of these problems may be more practical, their significance may equal or exceed the importance ...

Precision agriculture involves very accurate f a r m vehicle control along recorded paths, which are no t necessarily straight lines. In this paper, we investigate the possibility of achieving this task wi th a CP-DGPS as the unique sensor. T h e vehicle heading is derived according t o a K a l m a n state reconstructor, and a nonlinear velocity independent control law i s designed, relying o n...