【摘 要】
：
Ambiguity validation is a critical step in the quality control of ambiguity resolution.It is realized by the so-called integer aperture (IA) estimator.In order to apply the IA estimation into practice
【机 构】
：
National University of Defense Technology, Changsha, China
论文部分内容阅读
Ambiguity validation is a critical step in the quality control of ambiguity resolution.It is realized by the so-called integer aperture (IA) estimator.In order to apply the IA estimation into practice,fixed failure rate approach was proposed.For instantaneous applications,the look-up table for an IA estimator can be created and applied.However,due to the time load in creating look-up table,only ratio test is feasible until now.Besides this,there is no evaluation standard for the quality of look-up table.In order to tackle these problems,this contribution will propose a simplified instantaneous and controllable ambiguity resolution method,which can be applied to linear IA estimators which can be approximated by analytical probability formulas.This method is easy to be implemented and can realize the instantaneous control to failure rates.In order to verify the effectiveness of this method,simulation experiments are implemented to test the performances of four linear IA estimators.Furthermore,this method is applied into GNSS compass application.Simulation and field test results show that the linear IA estimation based on this method can realize the quality control of ambiguity resolution,and the precision of GNSS compass can be improved.In GNSS compass field test,W-test IA estimator has a little better performance in improving the precision of heading than ratio test and other linear IA estimators.All results prove the effec-tiveness of IA estimation in the quality control of ambiguity resolution for the first time and provide the guidelines for the usage of IA estimators.
其他文献
The international GNSS Monitoring and Assessment System (iGMAS) is developed as a service platform for multi-GNSS and the Product Integration and Service Center (ISC) is the products reprocess center
Geomagnetic storm activity will cause a certain degree of disturbance on the global ionosphere,ionospheric model error which is one of the main error sources of satellite navigation system will affect
The triangulation location is the same mathematical principles of the Global Navigation Satellite Systems (GNSS) and the double-star positioning system,and the range between the navigation satellite a
For the tight integration of GPS and the Strong-Motion records,in order to obtain high precision co-seismic waves,theprecise separation of the moving state and the baseline shift is much important and
In view of the present problems of BDS receiver in the indoor weak signal environments is faced with strong signal attenuation,the NLOS propagation,cross-correlation effects,the A-BDS coarse-time navi
In this paper,a novel unambiguous W2 CCRW multipath mitigation algorithm is applied to BOC (n,n) signals.We investigate a novel BOC (n,n) ambiguous tracking method with W2 CCRW (Code Correlation Refer
Navigation signal based on compound carrier (NSCC),the novel modulation scheme for navigation augmentation,hasthe special multi-carrier structure and flexible structure parameters,which enables it pos
This paper evaluates the precision of iGMAS orbit and clock products,and analyzes their consistency.By the methods of orbit comparisons and day boundary discontinuities (DBDs),the iGMAS orbit precisio
Numerical integration assumes that accelerations at each node are continuous and smooth.However,when satellite enters into shadow,perturbation caused by solar radiation pressure will jump.Therefore,ma
Vision based navigation has been widely accepted as a promising approach to obtain position and orientation information in GNSS-denied environments.However,due to the complexity of such environment,a