CAJ | 학술논문

当接收机可以观测到的卫星数目增加时，多颗卫星同时出错的概率大大增加。传统的接收机自主完善性监测算法（Receiver Autonomous Integrity Monitoring，RAIM）通常用来检测并识别一颗故障卫星，在多颗卫星同时出错时的识别结果并不理想。提出了一种改进的RAIM算法，在奇偶矢量法的基础上，从找出无故障卫星出发，进一步用这些无故障卫星信息进行粗略定位，由接收机的粗略位置来计算各颗卫星的伪距偏差，从而识别出并剔除故障卫星。经仿真验证，该方法可以解决两颗故障卫星时奇偶矢量法中的故障偏差抵消问题。
당접수궤가이관측도적위성수목증가시，다과위성동시출착적개솔대대증가。전통적접수궤자주완선성감측산법（Receiver Autonomous Integrity Monitoring，RAIM）통상용래검측병식별일과고장위성，재다과위성동시출착시적식별결과병불이상。제출료일충개진적RAIM산법，재기우시량법적기출상，종조출무고장위성출발，진일보용저사무고장위성신식진행조략정위，유접수궤적조략위치래계산각과위성적위거편차，종이식별출병척제고장위성。경방진험증，해방법가이해결량과고장위성시기우시량법중적고장편차저소문제。
With more satellites in view, the probability of simultaneous multiple satellites failure increases. The traditional Receiver Autonomous Integrity Monitoring(RAIM)method is usually adopted to detect and exclude one faulty satellite;however, it cannot work in such a multiple satellites failure environment effectively. Based on the parity check, a modified RAIM method for identifying two-faulty satellites is proposed. The modified RAIM finds the satellites without error on pseudo-range and computes the position of GPS receiver with the information of these satellites. And then it calculates the pseudo-range error to identify and exclude the faulty satellites. The simulation results prove that the modified RAIM method is able to solve the failure counteraction caused by the parity vector method.