Indian Regional Navigation Satellite System(IRNSS)has been developed by Indian Space Research Organization(ISRO),to provide the positioning services to the users of the system over Indian region.However,IRNSS does not...Indian Regional Navigation Satellite System(IRNSS)has been developed by Indian Space Research Organization(ISRO),to provide the positioning services to the users of the system over Indian region.However,IRNSS does not provide any integrity warning of the system malfunctioning.Moreover,the satellites of the system are susceptible to faults due to various errors.To monitor the integrity of the position estimate,the faults associated with satellite malfunctioning also have to be detected and carried out at the receiver by developing a suitable Receiver Autonomous Integrity Monitoring(RAIM)technique for fault detection of IRNSS satellites.In this paper,an attempt is made to implement least square(LS)residual-based RAIM for fault detection of IRNSS satellites.LS-based RAIM is robust and used to successfully detect IRNSS satellite measurement faults.The test statistics and test threshold are evaluated from the data acquired from the IRNSS-GPS-SBAS(IGS)receiver installed at(17.39°N,78.31°E)CBIT Hyderabad.It is observed that there is a maximum variation in Horizontal Protection Limit(HPL)ranging from 8 to 172 m for 1F assumed as faulty satellite of IRNSS.展开更多
文摘Indian Regional Navigation Satellite System(IRNSS)has been developed by Indian Space Research Organization(ISRO),to provide the positioning services to the users of the system over Indian region.However,IRNSS does not provide any integrity warning of the system malfunctioning.Moreover,the satellites of the system are susceptible to faults due to various errors.To monitor the integrity of the position estimate,the faults associated with satellite malfunctioning also have to be detected and carried out at the receiver by developing a suitable Receiver Autonomous Integrity Monitoring(RAIM)technique for fault detection of IRNSS satellites.In this paper,an attempt is made to implement least square(LS)residual-based RAIM for fault detection of IRNSS satellites.LS-based RAIM is robust and used to successfully detect IRNSS satellite measurement faults.The test statistics and test threshold are evaluated from the data acquired from the IRNSS-GPS-SBAS(IGS)receiver installed at(17.39°N,78.31°E)CBIT Hyderabad.It is observed that there is a maximum variation in Horizontal Protection Limit(HPL)ranging from 8 to 172 m for 1F assumed as faulty satellite of IRNSS.
