Optimal Allocation Method of Integrity Risk Indicator for Multiple Risk Sources in PPP-RTK

The application of PPP-RTK technology in life safety-related fields has strict requirements for accuracy and integrity, requiring the construction of a complete monitoring and control system for multiple risk sources. Aiming at the lack of authoritative indicator system for multiple risk sources of PPP-RTK integrity services, as well as the traditional average allocation and proportional allocation based on empirical data, which fails to fully consider the needs of various risk source integrity risk indicators, resulting in the difficulty of ensuring the availability of overall monitoring of risk sources, this paper proposes an optimal allocation method for multiple risk source integrity risk indicators for PPP-RTK integrity services. Based on the theory of multiple hypothetical solution separation, this method obtains multiple risk source integrity risk indicators by assigning and adjusting the risk indicators of the integrity of various risk sources to make the virtual protection level of the positioning domain equal. Simulation experiments show that compared with the traditional method, this method realizes the construction of multiple risk source index systems that match the requirements of risk source integrity indicators. At the same time, this paper tests the availability of risk source integrated monitoring by 1 times, 1.5 times and 2 standard deviations, and the results show that the availability of the proposed method is increased by 1.38%, 9.75% and 12.72%, respectively.