A centralized Cubature information filter algorithm for real time orbit determination by multiple handheld terminals

Abstract

A centralized cubature information filter algorithm by multi-handheld terminals is proposed to improve the real time orbit determination precision. First, nonlinear state and measurement equation of orbit determination is given. Then, cubature transformation is embedded in extended information filter to obtain cubature information filter, the equivalent expression of pseudo measurement matrix is obtained by using the statistical linear error propagation method, and the multi-source observation information fusion process is expressed as accumulation form of local information matrix contribution and information state contribution. Finally, the simulation results verify the effectiveness of the proposed algorithm.