Carrier to noise ratio weighted algorithm in GPS single epoch single frequency attitude determination

In GPS attitude determination system to deal with the problem that the traditional elevation weighted algorithm can't reflect the situation of occlusion effectively, the accuracy of carrier phase by the satellite carrier to noise ratio of receiver is analyzed in this paper, and a new algorithm based on weighted matrix W is proposed. In the new algorithm, the least-squares (ILS) are used to estimate ambiguity and baseline vector. The proposed algorithm can improve the success rate under situation when satellite signal is weak and precision of carrier phase is low. By comparative experiments, it is verified the rationality and effectiveness of the proposed algorithm. Simulation results show that the proposed CN0 weighted algorithm can increase the success rate of single epoch attitude determination by 5 percent compared to the traditional algorithm, 1~2 percent compared to the elevation weighted algorithm.