Abstract:

Considering the effects of the amplitude/phase inconsistencies between different channels, the manufacture bias of the baseline and the installation bias of the baseline on the rotating long baseline interferometer (RLBI) location system, a mathematical model of these biases is proposed. The equivalent of the rotating baseline bias and the horizontal rotation shaft bias are proved. After that, the computing method of the theory localization error and the biases which may cause the distinct localization error is given. Finally, this paper proposes a joint Gauss-Newton bias estimation method based on calibration sources with known positions. The simulation indicates this method can achieve the Cramer-Rao lower bound (CRLB) and a single calibration source can improve the localization performance obviously.