Abstract:For the issue of rank deficiency in single-frequency single-epoch ambiguity resolution, a regularization matrix constraining coordinate correction parameters is constructed by singular value decomposition on coefficient matrix of double-differenced carrier phase observation equations, in order to improve the ill-condition of normal equation. Single-epoch ambiguity fixed solutions are then acquired using the LAMBDA method. Compared with fitting method of weights, the results indicate that for a 5.8m baseline, the ambiguity resolution success rate of BDS is increased by 17.61%, while the GPS, BDS and GPS/BDS of 2.34 km are increased by 4.67%, 3.56% and 3.63%, respectively. In addition, positioning precision in the East and North reaches the millimeter and millimeter to centimeter levels in Up , when the cut-off elevation angle of satellites is taken as 10°.
WANG Jing,ZHAO Xingwang,LIU Chao et al. Single-Frequency Single-Epoch Ambiguity Resolution for Combined GPS/BDS Based on Regularization[J]. jgg, 2016, 36(12): 1083-1088.