ioning using single frequency GPS receiver[J]. Acta Geodaetica et Cartographica Sinica, 2005, 34(3): 196-201. [6]李博峰,沈云中. 顾及基线先验信息的GPS模糊度快速解算[J]. 测绘学报,2008,37(4):423-428. LI Bo-feng, SHEN Yun-zhong. Prior baseline information based fast GPS ambiguity resolution[J]. Acta Geodaetica et Cartographica Sinica, 2008, 37(4): 423-428. [7]Frei E, Beutler G. Rapid static positioning based on the fast ambiguity resolution approach ”FARA”: theory and first results[J]. Manuscripta Geodaetica, 1990, 15(4): 325-356. [8]Teunissen P J G. Integer least-squares theory for the pass[J]. Journal of Geodesy, Springer, 2010, 84: 433-447. [9]Paul de Jonge, Tiberius C. The LAMBDA method for integer ambiguity estimation: implementation aspects[R]. LGR-Series Publications of the Delft puting Centre No.12, 1996: 7-37.