8Kihara M, Okada T. , A Satellite Selecting Method and Accuracy for the Globle Positioning System Navigation. 1984, (31) 1:8 -20.
9Elliott Kaplan. Understanding GPS Principles and Applications[M].北京:电子工业出版,2002.
10Alexei E. Zinoviev. Using GLONASS in combined GNSS receivers: current status[A].ION GNSS 18th Intemational Teehnical Meeting of the Satellite Division [C ]. Long Beach: The Institute of Navigation, 2005. 1046 - 1057.