8Wubbena, G. (1985), Software Developments for Geodetic Positioning with GPS Using TI 4100Code and Carrier Measurements, in Proceedings First International Symposium on Precise Posi - tioning with the Global Positioning System, edited by Clyde Goad, pp. 403 - 412, US Department of Commerce, Rockville, Maryland.
9A|ber C, Ware R, Rocken C, et al. Obtaining single path phase delays from GPS double differences [ J ]. Geophysical Research Letter,2000,7(2) : 661 664.