4GORRES B, CAMPBELL J, SIEMES M, et al. New Anechoic Chamber Results and Comparison with Field and Robot Techniques[ C ] //J IGS Meeting Bern, 2004: 101-125.
5BEUTLER Gerhard, HEIN G W, MELBOURNE W G, et al. Characterizations of GPS User Antennas, Reanalysis and New Results [ J ]. GPS Trends in Precise Terrestrial, Airborne and Spaceborne Applications, IAG Symposia, 1995(115) :1 201-1 231.
