jgg     2007 27 (1):  107-111    ISSN: 0412-1961  CN: 21-1139/TG HVF METHOD AND ITS APPLICATION IN THE STUDY ON GPS MULTIPATH EFFECTS Zhou Xiaowei; Dai Wujiao; Zhu Jianjun; and Zou Zhengrong Department of Survey Engineering and Geomatics, Central South University, Changsha 410083 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null