Variation Measurements by VD/GPS Method Over Very Long Baseline

Hiroshi Isshiki, Yukihiro Terada, Keiji Ito, Atsushi Tsuchiya and Teruyuki Kato

Abstract:	A new measuring method using GPS named VD (Variance Detection) method to measure accurately variation component of displacements is proposed. Since initial phase ambiguities do not change with time, the ambiguities may be eliminated by the filtering process. So, it becomes unnecessary to solve the ambiguities when the variation components are the target of the measurement. The calculation and communication loads are drastically reduced, and measurements in high frequency may become possible. VD method consists of PVD (Point precise Variance Detection) and KVD (Kinematics for precise Variance Detection) methods. The former is a single point measurement and the latter a relative measurement. PVD method is suited in measurements in high frequency region, since noises originating from satellites and transmission paths can™t be negligible in low frequency region. On the other hand, KVD method can overcome the defects of PVD method, since it is a relative measurement. KVD method does not use the ambiguity solutions, and it can extend baseline length limit drastically.
Published in:	Proceedings of the 2001 National Technical Meeting of The Institute of Navigation January 22 - 24, 2001 Westin Long Beach Hotel Long Beach, CA
Pages:	596 - 603
Cite this article:	Isshiki, Hiroshi, Terada, Yukihiro, Ito, Keiji, Tsuchiya, Atsushi, Kato, Teruyuki, "Variation Measurements by VD/GPS Method Over Very Long Baseline," Proceedings of the 2001 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 2001, pp. 596-603.
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