Long-Term Repeatability of GPS Measurements Determined with GSI Precise Ephemerides

Abstract

Baseline vectors on Takayama-Hachijo baseline (412 km) were determined from daily GPS measurements using the GSI precise ephemerides. Results were compared with those determined using broadcast ephemerides in the period from April 1992 to January 1993. Longterm repeatability for ten months were improved to 14 mm (3.4×10^-8) from 18 mm in N-S component, to 22 mm (5.3×10^-8) from 57 mm in E-W, and to 63 mm (1.5×10^-7) from 117 mm in U-D.