초록 ▼

An improved analyzing system based on GIPSY-OASIS II software package developed at the Jet Propulsion Laboratory for Global Positioning System, general satellite tracking, orbit determination and trajectory studies. New features and functions include yaw compensation, precise satellite positioning b

An improved analyzing system based on GIPSY-OASIS II software package developed at the Jet Propulsion Laboratory for Global Positioning System, general satellite tracking, orbit determination and trajectory studies. New features and functions include yaw compensation, precise satellite positioning by high-rate GPS clocks, enhanced data filtering and smoothing, a new user interface for controlling orientation of a satellite and its components, and no-fiducial approach to global geodesy. The present invention allows a fully automatic operation and delivery of validated daily solutions for orbits, clocks, station locations and others with no human intervention. A 3D GPS orbit accuracy of 15 cm and the daily repeatability of the 3D global geocentric station location in better than 1 cm have been achieved.

대표청구항 ▼

[ What is claimed is:] [1.] A method for GPS positioning, comprising:collecting broadcast signals of a plurality of earth-orbiting satellites with a plurality of earth-fixed receivers, said broadcast signals being indicative of timing and positioning of said satellites;converting said broadcast sign

[ What is claimed is:] [1.] A method for GPS positioning, comprising:collecting broadcast signals of a plurality of earth-orbiting satellites with a plurality of earth-fixed receivers, said broadcast signals being indicative of timing and positioning of said satellites;converting said broadcast signals into raw data in digital form;editing said raw data to remove an amount of data points based on a data selection criterion and to detect carrier phase breaks therein based on a phase criterion, thus producing refined data indicative of pseudoranges of said satellites;computing a plurality of forces acting on said satellites;estimating effects of earth geometric factors and a plurality of transmitting delays of said broadcast signals;performing a yaw compensation on yawing of said satellites according to orbital positions of said satellites;computing orbiting trajectories of said satellites by using a priori model and said refined data with information indicative of said forces, said effects of earth geometric factors, said transmitting delays, and said yawing;processing said refined data by Kalman-type filtering according to said orbiting trajectories of said satellites so as to produce updated data having information indicative of said timing and said positioning of satellites;predicting orbits of said satellites with said updated data and information from said yaw compensation to produce updated orbits of said satellites; andverifying said updated orbits of said satellites.