Method for autonomously monitoring integrity of monitoring stations of global navigation satellite system augmentation system

Abstract

The invention discloses a method for autonomously monitoring the integrity of monitoring stations of a global navigation satellite system augmentation system, which comprises the following steps: receiving a satellite ephemeris and initial satellite data respectively by using each monitoring station of the GNSS augmentation system; transmitting the initial satellite data of each monitoring station to a master control station through a communication network; constructing a single-satellite multi-monitoring-station error equation by using the master control station according to the precise satellite ephemeris and the initial satellite data of each monitoring station; calculating a weight matrix according to different elevating angles of each monitoring station relative to satellites; establishing multi-satellite multi-monitoring-station errors and the weight matrix thereof; constructing a normal equation according to the error equation and the satellite weight matrix and resolving the normal equation according to a least square method; and performing gross error test and gross error identification according to corresponding residual errors so as to realize the autonomous integrity monitoring of the monitoring stations. Through the method, the monitoring stations which may have the errors can be eliminated and the reliability of the whole GNSS augmentation system is improved.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a method for autonomous completeness monitoring of a monitoring station of the global navigation satellite system by using a global navigation satellite system augmentation system. Background technique [0002] The Global Navigation Satellite System (GNSS for short) can realize real-time, continuous and high-precision navigation information such as position, speed and time within the range of land, sea and air all over the world, and has been widely used by various users. GNSS augmentation system is the key technology to enable users to obtain high-precision navigation and positioning results. [0003] In general GNSS augmentation systems such as GPS (Global Positioning System, referred to as GPS) wide-area augmentation system WAAS (Wide Area Augmentation System, referred to as WASS), it is generally composed of the following five parts: Continuously Operating Ground Reference...

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Problems solved by technology

[0034] In view of this, the object of the present invention is to provide a kind of autonomous completeness monitoring method of the global navigation satellite system augmentation system monitoring station, be used to solve the defect that can not guarantee the accuracy of the monitoring station itself in the existing GNSS augmentation system

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