A fast deployment method based on satellite-based augmentation system

Abstract

The invention provides a rapid station deployment method based on a satellite-based augmentation system, which belongs to the technical field of satellite navigation. Including: first set the user information, set the SBAS service area, the number of GMSs in the SBAS service area, the required GMS location and satellite constellation in the SBAS service area; use the set user information as a constraint, and set the ephemeris, satellite The GMS layout optimization objective function required by the clock correction number calculation and the GMS layout optimization objective function required by the ionospheric delay correction number calculation are solved; when solving, according to the two optimization objective functions, the GMS layout is determined to achieve the entire satellite-based enhancement. System site layout optimization process. By setting initial conditions such as the number of stations and the location of the required stations, and solving by an optimization algorithm, the invention not only ensures the calculation requirements of the ephemeris and star clock differential correction number, but also satisfies the ionospheric delay correction and calculation process to the ionospheric penetration. Demand for through-point distribution.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, and in particular relates to a method for optimizing the layout of ground monitoring stations of a multi-constellation and multi-region satellite-based augmentation system. Background technique [0002] Modern satellite navigation systems have become an important space infrastructure for obtaining high-precision navigation and positioning information. With the continuous promotion and deepening of the application of satellite navigation systems, the existing Global Navigation Satellite System (GNSS) cannot meet the needs of some high-end users in terms of positioning accuracy, usability, and integrity, such as civil aviation users. usage requirements. In order to enable GNSS to reliably serve the fields of civil air transportation, military aviation navigation, and homeland security, and to improve the integrity function of GNSS, the Radio Technical Commission for Aeronautics (RTCA)...

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Problems solved by technology

[0006] Satellite-based augmentation systems such as WAAS in the United States and EGNOS in Europe have been built and used for many years (references [3] and [4]), but there has been no public literature reporting how to select the GMS in the augmentation system

Only a very small number of scholars in China have conducted research on integrity algorithms for the construction of SBAS, and there are few discussions on how to select and layout GMS in the process of integrity algorithm research.

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