Method and device for monitoring delay integrity of troposphere

Abstract

The invention provides a method and device for monitoring the delay integrity of the troposphere. The method comprises the steps: receiving the data information of a plurality of satellites; obtaining the maximum pseudo-range error of the pseudo-range errors of all satellites according to the data information of the plurality of satellites; determining the troposphere horizontal standard deviation of each visible satellite according to the maximum pseudo-range error; calculating and obtaining the troposphere horizontal error of each visible satellite according to the troposphere horizontal standard deviation of each visible satellite; and obtaining the troposphere error of each visible satellite according to the troposphere horizontal error of each visible satellite and the troposphere vertical error of each visible satellite. The method achieves the accurate calculation of the troposphere errors, improves the accuracy of a positioning error correction value obtained by a ground enhancement system, improves the positioning accuracy and integrity of a GPS positioning system when an airplane enters a field and lands, and improves the flight safety of the airplane.

Description

technical field [0001] The invention relates to satellite navigation technology, in particular to a method and device for monitoring tropospheric delay integrity. Background technique [0002] The approach and landing of the aircraft are very important in the whole flight process. In order to improve the positioning accuracy and integrity of the aircraft approach and landing process, many satellite navigation augmentation systems have been developed at home and abroad, mainly divided into wide-area augmentation systems (Wide Area Augmentation System (WAAS for short) and Local Area Augmentation System (LAAS for short), among which the Local Area Augmentation System is also called Ground Based Augmentation System (GBAS for short). The satellite navigation augmentation system is used to provide positioning error correction values ​​for the Global Positioning System (GPS for short), so as to improve the positioning accuracy and perfection of the GPS positioning system. In the s...

AI Technical Summary

Problems solved by technology

[0003] For the tropospheric error, it can generally be divided into vertical error and horizontal error, but the existing technology mainly considers the vertical error when calculating the tropospheric error, and ignores the horizontal error, which makes the calculation of the error of the entire troposphere inaccurate, and many studies have found that , the horizontal error of the troposphere has a certain influence on the error of the ionosphere, which makes the signal error obtained by the satellite navigation augmentation system inaccurate, and the correction value of the positioning error provided to the user is also inaccurate, making it impossible for the aircraft to approach and land. Accurate positioning is achieved, causing the danger of aircraft flight

[0004] Therefore, the tropospheric error calculated by the existing technology is inaccurate, resulting in inaccurate positioning error correction value provided by the satellite navigation augmentation system to the aircraft user, which cannot meet the requirements of accurate positioning of the aircraft during approach and landing.

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