Integrity processing method based on least square residual error edge detection

Abstract

The invention discloses an integrity processing method based on least square residual error edge detection. The method comprises steps that 1), the least square residual error corresponding to each satellite is calculated; 2), the least square residual errors corresponding to the satellites are ordered, and the front N1 least square residual errors and the back N2 least square residual errors are selected from the ordered ones and are taken as pre-selected fault satellite detection objects; 3), the pre-selected fault satellites determined in the step 2) are sequentially eliminated one by one, user state least square equation solution is carried out, and corresponding post-detection unit weight mean errors are calculated according to the solved residual errors; and 4), the (N1+N2) post-detection unit weight mean errors acquired in the step 3) through calculation are ordered, and a satellite corresponding to the least root mean square of one least square residual error is the fault satellite. According to the method, strict RAIM integrity guarantee is not required, tests prove that the integrity processing method based on least square residual error edge detection can accurately identify the fault satellite, and the integrity processing method based on least square residual error edge detection is a simple, rapid and effective fault satellite identification method for user clients.

Description

technical field

[0001] The invention relates to the technical field of satellite navigation system application, in particular to an integrity processing method based on least square residual edge inspection. Background technique

[0002] The integrity of satellite navigation originally originated from the requirements of civil aviation users for high reliability of the system. Certain errors in satellites will cause ranging errors, reducing the safety and integrity of users. Especially for some system failures, it takes half an hour or even several hours for ground monitoring stations to find out. As a result, many aviation users will receive and use wrong information from one or several failed satellites, thus making the positioning of these users deviate. At present, its location is tens of kilometers away, which is extremely harmful to navigation safety. It is not allowed for civil aviation applications and must be taken seriously. With the rapid development of the glob...

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