Fusion positioning navigation time service calculating model building method considering satellite navigation intersystem deviation

Abstract

The invention provides a fusion positioning navigation time service calculating model building method considering satellite navigation intersystem deviation. The fusion positioning navigation time service calculating model building method is characterized in that intersystem deviation calibration of a satellite navigation system with respect to a Beidou satellite navigation system can be carried out; the real-time detection during the application of the intersystem deviation can be carried out; the error equation or the constraint condition of the intersystem deviation can be built, and the fusion positioning navigation time service calculating model considering the satellite navigation intersystem deviation can be built, and the result can be detected; The high-precision fusion positioning time service of the Beidou satellite navigation system and other satellite navigation systems can be realized, and the unified navigation positioning result, the unified receiver clock correction, and the intersystem deviation with respect to the Beidou satellite navigation system can be acquired, and in addition, especially in the special environment having the limited number of visible satellites, the calculating effect of improving the precision and the reliability of the navigation positioning can be achieved, and therefore the operability is stronger, the popularization is easy to realize, and the wide industrial application prospect can be provided.

Description

technical field [0001] The invention relates to the technical field of satellite surveying, mapping, navigation and positioning, and in particular to a method for constructing a fusion positioning, navigation and timing calculation model in consideration of deviations between satellite navigation systems. Background technique [0002] At present, there are mainly GPS, GLONASS, Galileo, BeiDou Navigation Satellite System (BDS for short) and other Global Navigation Satellite System (GNSS for short) systems in the world, as well as augmented systems in India and Japan. [0003] Since the multi-satellite navigation system significantly increases the amount of satellite observations visible to users, it greatly improves the continuity, reliability and accuracy of navigation and positioning. The integrated navigation and positioning of multiple GNSS has become the main trend of GNSS application. [0004] However, since each navigation satellite system is dominated by different co...

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Problems solved by technology

[0008] The above two methods have their own obvious shortcomings. Although the fusion algorithm based on the navigation and positioning results of each navigation system is relatively simple, it does not consider the influence of the deviation between the systems on the results; while the tight combination algorithm based on the original observations of each navigation system is Theoretically, it is stricter and the result is more reliable, but there are multiple receiver clock errors, and the observations of several satellite systems have several clock errors. These clock errors are often different, which causes confusion for users. , and the accuracy is still lacking in actual use

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