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Seamless high-precision positioning and integrity evaluation method for airborne platform

An integrity and high-precision technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., and can solve problems such as abnormal detection of airborne motion states and re-initialization of positioning engines.

Active Publication Date: 2020-01-14
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] In view of the above problems, the present invention proposes a seamless high-precision positioning and integrity evaluation method suitable for airborne platforms. It uses the real-time calculation results of RTK and RTD dual engines to realize the positioning integrity evaluation and airborne positioning of airborne platforms. Abnormal motion detection, designed RTK high-precision positioning unified method and RTK seamless switching method, realize seamless switching of RTK positioning mode during the motion of the airborne platform, and solve the problem of reinitialization of the positioning engine of the airborne platform

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  • Seamless high-precision positioning and integrity evaluation method for airborne platform

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[0064] In order to better illustrate the purpose and advantages of the present invention, below in conjunction with the attached figure 1 The technical scheme of the present invention will be further described. In this specific embodiment, the process of using the airborne platform to move from the short baseline to the medium-long baseline along the operation route will be described as an example (the baseline refers to the horizontal distance between the reference station and the airborne platform). The equipment in the present invention includes: ground GNSS reference station and airborne GNSS high-precision positioning equipment, the schematic diagram is as follows figure 1 As shown, the reference station receives GNSS signals in real time, tracks and captures the carrier phase measurement and pseudorange measurement data, and then sends them to the airborne GNSS high-precision positioning equipment in real time. Based on this, the GNSS high-precision positioning equipment...

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Abstract

The invention discloses a seamless high-precision positioning and integrity evaluation method for an airborne platform, wherein the seamless high-precision positioning and integrity evaluation methodis suitable for fields of airborne platform high-precision navigation positioning and related application. On the basis of the traditional RAIM algorithm, a RTK-RTD double-engine real-time operation result is adopted to realize positioning integrity evaluation and early warning is provided for RTK positioning abnormity caused by wrong fixed ambiguity. Speed and acceleration detection of airborne movement state abnormity based on GNSS Doppler observed quantity estimation is realized; during the movement process of the airborne platform, seamless switching of RTK positioning modes of a short baseline and a medium-long baseline in satellite movement is realized by using wide lane ambiguity as virtual observation, so that a problem that an engine needs to be reinitialized in switching of positioning modes of the airborne platform is solved.

Description

technical field [0001] The invention relates to an airborne GNSS seamless high-precision positioning and integrity assessment method, which belongs to the technical field of precise positioning and positioning integrity assessment in satellite navigation. Background technique [0002] As an important means of airborne platform positioning, GNSS can provide continuous and real-time navigation, positioning and time services. With the urgent demand for high-precision positioning of airborne platforms by optical imaging such as surveying and mapping, reconnaissance and military reconnaissance, RTK ( RealTime Kinematic) technology has gradually become an important form of high-precision positioning of airborne platforms. [0003] At present, with the gradual improvement of power consumption, size and battery life of the airborne platform, its operating range has expanded from the traditional few kilometers to the current tens of kilometers. In order to adapt to the operation unde...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/41G01S19/44
CPCG01S19/41G01S19/44
Inventor 盛传贞张京奎郝青茹应俊俊惠沈盈赵精博
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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