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Low-orbit satellite cooperative frequency measurement passive positioning method

A low-orbit satellite, passive positioning technology, applied in the field of satellite positioning, can solve the problem of prolonged positioning time, and achieve the effects of short positioning time, precise positioning, high positioning efficiency and high positioning accuracy

Active Publication Date: 2020-12-22
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology

[0007] When the existing off-orbit single-satellite time-sharing frequency measurement positioning method is used for positioning, it needs to use the measurement information of multiple time periods for positioning, which will result in longer positioning time; Observations are limited

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  • Low-orbit satellite cooperative frequency measurement passive positioning method
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  • Low-orbit satellite cooperative frequency measurement passive positioning method

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Embodiment Construction

[0062] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0063] The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0064] like figure 1 As shown, an embodiment of the present invention provides a low-orbit satellite cooperative frequency measurement passive positioning method, the method includes the following...

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Abstract

The invention discloses a low-orbit satellite cooperative frequency measurement passive positioning method. The method comprises the steps of receiving ground radiation source signals at the same timeby multiple low-earth-orbit satellites and calculating Doppler frequencies corresponding to the ground radiation source signals; calculating a coordinate measurement value of a ground radiation source corresponding to each low-orbit satellite based on the Doppler frequency and orbit data calculated by each low-orbit satellite; calculating an average value of the coordinate measurement values of all the ground radiation sources as an initial coordinate value of the ground radiation sources; based on the initial coordinate value, calculating the position precision intensity value of each low-orbit satellite and the ground radiation sources; calculating weighting coefficients corresponding to all the coordinate measurement values based on the position precision intensity values; and calculating a final coordinate value of the ground radiation source according to the coordinate measurement values of all the ground radiation sources and the corresponding weighting coefficients. According to the low-orbit satellite cooperative frequency measurement passive positioning method, frequency measurement information of a plurality of low-orbit satellites in a low-orbit giant constellation canbe fully utilized, and accurate positioning of a ground radiation source is achieved.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a low-orbit satellite cooperative frequency measurement passive positioning method. Background technique [0002] Satellite positioning technology can be divided into two categories: active positioning technology and passive positioning technology. Active positioning technology refers to a positioning technology in which the positioning system realizes the positioning of the target by transmitting positioning signals. The active positioning technology has the characteristics of high precision and all-weather. Traditional satellite navigation and positioning systems use active positioning technologies, such as the US Global Positioning System (Global Positioning System, GPS), China's BeiDou Navigation Satellite System (BDS), Russia's GLONASS satellite Navigation system (GLOBALNAVIGATION SATELLITE SYSTEM, GLONASS) and European Galileo satellite navigation system (Gal...

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Application Information

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IPC IPC(8): G01S19/46
CPCG01S19/46
Inventor 李献斌杨志玺覃江毅范广腾王建王凯季明江
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI