A dual-mode satellite fusion positioning method suitable for ship traffic management system

A technology for ship traffic management and fusion positioning, applied in the field of dual-mode satellite fusion positioning, which can solve the problems of inability to obtain positioning results and guarantee optimality, and achieve improved safety and fault tolerance, reduced complexity, and improved positioning accuracy. Effect

Active Publication Date: 2022-05-31
中船鹏力(南京)大气海洋信息系统有限公司 +1
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Problems solved by technology

In this case, the least squares method commonly used before cannot guarantee its optimality, and cannot obtain the optimal positioning result, which requires the weighted least squares method to improve the positioning accuracy

Method used

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  • A dual-mode satellite fusion positioning method suitable for ship traffic management system
  • A dual-mode satellite fusion positioning method suitable for ship traffic management system
  • A dual-mode satellite fusion positioning method suitable for ship traffic management system

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Embodiment Construction

2

are expressed as:

[0068]

In formula (3), f

1

and f

2

respectively represent the two different carrier frequencies of the satellite signal.

If this satellite is Beidou satellite, then receive B1I signal and B3I signal, its carrier frequency is respectively 1561.098MHz

and 1268.520MHz; if the satellite is a GPS satellite, it will receive L1 signal and L5 signal, and its carrier frequencies are

1575.42MHz and 1176.45MHz.

Then, two equations in formula (1) are subtracted, and formula (3) is substituted into the equation after the subtraction, eliminating 40.28N

e

,

After finishing, the ionospheric delay error model can be obtained, as shown below:

[0072]

Then, the ionospheric delay 1 shown in formula (4)

1

and I

2

Substitute into the following formula:

[0074]

Thus, the pseudorange measurement value after the ionospheric delay correction is obtained as follows:

[0076]

[0077] In formula (5), it represents the pseudorange measurement value...

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Abstract

The invention discloses a dual-mode satellite fusion positioning method suitable for a ship traffic management system. The dual-mode fusion of Beidou and GPS is carried out to realize accurate, real-time and reliable positioning of ships. The main steps include: firstly, establishing satellite dual-frequency pseudo-range Error correction model; then according to the ephemeris data, the spatial position coordinates of Beidou satellites and GPS satellites are respectively calculated, and the time-space conversion and unification of the dual systems are performed; then the Beidou and GPS dual-mode pseudo-range positioning calculations are performed, and the ship position is initially calculated; Then calculate the altitude angle of each satellite relative to the ship; then establish a multi-weight model based on the satellite system category, signal-to-noise ratio, and altitude angle; The spatial position coordinates at time t of the current observation epoch. The present invention has higher positioning accuracy, smaller algorithm complexity and stronger system security.

Description

A dual-mode satellite fusion positioning method suitable for ship traffic management system technical field The present invention relates to the field of ship navigation and positioning, particularly a kind of dual-mode satellite suitable for ship traffic management system Fusion localization method. Background technique [0002] The vigorous development of my country's social economy and the solid advancement of the "marine power" strategy have driven the increase in the volume of water transportation. Year by year, the number of ships has increased dramatically. This has also led to prominent ship traffic pressure, increased resource consumption and water environment. A series of problems such as pollution have caused severe challenges to ship traffic, energy and environment. In order to effectively solve the above problems Many scholars have started the research on Vessel Traffic Services (VTS), aiming to Improve traffic conditions with the help of advanced navi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S19/40G01S19/33
CPCG01S19/423G01S19/40G01S19/33
Inventor 夏亮夏金峰金家龙王子骏周晓安盛开
Owner 中船鹏力(南京)大气海洋信息系统有限公司
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