High-precision ocean dynamic reference station construction method and system

Abstract

The invention discloses a high-precision ocean dynamic reference station construction method and system, and relates to the technical field of ocean positioning. According to the high-precision ocean dynamic base station construction method and system, a base station data acquisition module, a base station screening module, a base station positioning model construction module, a base station positioning evaluation module and a base station positioning correction module are arranged, and motion characteristics and environmental factors of an ocean dynamic base station are analyzed; the method can identify and reduce factors influencing the positioning result, thereby reducing the positioning error, obtaining the screening index of the ocean dynamic reference station, screening the ocean dynamic reference station, achieving the screening and optimization of the ocean dynamic reference station, selecting the ocean dynamic reference station with a proper position and good signal quality, and improving the positioning accuracy. The precision and stability of the positioning system are improved, and meanwhile, the ocean high-precision positioning service is provided by constructing an ocean dynamic base station positioning model.

Description

Technical Field

[0001] The present invention relates to the technical field of marine positioning, and particularly to a method and system for constructing a high-precision marine dynamic reference station. Background Art

[0002] With the increasing attention and utilization of marine resources by people, the marine economy has developed rapidly. The demand for high-precision positioning services in fields such as marine engineering, marine energy development, fisheries, and shipping is increasing.

[0003] At the same time, with the progress of technology, especially in positioning technology and data processing technology, the accuracy and reliability of marine dynamic reference stations have been significantly improved. Modern technologies such as multi-constellation global navigation satellite systems, precise point positioning, and high-precision antenna technology have made it possible to perform high-precision positioning in harsh environments. The development of these technologies has driven the demand for advanced marine dynamic reference station positioning systems and promoted innovation in scientific research and the marine industry.

[0004] However, the traditional positioning method for coastal dynamic reference stations has difficulties in the construction and maintenance of reference stations in the marine environment, low positioning accuracy, insufficient drift error correction, and fails to fully consider the influence of the marine environment and the motion characteristics of floating platforms on positioning accuracy, resulting in unstable positioning data, and relying on complex data processing and manual intervention, leading to low efficiency and errors. At the same time, the construction and maintenance costs of the static and dynamic reference station network database are high, making it difficult to apply to high-precision marine positioning services. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method and system for constructing a high-precision marine dynamic reference station, which solves the problems in the above background art.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: A high-precision marine dynamic reference station construction system, including the following modules: a reference station data acquisition module, a reference station screening module, a reference station positioning model construction module, a reference station positioning evaluation module, and a reference station positioning correction module; the reference station data acquisition module is used to obtain marine dynamic reference station monitoring data through a floating platform; the reference station screening module is used to analyze the motion characteristics and environmental factors of the marine dynamic reference station based on the marine dynamic reference station monitoring data, obtain a marine dynamic reference station screening index, and screen the marine dynamic reference station; the reference station positioning model construction module is used to construct a marine dynamic reference station positioning model through the screened marine dynamic reference stations to provide high-precision marine positioning services; the reference station positioning evaluation module is used to position the sea surface positioning reference station through the marine dynamic reference station positioning model, evaluate the positioning coordinates of the marine dynamic reference station, and obtain a marine dynamic reference station positioning model accuracy index; the reference station positioning correction module is used to analyze the marine dynamic reference station positioning model accuracy index, obtain a marine dynamic reference station positioning compliance index, and when the marine dynamic reference station positioning compliance index exceeds the standard range of the marine dynamic reference station positioning compliance index, correct the marine dynamic reference station positioning model through a filtering algorithm.

[0007] Further, the marine dynamic reference station monitoring data includes marine dynamic reference station motion data and marine dynamic reference station environmental data; the marine dynamic reference station motion data includes the longitude value of the marine dynamic reference station, the latitude value of the marine dynamic reference station, the horizontal speed of the marine dynamic reference station, and the vertical speed of the marine dynamic reference station; the marine dynamic reference station environmental data includes the environmental water flow speed of the marine dynamic reference station, the environmental wind force value of the marine dynamic reference station, and the environmental temperature value of the sea water of the marine dynamic reference station.

[0008] Further, the specific process of analyzing the motion characteristics of the marine dynamic reference station is as follows: Based on the marine dynamic reference station motion data, calculate the Euclidean distance between the longitude value and latitude value of each marine dynamic reference station and the optimal longitude value and optimal latitude value of the marine dynamic reference station to obtain the distance value of each marine dynamic reference station from the optimal position, and perform a ratio operation on the distance value of each marine dynamic reference station from the optimal position and the maximum allowable distance value of the marine dynamic reference station from the optimal position to obtain a marine dynamic reference station position change index; normalize the horizontal speed and vertical speed of the marine dynamic reference station, and assign weights to the normalized horizontal speed and vertical speed of the marine dynamic reference station, and perform a comprehensive operation to obtain a marine dynamic reference station speed index; perform a comprehensive operation on the marine dynamic reference station position change index and the marine dynamic reference station speed index to obtain a marine dynamic reference station motion screening index.

[0009] Further, the specific process of analyzing the environmental factors of the marine dynamic reference station is as follows: Based on the environmental data of the marine dynamic reference station, the environmental water flow velocity, environmental wind force value, and environmental temperature value of each marine dynamic reference station are respectively compared with the maximum allowable values of the environmental water flow velocity, environmental wind force value, and environmental temperature value of the set marine dynamic reference station, and normalized to obtain the environmental screening index of the marine dynamic reference station.

[0010] Further, the specific process of obtaining the screening index of the marine dynamic reference station is as follows: Based on the motion screening index and environmental screening index of the marine dynamic reference station, the motion screening index and environmental screening index of the marine dynamic reference station are respectively subjected to ratio operations with the standard values of the motion screening index and environmental screening index of the set marine dynamic reference station; a comparison matrix is established for the motion screening index and environmental screening index of the marine dynamic reference station through the analytic hierarchy process, and the weight vector is obtained and comprehensively calculated to obtain the screening index of the marine dynamic reference station.

[0011] Further, the specific formula for the screening index of the marine dynamic reference station is as follows: In the formula, represents the screening index of the marine dynamic reference station, represents the motion screening index of the marine dynamic reference station, represents the standard value of the motion screening index of the marine dynamic reference station, represents the environmental screening index of the marine dynamic reference station, represents the standard value of the environmental screening index of the marine dynamic reference station, represents the weight factor of the motion screening index of the marine dynamic reference station, represents the weight factor of the environmental screening index of the marine dynamic reference station.

[0012] Further, the specific process of screening the marine dynamic reference station is as follows: Compare the screening index of the marine dynamic reference station with the standard value of the screening index of the set marine dynamic reference station. When the screening index of the marine dynamic reference station exceeds the threshold value of the screening index of the set marine dynamic reference station, then the marine dynamic reference station is screened out.

[0013] Further, the specific process of constructing the positioning model of the marine dynamic reference station is as follows: Obtain GPS positioning service data from the selected marine dynamic reference stations and integrate it into the dataset. Fit the GPS positioning service data in the dataset through a regression model, and use the backpropagation algorithm and optimizer to adjust the model parameters to construct the positioning model of the marine dynamic reference station and obtain the positioning service.

[0014] Further, the specific process of evaluating the positioning coordinates of the marine dynamic reference station and obtaining the accuracy index of the positioning model of the marine dynamic reference station is as follows: Locate the sea surface positioning reference station through the positioning model of the marine dynamic reference station to obtain the positioning coordinate value of the sea surface positioning reference station of the positioning model of the marine dynamic reference station. Obtain the accurate coordinate value of the sea surface positioning reference station through the sea surface positioning reference station; Calculate the Euclidean distance between the positioning coordinate value of the sea surface positioning reference station of the positioning model of the marine dynamic reference station and the accurate coordinate value of the sea surface positioning reference station; Obtain the distance deviation value between the positioning coordinate value of the sea surface positioning reference station of the positioning model of the marine dynamic reference station and the accurate coordinate value of the sea surface positioning reference station, and perform a ratio operation with the set allowable deviation value of the sea surface positioning distance to obtain the accuracy index of the positioning model of the marine dynamic reference station.

[0015] A method for constructing a high-precision marine dynamic reference station includes the following steps: S1. Obtain the monitoring data of the marine dynamic reference station through a floating platform; S2. Based on the monitoring data of the marine dynamic reference station, analyze the motion characteristics and environmental factors of the marine dynamic reference station to obtain the screening index of the marine dynamic reference station and screen the marine dynamic reference station; S3. Through the selected marine dynamic reference stations, construct the positioning model of the marine dynamic reference station to provide high-precision marine positioning services; S4. Locate the sea surface positioning reference station through the positioning model of the marine dynamic reference station and evaluate the positioning coordinates of the marine dynamic reference station to obtain the accuracy index of the positioning model of the marine dynamic reference station; S5. Analyze the accuracy index of the positioning model of the marine dynamic reference station to obtain the positioning compliance index of the marine dynamic reference station. If the positioning compliance index of the marine dynamic reference station exceeds the standard range of the positioning compliance index of the marine dynamic reference station, correct the positioning model of the marine dynamic reference station through a filtering algorithm.

[0016] The present invention has the following beneficial effects: (1). The high-precision marine dynamic reference station construction system reduces the need for manual intervention through an automated processing flow by setting up a reference station data acquisition module, a reference station screening module, a reference station positioning model construction module, a reference station positioning evaluation module, and a reference station positioning correction module. This can reduce the need for static reference stations, thereby lowering the construction and maintenance costs of the reference station network database. At the same time, it improves the flexibility and applicability of the positioning system. Through the integration of multi-marine dynamic reference station data and model optimization, it enhances the real-time performance and stability of the positioning service, constructs a marine dynamic reference station positioning model, and provides high-precision marine positioning services.

[0017] (2). The high-precision marine dynamic reference station construction method can identify and reduce factors affecting the positioning results by analyzing the motion characteristics and environmental factors of marine dynamic reference stations, thereby reducing positioning errors. It obtains a screening index for marine dynamic reference stations and screens the marine dynamic reference stations to achieve the screening and optimization of marine dynamic reference stations, selecting reference stations with suitable locations and good signal quality, and improving the accuracy and stability of the positioning system.

[0018] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flowchart of a high-precision marine dynamic reference station construction system according to the present invention.

[0020] Figure 2 It is a flowchart of a high-precision marine dynamic reference station construction method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] In the embodiments of the present application, a high-precision marine dynamic reference station construction method and system solve the problems of insufficient positioning accuracy in the coastal dynamic reference station positioning method and high construction and maintenance costs of the static and dynamic reference station network database.

[0022] The general idea for the problems in the embodiments of the present application is as follows: Obtain the monitoring data of marine dynamic reference stations through a floating platform, analyze the motion characteristics and environmental factors of marine dynamic reference stations, obtain a screening index for marine dynamic reference stations, and screen the marine dynamic reference stations.

[0023] Through the screened marine dynamic reference stations, construct a marine dynamic reference station positioning model to provide high-precision marine positioning services.

[0024] Locate the sea surface positioning reference station through the marine dynamic reference station positioning model, evaluate the positioning coordinates of the marine dynamic reference stations, and obtain the precise index of the marine dynamic reference station positioning model.

[0025] Analyze the accuracy index of the positioning model of the marine dynamic reference station to obtain the positioning compliance index of the marine dynamic reference station. When the positioning compliance index of the marine dynamic reference station exceeds the standard range of the positioning compliance index of the marine dynamic reference station, correct the positioning model of the marine dynamic reference station through a filtering algorithm.

[0026] Please refer to Figure 1 , an embodiment of the present invention provides a technical solution: a high-precision marine dynamic reference station construction system, including the following modules: a reference station data acquisition module, a reference station screening module, a reference station positioning model construction module, a reference station positioning evaluation module, and a reference station positioning correction module; the reference station data acquisition module is used to obtain the monitoring data of the marine dynamic reference station through a floating platform; the reference station screening module is used to analyze the motion characteristics and environmental factors of the marine dynamic reference station based on the monitoring data of the marine dynamic reference station, obtain the screening index of the marine dynamic reference station, and screen the marine dynamic reference station; the reference station positioning model construction module is used to construct a positioning model of the marine dynamic reference station through the screened marine dynamic reference station to provide high-precision marine positioning services; the reference station positioning evaluation module is used to position the sea surface positioning reference station through the positioning model of the marine dynamic reference station, evaluate the positioning coordinates of the marine dynamic reference station, and obtain the accuracy index of the positioning model of the marine dynamic reference station; the reference station positioning correction module is used to analyze the accuracy index of the positioning model of the marine dynamic reference station to obtain the positioning compliance index of the marine dynamic reference station. When the positioning compliance index of the marine dynamic reference station exceeds the standard range of the positioning compliance index of the marine dynamic reference station, correct the positioning model of the marine dynamic reference station through a filtering algorithm.

[0027] In this implementation plan, in the deep - sea area of the ocean, the lack of public network coverage makes it impossible to use CORS stations for RTK high - precision positioning. In the system, through multi - constellation GNSS systems and precise point positioning (PPP) technical means, higher - precision positioning is achieved. PPP precise point positioning is a high - precision positioning technology based on a single GNSS receiver, which can obtain centimeter - level or even sub - centimeter - level positioning accuracy through precise calculation of satellite observation data. The PPP technology provides high - precision positioning results by obtaining the navigation messages of GNSS satellites, precise ephemeris data, and high - precision meteorological data in real - time and performing strict error correction. The position change error caused by factors such as wind, waves, and tides on the floating platform can be corrected in real - time through the inertial navigation system (INS) providing high - frequency motion state data, which is fused with GNSS data through filtering algorithms such as Kalman filtering. In addition, the differential correction data provided by the dynamic buoy network and the accurate tide and ocean current models are used to further correct the error caused by the position change of the platform. A floating platform refers to a platform that can float freely in the ocean, usually composed of buoys, pontoons, or ships, etc. Various sensors and devices are usually installed on these floating platforms to collect marine environmental data and monitor relevant information of the marine dynamic reference station; Marine dynamic reference station: This refers to a positioning station that moves with factors such as water flow and tides in the marine environment and is used to provide positioning services. After the reference station screening module obtains the monitoring data of the marine dynamic reference station, the reference stations are screened through this module, and the qualified reference stations are selected; After the reference station positioning model construction module selects the qualified reference stations, the positioning model is constructed using the monitoring data of these reference stations. The reference station positioning evaluation module evaluates the performance of the positioning model. When the reference station positioning correction module evaluates and finds that there are deviations or errors in the positioning model, the model is corrected, and filtering algorithms are used to smooth the data.

[0028] Specifically, the monitoring data of the marine dynamic reference station includes the motion data of the marine dynamic reference station and the environmental data of the marine dynamic reference station; the motion data of the marine dynamic reference station includes the longitude value of the marine dynamic reference station, the latitude value of the marine dynamic reference station, the horizontal speed of the marine dynamic reference station, and the vertical speed of the marine dynamic reference station; the environmental data of the marine dynamic reference station includes the environmental water flow speed of the marine dynamic reference station, the environmental wind force value of the marine dynamic reference station, and the environmental temperature value of the sea water at the marine dynamic reference station.

[0029] In this implementation plan, the longitude value and latitude value of the ocean dynamic reference station are the geographical coordinates of the location of the reference station, represented by longitude and latitude; the horizontal speed of the ocean dynamic reference station represents the speed at which the reference station moves in the horizontal direction, and the vertical speed represents the speed at which the reference station moves in the vertical direction, that is, the speed at which the ocean dynamic reference station rises or falls relative to the water surface; the environmental wind force value of the ocean dynamic reference station refers to the magnitude of the wind force in the ocean, usually represented by the wind force level or wind speed. Wind force also has a certain impact on the stability and movement trajectory of the ocean dynamic reference station. The environmental temperature value of the ocean dynamic reference station in seawater is the temperature of the seawater, which is one of the important parameters of the ocean environment and has an impact on the ocean ecosystem and ocean climate.

[0030] Specifically, the specific process of analyzing the motion characteristics of the ocean dynamic reference station is as follows: Based on the motion data of the ocean dynamic reference station, calculate the Euclidean distance between the longitude value and latitude value of each ocean dynamic reference station and the optimal longitude value and optimal latitude value of the ocean dynamic reference station to obtain the distance value of each ocean dynamic reference station from the optimal position. Perform a ratio operation on the distance value of each ocean dynamic reference station from the optimal position and the maximum allowable value of the distance value of the ocean dynamic reference station from the optimal position to obtain the position change index of the ocean dynamic reference station; normalize the horizontal speed and vertical speed of the ocean dynamic reference station, and assign weights to the normalized horizontal speed and vertical speed of the ocean dynamic reference station, and perform a comprehensive operation to obtain the speed index of the ocean dynamic reference station; perform a comprehensive operation on the position change index and speed index of the ocean dynamic reference station to obtain the motion screening index of the ocean dynamic reference station.

[0031] In this implementation plan, each ocean dynamic reference station is numbered in sequence as , and the specific formula for the position change index of the ocean dynamic reference station is as follows: ; In the formula, represents the position change index of the a-th ocean dynamic reference station, used to evaluate the position change of the ocean dynamic reference station, represents the longitude value of the a-th ocean dynamic reference station, represents the latitude value of the ocean dynamic reference station, represents the optimal longitude value of the a-th ocean dynamic reference station, represents the optimal latitude value of the a-th ocean dynamic reference station, Denote the maximum allowable distance value of the marine dynamic reference station from the optimal position, which is used to measure the allowable distance of the marine dynamic reference station from the optimal position. Let \(a\) denote the serial number of the marine dynamic reference station. The maximum allowable distance value of the marine dynamic reference station from the optimal position, the optimal longitude value of the marine dynamic reference station, and the optimal latitude value of the marine dynamic reference station are measured by professional positioning personnel. Normalize the horizontal speed and vertical speed of the marine dynamic reference station to obtain the normalized horizontal speed value and the normalized vertical speed value of the marine dynamic reference station. The specific formula for the speed index of the marine dynamic reference station is as follows: ; In the formula, denotes the speed index of the marine dynamic reference station, which is used to evaluate the speed of the marine dynamic reference station, denotes the normalized horizontal speed value of the \(a\)-th marine dynamic reference station, denotes the normalized vertical speed value of the \(a\)-th marine dynamic reference station, denotes the weight factor of the normalized horizontal speed value of the marine dynamic reference station, indicating the influence degree of the normalized horizontal speed value of the marine dynamic reference station on the speed index of the marine dynamic reference station, denotes the weight factor of the normalized vertical speed value of the marine dynamic reference station, indicating the influence degree of the normalized vertical speed value of the marine dynamic reference station on the speed index of the marine dynamic reference station. In addition to filtering and data processing of the original motion data to extract the motion signals within a specific frequency range to obtain the motion screening index of the marine dynamic reference station, the motion screening index of the marine dynamic reference station can also be calculated through the following calculation formula. The specific formula for the motion screening index of the marine dynamic reference station is as follows: ; In the formula, denotes the motion screening index of the marine dynamic reference station, which is used to measure the screening degree of the marine dynamic reference station, denotes the position change index of the marine dynamic reference station, denotes the speed index of the marine dynamic reference station, denotes the weight factor of the position change index of the marine dynamic reference station, denotes the weight factor of the speed index of the marine dynamic reference station.

[0032] Specifically, the specific process of analyzing the environmental factors of the marine dynamic reference station is as follows: Based on the environmental data of the marine dynamic reference station, compare and normalize the environmental water flow speed, environmental wind force value, and environmental temperature value of the marine dynamic reference station with the maximum allowable values of the environmental water flow speed, environmental wind force value, and environmental temperature value allowed for the marine dynamic reference station, respectively, to obtain the environmental screening index of the marine dynamic reference station.

[0033] In this implementation plan, in addition to using statistical analysis methods or establishing environmental models to predict the changing trend of the marine environment and obtain the environmental screening index of the marine dynamic reference station, the environmental screening index of the marine dynamic reference station can also be calculated through the following calculation formula. The specific formula for the environmental screening index of the marine dynamic reference station is as follows: ; In the formula, represents the environmental screening index of the marine dynamic reference station, which is used to represent the degree of environmental screening of the marine dynamic reference station, represents the environmental water flow velocity of the marine dynamic reference station, represents the environmental wind force value of the marine dynamic reference station, represents the environmental temperature value of the marine dynamic reference station, represents the maximum allowable value of the environmental water flow velocity of the marine dynamic reference station, represents the maximum allowable value of the environmental wind force value of the marine dynamic reference station, represents the maximum allowable value of the environmental temperature value of the marine dynamic reference station, represents the weight factor of the environmental water flow velocity of the marine dynamic reference station, represents the weight factor of the environmental wind force value of the marine dynamic reference station, represents the weight factor of the environmental temperature value of the marine dynamic reference station, .

[0034] Specifically, the specific process of obtaining the screening index of the marine dynamic reference station is as follows: Based on the motion screening index of the marine dynamic reference station and the environmental screening index of the marine dynamic reference station, the motion screening index of the marine dynamic reference station and the environmental screening index of the marine dynamic reference station are respectively subjected to ratio operations with the set standard values of the motion screening index of the marine dynamic reference station and the standard values of the environmental screening index of the marine dynamic reference station; A comparison matrix is established for the motion screening index of the marine dynamic reference station and the environmental screening index of the marine dynamic reference station through the analytic hierarchy process, and the weight vector is obtained and a comprehensive operation is performed to obtain the screening index of the marine dynamic reference station.

[0035] In this implementation scheme, by performing a ratio operation on the two with a set standard value, the comprehensive performance evaluation of the ocean dynamic reference station is achieved. Compared with the traditional method that only considers the evaluation of a single factor, this comprehensive evaluation method is more comprehensive and accurate; the analytic hierarchy process is used to establish a comparison matrix for the motion screening index and the environmental screening index of the ocean dynamic reference station, and the weight vector is obtained through the analytic hierarchy process, so that the importance of each factor in the comprehensive evaluation can be objectively determined, improving the scientificity and credibility of the evaluation results; the standard values of the set motion screening index and environmental screening index of the ocean dynamic reference station are introduced, so that the evaluation results can be compared with the pre-determined standards, better understanding the performance of the ocean dynamic reference station. Through comprehensive calculation, the motion screening index and the environmental screening index of the ocean dynamic reference station are combined to obtain the final screening index of the ocean dynamic reference station, which can intuitively reflect the overall performance level of the ocean dynamic reference station and provide a basis for subsequent decision-making and applications.

[0036] Specifically, in addition to using big data analysis technology and machine learning algorithms, combining historical data and real-time monitoring data to establish a prediction model to evaluate the screening index of the ocean dynamic reference station, the screening index of the ocean dynamic reference station can also be calculated through the following calculation formula. The specific formula for the screening index of the ocean dynamic reference station is as follows: ; In the formula, represents the screening index of the ocean dynamic reference station, represents the motion screening index of the ocean dynamic reference station, represents the standard value of the motion screening index of the ocean dynamic reference station, represents the environmental screening index of the ocean dynamic reference station, represents the standard value of the environmental screening index of the ocean dynamic reference station, represents the weight factor of the motion screening index of the ocean dynamic reference station, represents the weight factor of the environmental screening index of the ocean dynamic reference station.

[0037] In this implementation scheme, the analytic hierarchy process is used to establish a comparison matrix for the motion screening index and the environmental screening index of the ocean dynamic reference station, and the weight vector is obtained through the analytic hierarchy process to obtain the weight factor of the motion screening index of the ocean dynamic reference station and the weight factor of the environmental screening index of the ocean dynamic reference station, indicating the importance of the motion screening index and the environmental screening index of the ocean dynamic reference station in the overall evaluation.

[0038] Specifically, the specific process of screening the ocean dynamic reference station is as follows: compare the screening index of the ocean dynamic reference station with the set standard value of the screening index of the ocean dynamic reference station. When the screening index of the ocean dynamic reference station exceeds the set threshold of the screening index of the ocean dynamic reference station, then the ocean dynamic reference station is screened out.

[0039] In this implementation scheme, the standard value of the set screening index of the marine dynamic reference station is introduced as the basis for evaluation, so that the evaluation results can be compared with the pre-determined standards, and the performance of the marine dynamic reference station can be better understood. This way of setting the standard value helps to improve the scientificity and objectivity of the evaluation results; by setting the threshold of the screening index of the marine dynamic reference station, the marine dynamic reference station is screened out only when its screening index exceeds the threshold. Such a setting can be adjusted according to the actual situation, screened more flexibly, and the accuracy and effectiveness of the screening are improved; it is applicable to screening a large number of marine dynamic reference stations. By comparing the screening index of the marine dynamic reference station with the standard value, the marine dynamic reference station can be quickly and effectively screened out, thus improving the screening efficiency.

[0040] Specifically, the specific process of constructing the positioning model of the marine dynamic reference station is as follows: Obtain GPS positioning service data from the screened marine dynamic reference stations and integrate it into the dataset. Fit the GPS positioning service data in the dataset through a regression model, and use the backpropagation algorithm and optimizer to adjust the model parameters to construct the positioning model of the marine dynamic reference station and obtain the positioning service.

[0041] In this implementation scheme, GPS positioning service data is collected from the screened marine dynamic reference stations. These data include the location information, signal strength, and timestamp of the base station. These data will be used to train and validate the positioning model; the collected GPS positioning service data is integrated into a dataset to ensure the consistency and integrity of the data. It includes data cleaning, preprocessing, and feature engineering steps to prepare the data for model training; select an appropriate regression model to fit the GPS positioning service data in the dataset; by fitting the data, the model can learn the relationship between the location information and other features; use the backpropagation algorithm and optimizer to adjust the parameters of the model so that the model performs better on the training data. The backpropagation algorithm calculates the gradient of the loss function with respect to the model parameters, and then uses the optimizer to update the model parameters to minimize the loss function; after adjusting the parameters through multiple iterations, the positioning model of the marine dynamic reference station is obtained.

[0042] Specifically, the specific process of evaluating the positioning coordinates of the marine dynamic reference station and obtaining the precise index of the marine dynamic reference station positioning model is as follows: The positioning of the sea surface positioning reference station is performed through the marine dynamic reference station positioning model to obtain the positioning coordinate values of the sea surface positioning reference station of the marine dynamic reference station positioning model. The accurate coordinate values of the sea surface positioning reference station are obtained through the sea surface positioning reference station; The Euclidean distance calculation is performed on the positioning coordinate values of the sea surface positioning reference station of the marine dynamic reference station positioning model and the accurate coordinate values of the sea surface positioning reference station; The distance deviation value between the positioning coordinate values of the sea surface positioning reference station of the marine dynamic reference station positioning model and the accurate coordinate values of the sea surface positioning reference station is obtained, and a ratio operation is performed with the set allowable deviation value of the sea surface positioning distance to obtain the precise index of the marine dynamic reference station positioning model.

[0043] In this implementation plan, in addition to predicting environmental changes or the stability of the reference station by analyzing various environmental factors and the movement characteristics of the dynamic reference station to obtain the precise index of the marine dynamic reference station positioning model, the precise index of the marine dynamic reference station positioning model can also be calculated through the following calculation formula. The specific calculation formula of the precise index of the marine dynamic reference station positioning model is as follows: ; In the formula, represents the precise index of the marine dynamic reference station positioning model, which is used to measure the precision of the marine dynamic reference station positioning model. represents the Euclidean distance between the positioning coordinate values of the sea surface positioning reference station of the marine dynamic reference station positioning model and the accurate coordinate values of the sea surface positioning reference station. represents the set allowable deviation value of the sea surface positioning distance. The Euclidean distance between the positioning coordinates output by the marine dynamic reference station positioning model and the actual sea surface positioning reference station coordinates. The Euclidean distance refers to the straight-line distance between two points in Euclidean space and is used to evaluate the accuracy of positioning.

[0044] Please refer to Figure 2, A method for constructing a high-precision marine dynamic reference station, comprising the following steps: S1. Obtain the monitoring data of the marine dynamic reference station through a floating platform; S2. Based on the monitoring data of the marine dynamic reference station, analyze the motion characteristics and environmental factors of the marine dynamic reference station, obtain the screening index of the marine dynamic reference station, and screen the marine dynamic reference station; S3. Through the screened marine dynamic reference station, construct a positioning model of the marine dynamic reference station to provide high-precision marine positioning services; S4. Locate the sea surface positioning reference station through the positioning model of the marine dynamic reference station, and evaluate the positioning coordinates of the marine dynamic reference station to obtain the precise index of the positioning model of the marine dynamic reference station; S5. Analyze the precise index of the positioning model of the marine dynamic reference station to obtain the positioning compliance index of the marine dynamic reference station. If the positioning compliance index of the marine dynamic reference station exceeds the standard range of the positioning compliance index of the marine dynamic reference station, correct the positioning model of the marine dynamic reference station through a filtering algorithm.

[0045] In this implementation plan, the specific process of calculating the positioning compliance index of the marine dynamic reference station is as follows through the following calculation formula: ; In the formula, represents the positioning compliance index of the marine dynamic reference station, which is used to measure the positioning compliance degree of the marine dynamic reference station, represents the precise index of the positioning model of the marine dynamic reference station, represents the standard value of the precise index of the positioning model of the marine dynamic reference station, which is used to represent the ideal standard value of the precise index of the specified positioning model, represents the allowable deviation value of the precise index of the positioning model of the marine dynamic reference station, which is used to represent the allowable deviation range of the precise index of the specified positioning model. When the positioning compliance index of the marine dynamic reference station exceeds the standard range of the positioning compliance index of the marine dynamic reference station, initialize the filter, use the current positioning result as the initial state, restart the filtering process, run the filtering algorithm again, compare the Euclidean distance between the positioning coordinate value of the sea surface positioning reference station of the positioning model of the marine dynamic reference station after re-initialization and the accurate value of the sea surface positioning reference station coordinates with the allowable deviation value of the sea surface positioning distance, and correct the position and speed of the marine dynamic reference station.

[0046] In summary, this application has at least the following effects: A method and system for constructing a high-precision marine dynamic reference station. By setting up a reference station data acquisition module, a reference station screening module, a reference station positioning model construction module, a reference station positioning evaluation module, and a reference station positioning correction module, the motion characteristics and environmental factors of the marine dynamic reference station are analyzed, factors that affect the positioning result can be identified and reduced, thereby reducing the positioning error, obtaining a screening index for the marine dynamic reference station, screening the marine dynamic reference station, realizing the screening and optimization of the marine dynamic reference station, selecting a reference station with a suitable location and good signal quality, improving the accuracy and stability of the positioning system, realizing the screening and optimization of the marine dynamic reference station, selecting a reference station with a suitable location and good signal quality, and improving the accuracy and stability of the positioning system.

[0047] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0048] The present invention is described with reference to the flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or multiple flows and / or blocks

[0049] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or multiple flows and / or blocks

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus, causing a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process, so that the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one process or a plurality of processes and / or blocks Figure 1 one process or a plurality of processes and / or blocks Figure 1 or steps of the functions specified in a block or a plurality of blocks.

[0051] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to cover the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A high-precision marine dynamic reference station construction system, characterized in that: It includes the following modules: base station data acquisition module, base station screening module, base station positioning model building module, base station positioning evaluation module, and base station positioning correction module; The reference station data acquisition module is used to acquire marine dynamic reference station monitoring data through a floating platform; The reference station screening module is used to analyze the motion characteristics and environmental factors of the ocean dynamic reference station based on the ocean dynamic reference station monitoring data, obtain the ocean dynamic reference station screening index, and screen the ocean dynamic reference station; The reference station positioning model building module is used to build an ocean dynamic reference station positioning model through the screened ocean dynamic reference stations to provide ocean high-precision positioning services; The reference station positioning evaluation module is used to locate the sea surface positioning reference station through the ocean dynamic reference station positioning model, evaluate the positioning coordinates of the ocean dynamic reference station, and obtain the accuracy index of the ocean dynamic reference station positioning model; The reference station positioning correction module is used to analyze the accuracy index of the ocean dynamic reference station positioning model and obtain the ocean dynamic reference station positioning compliance index. If the ocean dynamic reference station positioning compliance index exceeds the standard range of the ocean dynamic reference station positioning compliance index, the ocean dynamic reference station positioning model is corrected through a filtering algorithm.

2. A high-precision marine dynamic reference station construction system according to claim 1, characterized in that: The ocean dynamic reference station monitoring data includes ocean dynamic reference station motion data and ocean dynamic reference station environmental data; The ocean dynamic reference station motion data includes the ocean dynamic reference station longitude value, the ocean dynamic reference station latitude value, the ocean dynamic reference station horizontal speed and the ocean dynamic reference station vertical speed; The ocean dynamic reference station environment data includes the ocean dynamic reference station environment water flow velocity, the ocean dynamic reference station environment wind force value and the ocean dynamic reference station environment temperature value of seawater.

3. A high-precision marine dynamic reference station construction system according to claim 2, characterized in that: The specific process of analyzing the motion characteristics of the ocean dynamic reference station is as follows: Based on the motion data of the ocean dynamic reference station, the longitude value and latitude value of each ocean dynamic reference station are calculated with the optimal longitude value and latitude value of the ocean dynamic reference station to obtain the distance value of each ocean dynamic reference station from the optimal position, and the distance value of each ocean dynamic reference station from the optimal position is calculated with the maximum value allowed by the distance value of the ocean dynamic reference station from the optimal position to obtain the ocean dynamic reference station position change index; The horizontal speed and vertical speed of the ocean dynamic reference station are normalized, and weights are assigned to the normalized horizontal speed and vertical speed of the ocean dynamic reference station, and a comprehensive calculation is performed to obtain the speed index of the ocean dynamic reference station; The ocean dynamic reference station position change index and the ocean dynamic reference station speed index are comprehensively calculated to obtain the ocean dynamic reference station motion screening index.

4. A high-precision marine dynamic reference station construction system according to claim 2, characterized in that: The specific process of analyzing the environmental factors of the ocean dynamic reference station is as follows: Based on the environmental data of the ocean dynamic reference station, the environmental water flow velocity, environmental wind force value and environmental temperature value of the ocean dynamic reference station are compared and normalized with the set maximum allowable values ​​of the environmental water flow velocity, environmental wind force and environmental temperature of the ocean dynamic reference station, respectively, to obtain the environmental screening index of the ocean dynamic reference station.

5. A high-precision marine dynamic reference station construction system according to claim 4, characterized in that: The specific process of obtaining the ocean dynamic reference station screening index is as follows: Based on the ocean dynamic reference station motion screening index and the ocean dynamic reference station environment screening index, the ocean dynamic reference station motion screening index and the ocean dynamic reference station environment screening index are respectively compared with the set standard value of the ocean dynamic reference station motion screening index and the standard value of the ocean dynamic reference station environment screening index; The comparison matrix of the ocean dynamic reference station motion screening index and the ocean dynamic reference station environment screening index is established through the hierarchical analysis method, and the weight vector is obtained and the ocean dynamic reference station screening index is obtained through comprehensive calculation.

6. A high-precision marine dynamic reference station construction system according to claim 5, characterized in that: The specific formula for the ocean dynamic reference station screening index is as follows: ; In the formula, represents the ocean dynamic reference station screening index, represents the ocean dynamic reference station motion screening index, represents the standard value of the ocean dynamic reference station motion screening index, represents the environmental screening index of the ocean dynamic reference station, It represents the standard value of the environmental screening index of the ocean dynamic reference station. represents the weight factor of the ocean dynamic reference station motion screening index, Represents the weight factor of the environmental screening index of the ocean dynamic reference station.

7. A high-precision marine dynamic reference station construction system according to claim 6, characterized in that: The specific process of screening the ocean dynamic reference stations is as follows: The ocean dynamic reference station screening index is compared with the set standard value of the ocean dynamic reference station screening index. When the ocean dynamic reference station screening index exceeds the set threshold value of the ocean dynamic reference station screening index, the ocean dynamic reference station is screened out.

8. A high-precision marine dynamic reference station construction system according to claim 7, characterized in that: The specific process of constructing the marine dynamic reference station positioning model is as follows: The GPS positioning service data is obtained from the screened ocean dynamic reference stations and integrated into the data set. The GPS positioning service data in the data set is fitted through the regression model, and the back propagation algorithm and optimizer are used to adjust the model parameters to build the ocean dynamic reference station positioning model and obtain positioning services.

9. A high-precision marine dynamic reference station construction system according to claim 8, characterized in that: The specific process of evaluating the positioning coordinates of the ocean dynamic reference station and obtaining the accuracy index of the positioning model of the ocean dynamic reference station is as follows: The sea surface positioning reference station is positioned through the ocean dynamic reference station positioning model, the sea surface positioning reference station positioning coordinate value of the ocean dynamic reference station positioning model is obtained, and the accurate value of the sea surface positioning reference station coordinate is obtained through the sea surface positioning reference station; The Euclidean distance calculation is performed between the positioning coordinate value of the sea surface positioning reference station of the ocean dynamic reference station positioning model and the accurate value of the sea surface positioning reference station coordinate; the distance deviation value between the positioning coordinate value of the sea surface positioning reference station of the ocean dynamic reference station positioning model and the accurate value of the sea surface positioning reference station coordinate is obtained, and the ratio operation is performed with the set sea surface positioning distance allowable deviation value to obtain the accuracy index of the ocean dynamic reference station positioning model.

10. A high-precision ocean dynamic reference station construction method, applied to a high-precision ocean dynamic reference station construction system according to any one of claims 1 to 9, comprising the following steps: S1. Obtain ocean dynamic base station monitoring data through floating platform; S2. Based on the monitoring data of the ocean dynamic reference station, analyze the motion characteristics and environmental factors of the ocean dynamic reference station, obtain the ocean dynamic reference station screening index, and screen the ocean dynamic reference station; S3. Construct an ocean dynamic reference station positioning model through the selected ocean dynamic reference stations to provide ocean high-precision positioning services; S4. Position the sea surface positioning reference station through the ocean dynamic reference station positioning model, evaluate the positioning coordinates of the ocean dynamic reference station, and obtain the accuracy index of the ocean dynamic reference station positioning model; S5. Analyze the accuracy index of the ocean dynamic reference station positioning model to obtain the ocean dynamic reference station positioning compliance index. If the ocean dynamic reference station positioning compliance index exceeds the standard range of the ocean dynamic reference station positioning compliance index, correct the ocean dynamic reference station positioning model through a filtering algorithm.

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