A GNSS-based dynamic measurement method and system for elevation control networks

Abstract

This invention discloses a GNSS-based dynamic measurement method and system for elevation control networks. The method includes: during elevation control network resurvey, acquiring the geoid differences of each node of the elevation control network relative to the stable elevation starting point; performing phased synchronous GNSS observations on the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node; and calculating the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point, the geoid differences, and the real-time geodetic height of each node. By utilizing GNSS technology to achieve high-precision dynamic measurement of the elevation control network, this invention solves the shortcomings of using leveling surveys for maintaining elevation control networks, such as station-by-station transmission, large number of personnel, high cost, low efficiency, and long time consumption. It improves operational efficiency, reduces the number of personnel, and enables the maintenance accuracy of the elevation control network to reach the same level as leveling network resurveys.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a dynamic measurement method and system for GNSS-based elevation control networks. Background Technology

[0002] Currently, leveling is the only technical means to establish an elevation control network. Although satellite navigation and positioning technology (GNSS) is widely used and has a strong trend of replacing conventional geodetic surveying methods, it still cannot replace precise leveling in terms of precise elevation transfer. Over the years, my country has done a great deal of work in the establishment, maintenance, and application services of elevation control networks.

[0003] For a long time, leveling has been one of the most important methods for establishing and maintaining geodetic benchmarks, and it is also the most costly project in terms of manpower and material resources. Due to the influence of various factors such as crustal movement, urban construction, groundwater extraction, and mineral resource development, many regions in my country have experienced varying degrees of land subsidence. In order to provide timely elevation data to national economic construction and scientific research departments, elevation control networks at all levels must be regularly remeasured to ensure that the results of the elevation control networks can reflect the true situation of ground elevation.

[0004] The current elevation control network primarily relies on leveling surveying techniques for elevation transfer. Leveling, also known as geometric leveling, is a method of determining the elevation difference between two points on the ground using a level instrument and a leveling rod. A level instrument is set up between two points on the ground, and the leveling rods erected at the two points are observed. The elevation difference between the two points is calculated based on the readings on the rods. Typically, starting from the leveling origin or any known elevation point, leveling observations are conducted station by station along a selected leveling route, determining the elevation of each leveling marker. For example... Figure 1 As shown, a leveling network consists of multiple leveling routes. Starting from a known elevation point (the stable elevation datum point), leveling instruments are set up station by station to conduct leveling measurements, transferring the elevation values ​​of the known point to each leveling point. The leveling routes form closed or connected routes. Leveling network data processing is then carried out to calculate the adjusted elevations of the leveling points. Figure 1 In the diagram, the rhombus points represent the starting points for stable elevation calculations, and the origin is the node of the elevation control network, also known as the leveling point. The re-measurement of the elevation control network involves measuring the latest normal elevation of each leveling point. Using a leveling measurement mode, the measurement must begin from the elevation starting point, with leveling instruments set up station by station to transfer the elevation from the starting point to each node. The triangles in the diagram represent the various stations along the leveling route. Summary of the Invention

[0005] The purpose of this invention is to provide a GNSS-based dynamic measurement method and system for elevation control networks. By utilizing GNSS technology, it achieves high-precision dynamic maintenance of elevation control networks, solving the inherent defects of existing technologies that use leveling surveys for elevation control network maintenance, such as station-by-station transmission, large number of personnel, high economic costs, low work efficiency, and long operation time. It reduces the maintenance cost and operation time of elevation control networks, improves operation efficiency, reduces the number of personnel, and enables the maintenance accuracy of elevation control networks to reach the same level as leveling network re-measurement.

[0006] To address the aforementioned technical problems, a first aspect of this invention provides a dynamic measurement method for GNSS-based elevation control networks, comprising the following steps:

[0007] During the resurvey of the elevation control network, the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point is obtained.

[0008] The stable elevation starting point and each node are subjected to phased synchronous GNSS observations to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node;

[0009] Based on the normal elevation and real-time geodetic elevation of the stable elevation starting point, and the elevation anomaly difference and real-time geodetic elevation of each node, the real-time normal elevation of each node is calculated.

[0010] Furthermore, obtaining the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point includes:

[0011] Leveling network observations were performed on the stable elevation starting point and each node to obtain the normal elevation of each node after adjustment.

[0012] The stable elevation starting point and each node are observed by a full network of GNSS to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node;

[0013] Based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment, the elevation anomaly difference of each node relative to the stable elevation starting point is obtained.

[0014] Furthermore, the step of obtaining the adjusted normal height of each node by performing leveling network observations on the stable elevation starting point and each node includes:

[0015] Starting from the stable elevation reference point, the elevation is transferred station by station using the leveling measurement mode to obtain the elevation difference observation value of each leveling section;

[0016] Perform leveling network adjustment calculations to obtain the normal heights of each node after adjustment.

[0017] Further, the step of obtaining the geodetic height of the stable elevation starting point and the geodetic height of each node by performing full-network GNSS observations on the stable elevation starting point and each node includes:

[0018] The stable elevation starting point and each node are subjected to phased synchronous GNSS observations.

[0019] The geodetic height of the stable elevation starting point and the geodetic height of each node are calculated from the GNSS measurement data of the GNSS reference station and each node.

[0020] Accordingly, a second aspect of the present invention provides a GNSS-based dynamic measurement system for elevation control networks, comprising:

[0021] The acquisition module is used to acquire the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point during the resurvey of the elevation control network.

[0022] The measurement module is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node.

[0023] The calculation module is used to calculate the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node.

[0024] Furthermore, the acquisition module includes:

[0025] The first measurement submodule is used to perform leveling network observations on the stable elevation starting point and each node to obtain the normal height of each node after adjustment.

[0026] The second measurement submodule is used to perform full-network GNSS observations on the stable elevation starting point and each node to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node;

[0027] The calculation submodule is used to obtain the elevation anomaly difference of each node relative to the stable elevation starting point based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment.

[0028] Furthermore, the first measurement submodule includes:

[0029] The first measurement unit is used to start from the stable elevation starting point, and to transfer the elevation station by station using the leveling measurement mode to obtain the elevation difference observation value of each leveling section.

[0030] The first calculation unit is used to perform leveling network adjustment calculations to obtain the normal heights of each node after adjustment.

[0031] Furthermore, the second measurement submodule includes:

[0032] The second measurement unit is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node.

[0033] The second calculation unit is used to calculate the geodetic height of the stable elevation starting point and the geodetic height of each node from the GNSS measurement data of the GNSS reference station and each node.

[0034] Accordingly, a third aspect of the present invention also provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to cause the at least one processor to perform the above-described dynamic measurement method for GNSS-based elevation control networks.

[0035] Furthermore, a fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the above-described dynamic measurement method for GNSS-based elevation control networks.

[0036] The above-described technical solutions of the embodiments of the present invention have the following beneficial technical effects:

[0037] By utilizing GNSS technology to achieve high-precision dynamic maintenance of the elevation control network, this method overcomes the inherent drawbacks of existing technologies that use leveling surveys for elevation control network maintenance, such as station-by-station transmission, large number of personnel, high economic costs, low efficiency, and long operation time. It reduces the maintenance cost and operation time of the elevation control network, improves operation efficiency, reduces the number of personnel, and enables the maintenance accuracy of the elevation control network to reach the same level as that of leveling network re-measurement. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the principle of leveling in existing technology;

[0039] Figure 2 This is a flowchart of the dynamic measurement method for elevation control network based on GNSS provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram illustrating the principle of the dynamic measurement method for elevation control network based on GNSS provided in this embodiment of the invention;

[0041] Figure 4This invention provides a dynamic measurement method for elevation control networks based on GNSS.

[0042] Figure 5 This is a block diagram of a GNSS-based dynamic measurement system for elevation control networks provided in an embodiment of the present invention.

[0043] Figure 6 This is a schematic diagram of the acquisition module provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the first measurement submodule provided in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the second measurement submodule provided in an embodiment of the present invention.

[0046] Figure label:

[0047] 1. Acquisition module; 11. First measurement submodule; 111. First measurement unit; 112. First calculation unit; 12. Second measurement submodule; 121. Second measurement unit; 122. Second calculation unit; 13. Calculation submodule; 2. Measurement module; 3. Calculation module. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0049] Figure 2 This is a flowchart of the dynamic measurement method for elevation control network based on GNSS provided in an embodiment of the present invention.

[0050] Figure 3 This is a schematic diagram illustrating the principle of the dynamic measurement method for elevation control network based on GNSS provided in an embodiment of the present invention.

[0051] Please refer to Figure 2 and Figure 3 The first aspect of this invention provides a dynamic measurement method for a GNSS-based elevation control network, comprising the following steps:

[0052] S100, during the resurvey of the elevation control network, obtains the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point.

[0053] S200 performs phased synchronous GNSS observations on the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node.

[0054] S300 calculates the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point, the elevation anomaly difference of each node, and the real-time geodetic height.

[0055] Specifically, in step S100, the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point is obtained, including:

[0056] S110 performs leveling network observations on the stable elevation starting point and each node to obtain the normal elevation after adjustment of each node.

[0057] S120 performs full-network GNSS observations of the stable elevation starting point and each node to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node.

[0058] S130 obtains the elevation anomaly difference of each node relative to the stable elevation starting point based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment.

[0059] Further, in step S110, leveling network observations are performed on the stable elevation starting point and each node to obtain the adjusted normal elevation of each node, including:

[0060] S111, starting from a stable elevation starting point, uses a leveling measurement mode to transfer elevation station by station, obtaining the elevation difference observation values ​​for each leveling section.

[0061] S112, perform leveling network adjustment calculations to obtain the normal heights of each node after adjustment.

[0062] Further, in step S120, the geodetic height of the stable elevation starting point and each node are obtained by performing full-network GNSS observations on the stable elevation starting point and each node, including:

[0063] S121 performs phased synchronous GNSS observations of the stable elevation starting point and each node.

[0064] S122 calculates the geodetic height of the stable elevation starting point and the geodetic height of each node using GNSS measurement data from the GNSS reference station and each node.

[0065] Figure 4 This is a schematic diagram of a dynamic measurement method for elevation control network based on GNSS provided in an embodiment of the present invention.

[0066] Please refer to Figure 4The diamond-shaped points are the starting points for stable elevation calculations, and the round points are the nodes of the elevation control network. Elevation control network resurvey involves measuring the real-time normal elevation of each node. Using GNSS measurement mode, only GNSS instruments need to be set up at the nodes to determine the real-time normal elevation of each node.

[0067] In the above technical solution, the basic principle of using GNSS technology for dynamic maintenance of the elevation control network is as follows:

[0068] Let P be a node in the elevation control network and Q be the starting point for stable elevation calculation. Then:

[0069] (1)

[0070] (2)

[0071] (3)

[0072] In the formula: For the earth to be high, Normally high. This is an elevation anomaly. Given the difference in ground elevation, combining equations (1)-(3) yields the normal elevation of node P at time t. for:

[0073] (4)

[0074] In the formula: The normal elevation of the starting point Q for stable elevation is a known fixed quantity that does not change over time; , These are the geodetic heights of the two points at time t, obtained by simultaneously performing GNSS measurements at the two points. , The elevation anomalies of the two points are shown. Since the difference in elevation anomalies generally changes by millimeters over time, it can be ignored. The difference in elevation anomalies between the two points is calculated using the normal height and geodetic height observed by the first-phase leveling network:

[0075] (5)

[0076] (6)

[0077] but:

[0078] (7)

[0079] In the formula: These are the observation times for the first phase of the leveling network; , They are respectively The geodetic heights at time node P and the starting point of stable elevation Q are obtained using GNSS measurements. for The normal elevation of node P at time point is obtained from observations of the first phase of the leveling network. The normal elevation of the starting point Q for stable elevation calculation.

[0080] By combining equations (4) and (7), the normal height of node P at time t can be determined. .

[0081] Based on the above calculation process, the steps of one embodiment of the GNSS-based dynamic measurement method for elevation control networks are as follows:

[0082] 1) During the first elevation control network observation, measurements were taken starting from the stable elevation reference point. The elevation was transferred station by station using a leveling survey mode to obtain the elevation difference observations for each leveling section. Leveling network adjustment calculations were then performed to obtain the normal elevations of each node in the elevation control network after adjustment. ( ), This represents the number of nodes.

[0083] 2) During the first elevation control network observation, GNSS instruments were set up at each node of the elevation control network to conduct phased synchronous GNSS observations with the stable elevation starting point. The number of synchronous observation points was determined based on the number of GNSS instruments. Data processing was performed on the combined GNSS measurement data from the high-precision GNSS reference station and the nodes to obtain the three-dimensional coordinates (latitude, longitude, and geodetic height) of the stable elevation starting point and each node of the elevation control network. The geodetic heights are as follows: and .

[0084] 3) Based on equation (7), using the geodetic height and normal height of the stable elevation starting point and the geodetic height and normal height of each node, the difference in geoid eclipse between each node and the stable elevation starting point is calculated. .

[0085] 4) During the second and subsequent elevation control network resurveys, leveling is not required. Only phased synchronous GNSS observations are needed at the stable elevation starting point and each node of the elevation control network, using the same method as step 2), to obtain the new three-dimensional coordinates (latitude, longitude, and geodetic height) of the stable elevation starting point and each node of the elevation control network. The geodetic heights are respectively... and .

[0086] 5) Based on equation (4), using the normal height and real-time geodetic height of the stable elevation starting point, the real-time geodetic height of each node, and the difference in elevation anomalies between each node and the stable elevation starting point obtained in step 3), the real-time normal height of each node in the elevation control network is calculated. .

[0087] For an elevation control network, the number of nodes can range from hundreds to tens of thousands. Maintaining the network dynamically using leveling is labor-intensive, costly, and time-consuming. However, by using the GNSS measurement method described above to dynamically maintain the normal height of each node, only the initial leveling observation is needed to obtain the normal height of each node, along with a GNSS measurement to obtain the geodetic height. Subsequent measurements do not require leveling observations; instead, a new GNSS measurement at each node is performed to obtain the real-time normal height of each node, thus achieving dynamic maintenance of the elevation control network.

[0088] For the resurvey of elevation control networks with the same number of points, the number of observers, operating costs, and time required by the GNSS measurement mode are significantly lower than those of the leveling measurement mode. Therefore, using the GNSS measurement mode for the resurvey of elevation control networks can significantly reduce the maintenance costs and operating time of the elevation control network, improve operating efficiency, reduce the number of operating personnel, and achieve the same level of accuracy as the leveling network resurvey.

[0089] The above-mentioned GNSS-based dynamic measurement method for elevation control networks uses GNSS measurement to dynamically maintain the normal elevation of each node in the elevation control network. During the remeasurement of the elevation control network, it is only necessary to perform phased synchronous GNSS observations at the stable elevation starting point and each node of the elevation control network. By combining the real-time geodetic height of each node obtained by GNSS measurement with the difference in geoid anomaly of each node relative to the elevation starting point, the real-time normal elevation of each node in the elevation control network can be obtained, thereby realizing the dynamic maintenance of the elevation control network.

[0090] Using GNSS technology for dynamic maintenance of elevation control networks eliminates the need for leveling measurements during subsequent resurveys, except for the initial leveling observation. Instead, phased synchronous GNSS observations are conducted at the stable elevation starting point and each node of the elevation control network. For resurveys of the same number of points, the GNSS measurement mode requires significantly fewer personnel, lower operational costs, and less time compared to the leveling mode. Therefore, using GNSS for elevation control network resurveys can substantially reduce maintenance costs and operational time, improve efficiency, reduce the number of personnel, and achieve the same accuracy level as leveling network resurveys.

[0091] Figure 5 This is a block diagram of a GNSS-based dynamic measurement system for elevation control networks provided in an embodiment of the present invention.

[0092] Accordingly, please refer to Figure 5A second aspect of this invention provides a GNSS-based dynamic measurement system for an elevation control network, comprising: an acquisition module 1, a measurement module 2, and a calculation module 3. The acquisition module 1 is used to acquire the elevation anomaly difference of each node of the elevation control network relative to a stable elevation starting point during elevation control network re-measurement. The measurement module 2 is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node. The calculation module 3 is used to calculate the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point, the elevation anomaly difference, and the real-time geodetic height of each node.

[0093] Figure 6 This is a schematic diagram of the acquisition module provided in an embodiment of the present invention.

[0094] Further, please refer to Figure 6 The acquisition module 1 includes: a first measurement submodule 11, a second measurement submodule 12, and a calculation submodule 13. The first measurement submodule 11 performs leveling network observations on the stable elevation starting point and each node to obtain the normal height of each node after adjustment. The second measurement submodule 12 performs full-network GNSS observations on the stable elevation starting point and each node to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node. The calculation submodule 13, based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment, calculates the elevation anomaly difference of each node relative to the stable elevation starting point.

[0095] Figure 7 This is a schematic diagram of the first measurement submodule provided in an embodiment of the present invention.

[0096] Further, please refer to Figure 7 The first measurement submodule 11 includes a first measurement unit 111 and a first calculation unit 112. The first measurement unit 111 is used to measure from the stable elevation starting point, and to transfer the elevation station by station using the leveling measurement mode to obtain the elevation difference observation value of each leveling section; the first calculation unit 112 is used to perform leveling network adjustment calculation to obtain the normal height of each node after adjustment.

[0097] Figure 8 This is a schematic diagram of the second measurement submodule provided in an embodiment of the present invention.

[0098] Further, please refer to Figure 8The second measurement submodule 12 includes a second measurement unit 121 and a second calculation unit 122. The second measurement unit 121 is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node; the second calculation unit 122 is used to calculate the geodetic height of the stable elevation starting point and the geodetic height of each node from the GNSS measurement data of the GNSS reference station and each node.

[0099] The aforementioned GNSS-based dynamic measurement system for elevation control networks utilizes GNSS technology to achieve high-precision dynamic maintenance of the elevation control network. This addresses the inherent shortcomings of existing technologies that use leveling surveys for elevation control network maintenance, such as station-by-station transmission, large number of personnel, high economic costs, low operational efficiency, and long operation time. It reduces the maintenance cost and operation time of the elevation control network, improves operational efficiency, reduces the number of personnel, and enables the maintenance accuracy of the elevation control network to reach the same level as that of leveling network re-measurement.

[0100] Accordingly, a third aspect of the present invention also provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to cause the at least one processor to perform the above-described dynamic measurement method for GNSS-based elevation control networks.

[0101] Furthermore, a fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the above-described dynamic measurement method for GNSS-based elevation control networks.

[0102] This invention aims to protect a GNSS-based dynamic measurement method and system for elevation control networks. The method includes: during elevation control network re-measurement, obtaining the geoid differences between each node of the elevation control network and the stable elevation starting point; performing phased synchronous GNSS observations on the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node; and calculating the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point, and the geoid differences and real-time geodetic heights of each node. The above technical solution has the following advantages:

[0103] By utilizing GNSS technology to achieve high-precision dynamic maintenance of the elevation control network, this method overcomes the inherent drawbacks of existing technologies that use leveling surveys for elevation control network maintenance, such as station-by-station transmission, large number of personnel, high economic costs, low efficiency, and long operation time. It reduces the maintenance cost and operation time of the elevation control network, improves operation efficiency, reduces the number of personnel, and enables the maintenance accuracy of the elevation control network to reach the same level as that of leveling network re-measurement.

[0104] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0106] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0107] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A dynamic measurement method for elevation control networks based on GNSS, characterized in that, Includes the following steps: During the resurvey of the elevation control network, the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point is obtained. The stable elevation starting point and each node are subjected to phased synchronous GNSS observations to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node; Based on the normal elevation and real-time geodetic elevation of the stable elevation starting point, and the elevation anomaly difference and real-time geodetic elevation of each node, the real-time normal elevation of each node is calculated. The acquisition of the elevation anomaly difference between each node of the elevation control network and the stable elevation starting point includes: Leveling network observations were performed on the stable elevation starting point and each node to obtain the normal elevation of each node after adjustment. The stable elevation starting point and each node are observed by a full network of GNSS to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node; Based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment, the elevation anomaly difference of each node relative to the stable elevation starting point is obtained.

2. The dynamic measurement method for GNSS-based elevation control network according to claim 1, characterized in that, The process of obtaining the normal height of each node after adjustment by leveling network observation of the stable elevation starting point and each node includes: Starting from the stable elevation reference point, the elevation is transferred station by station using the leveling measurement mode to obtain the elevation difference observation value of each leveling section; Perform leveling network adjustment calculations to obtain the normal heights of each node after adjustment.

3. The dynamic measurement method for GNSS-based elevation control network according to claim 1, characterized in that, The process of obtaining the geodetic height of the stable elevation starting point and the geodetic height of each node through full-network GNSS observation of the stable elevation starting point and each node includes: The stable elevation starting point and each node are subjected to phased synchronous GNSS observations. The geodetic height of the stable elevation starting point and the geodetic height of each node are calculated from the GNSS measurement data of the GNSS reference station and each node.

4. A dynamic measurement system for elevation control networks based on GNSS, characterized in that, include: The acquisition module is used to acquire the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point during the resurvey of the elevation control network. The measurement module is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node. The calculation module is used to calculate the real-time normal height of each node based on the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node; the acquisition module includes: The first measurement submodule is used to perform leveling network observations on the stable elevation starting point and each node to obtain the normal height of each node after adjustment. The second measurement submodule is used to perform full-network GNSS observations on the stable elevation starting point and each node to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node; The calculation submodule is used to obtain the elevation anomaly difference of each node relative to the stable elevation starting point based on the geodetic height of the stable elevation starting point and the normal height and geodetic height of each node after adjustment.

5. The GNSS-based dynamic measurement system for elevation control networks according to claim 4, characterized in that, The first measurement submodule includes: The first measurement unit is used to start from the stable elevation starting point, and to transfer the elevation station by station using the leveling measurement mode to obtain the elevation difference observation value of each leveling section. The first calculation unit is used to perform leveling network adjustment calculations to obtain the normal heights of each node after adjustment.

6. The GNSS-based dynamic measurement system for elevation control networks according to claim 4, characterized in that, The second measurement submodule includes: The second measurement unit is used to perform phased synchronous GNSS observations of the stable elevation starting point and each node. The second calculation unit is used to calculate the geodetic height of the stable elevation starting point and the geodetic height of each node from the GNSS measurement data of the GNSS reference station and each node.

7. An electronic device, characterized in that, include: At least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the processor, the instructions being executed by the processor to cause the at least one processor to perform the GNSS-based dynamic measurement method for elevation control networks as described in any one of claims 1-3.

8. A computer-readable storage medium, characterized in that, It stores computer instructions, which, when executed by a processor, implement the dynamic measurement method for GNSS-based elevation control networks as described in any one of claims 1-3.

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