A method for constructing a meteorological system body coordinate system and a computer-readable medium

Abstract

The present invention discloses a method for constructing a body-attached coordinate system for a meteorological system and a computer-readable medium. The method includes obtaining a GIS map and wind field data to be analyzed, as well as other meteorological element data; determining the meteorological system to be analyzed based on the streamline field morphology of the wind field data, using other meteorological elements as auxiliary judgment basis, and determining the origin, range line, and two principal coordinate axes of the body-attached coordinate system of the meteorological system to be analyzed, and obtaining the longitude and latitude of the intersection of the two orthogonal principal coordinate axes and the range line of the meteorological system to be analyzed; selecting the data grid point spacing on the two orthogonal principal coordinate axes, and then automatically calculating and determining the number of data grid points and the grid point spacing on the two orthogonal principal coordinate axes; in the vertical direction, several standard levels can be selected as needed to establish a body-attached coordinate system grid, and thus a three-dimensional body-attached coordinate system framework for the meteorological system to be analyzed is constructed. The present invention creates another effective basic tool for the application of professional theories in the actual state of meteorological systems.

Description

Technical Field

[0001] The present invention relates to the technical field of weather map product analysis and processing, including reanalysis data fields, numerical simulation product output data fields, and instrument and equipment monitoring data fields, and specifically to a method for constructing a meteorological system body coordinate system and a computer-readable medium. Background Art

[0002] The occurrence and development of weather phenomena are often caused by various meteorological systems. In routine weather forecasting practice and in the teaching of meteorological dynamics, it is necessary to explore and analyze the structural characteristics, element distribution, and motion evolution of various meteorological systems. However, the rectangular grid of longitude and latitude currently used is a field based on the Euler perspective, describing the characteristics of each spatial point within the overall wind flow field of a region at a given moment. This means that wind flow is studied using the regional wind field as the descriptor. These spatial points are often longitude and latitude grid points, which remain fixed regardless of time. This is very convenient for describing the spatial distribution of the overall field elements. However, this is a regional or hemispheric field, encompassing both meteorological systems and the background circulation field. The Lagrangian perspective, on the other hand, tracks the movement of individual meteorological systems within the background flow field. In this case, the position and shape of meteorological systems are not fixed over time, especially since the systems are limited in scope and occupy a portion of the background wind flow field. Tracking meteorological systems requires continuous identification and location. Because meteorological systems directly influence the local weather they control, tracking them is crucial. Therefore, it's crucial to compare the descriptive and analytical results provided by the two coordinate systems underlying the Euler and Lagrangian perspectives: the regional longitude and latitude coordinate system and the meteorological system's body coordinate system. Focusing on the meteorological systems that cause various weather phenomena is crucial. However, due to the cumbersome nature of extracting, tracking, locating, and displaying meteorological systems, the Lagrangian analysis method is not currently incorporated into routine weather forecasting. Summary of the Invention

[0003] The object of the present invention is to address the deficiencies in the prior art and to provide a method for constructing a body-attached coordinate system for a meteorological system and a computer-readable medium.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a method for constructing a body-attached coordinate system of a meteorological system, comprising:

[0005] Obtain the GIS map and wind field data to be analyzed, as well as other required corresponding meteorological element field data;

[0006] Determine the meteorological system to be analyzed based on the streamline field shape of the wind field data, determine the origin and range line of the body coordinate system of the meteorological system to be analyzed, and determine the first principal coordinate axis of the body coordinate system of the meteorological system to be analyzed according to the key element characteristics of each meteorological element of the meteorological system to be analyzed input;

[0007] Obtaining the longitude and latitude of a key point based on the regional physical quantity distribution characteristics of other meteorological elements, and drawing a perpendicular orthogonal line through the key point to the first principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed to obtain a second orthogonal principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed, thereby forming two orthogonal principal coordinate axes of the satellite coordinate system of the meteorological system to be analyzed, and obtaining the longitude and latitude of an intersection of the two orthogonal principal coordinate axes and the range line of the meteorological system to be analyzed;

[0008] According to the needs of the user and the optional menu, the data grid point spacing on the two orthogonal principal coordinate axes of the coordinate system of the meteorological system to be analyzed is selected, and then the number of data grid points on the two orthogonal principal coordinate axes is calculated and determined based on the multivariate equation system;

[0009] The required standard level is selected in the vertical direction to establish a three-dimensional space grid of the body-attached coordinate system, thereby constructing a three-dimensional body-attached coordinate system framework for the meteorological system to be analyzed.

[0010] Furthermore, the wind field data includes various numerical model output product fields or various reanalysis data product fields or meteorological product display fields of monitoring data.

[0011] Furthermore, an electronic drawing board is used to obtain the GIS map and wind field data to be analyzed, as well as the required corresponding various meteorological element field data, and an electromagnetic pen is used to perform corresponding operations.

[0012] Furthermore, the key element features of the meteorological system to be analyzed include the strong wind speed axis, the heavy rainfall center, the wind direction shear or the speed mutation point / line.

[0013] Furthermore, the key element characteristics are obtained through equation calculation and automatically displayed, or manually determined based on the user's business experience and professional judgment of the actual situation.

[0014] Furthermore, the other meteorological elements include air pressure, temperature, precipitation, specific humidity, vertical velocity or satellite inversion parameters.

[0015] In a second aspect, the present invention provides a computer-readable medium for storing a computer program, which implements the above method when executed by a processor.

[0016] Beneficial effects: The present invention inputs GIS maps and wind field data, as well as other required corresponding meteorological elements into an electronic drawing board, and uses the electronic drawing board to draw and confirm the system core and scope, thereby determining the first principal coordinate axis of the meteorological system body coordinate system; by using the core point of the key element of the meteorological system, the second orthogonal principal coordinate axis of the body coordinate system is determined, and the key points and axis longitude and latitude values ​​such as the intersection of the two coordinate principal coordinate axes and the system scope line are extracted; by considering the offset and deformation of the meteorological system at different levels, based on the bottom coordinate axis, the two orthogonal principal coordinate axes of the high-level body coordinate system in the meteorological system are established, and a three-dimensional corresponding form of the body coordinate system of the same meteorological system is made. , the overall framework of the meteorological system's body coordinate system is obtained, and the conversion from the input rectangular longitude and latitude grid to the body coordinate system grid limited to the individual meteorological system is completed; the present invention does not intervene in the original operating system and does not change the user's habit of the original operating system. At the same time, it adds the establishment of a tracking coordinate system for the meteorological system relative to the environmental background activities, adds an observation platform for the dynamic structure characteristics of the meteorological system, and adds a convenient way to compare the distribution of meteorological system body elements with the distribution of conventional longitude and latitude grid space elements, providing users with a specific space for intuitively understanding the dynamic mechanism of the meteorological system, creating another effective basic tool for the application of professional theories in the actual state of the meteorological system. It also gives full play to the subjective initiative of users and solves the problem of convenient judgment and tracking of meteorological systems. In this process, human-computer interaction is integrated, and the user's professional ability is maintained to guide the computing tools, further providing users with an environment that displays their individual characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a flow chart of a method for constructing a body-attached coordinate system for a meteorological system according to an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of a meteorological system body coordinate system constructed by the method of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific examples. These examples are implemented based on the technical solution of the present invention, and it should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0020] like Figure 1As shown, an embodiment of the present invention provides a method for constructing a body-dependent coordinate system for a meteorological system, including obtaining a GIS map and wind field data to be analyzed, as well as other required meteorological element field data. Specifically, the meteorological element field data includes various numerical model output product fields, various reanalysis data product fields, or meteorological product display fields for monitoring data. These fields are based on a GIS base map, and the longitude and latitude of each point can be extracted. Other meteorological elements include air pressure, temperature, precipitation, specific humidity, vertical velocity, or satellite inversion parameters. An electronic drawing tablet can be used to obtain the GIS map and wind field data to be analyzed, as well as other meteorological element field data, and an electromagnetic pen can be used to perform subsequent operations. By inputting the wind field data and other meteorological element field data from the GIS map and longitude and latitude grid into the electronic drawing tablet, the existing operating system is not affected and the user's existing operating system habits are not changed. Based on the wind field morphology input on the electronic drawing tablet, key meteorological systems of interest are discovered and selected, such as cyclones, anticyclones, shear lines, saddle fields, asymptotic convergence lines, and so on, of various scales. Since the electronic drawing board is portable, it can be used as the display board for calculation and operation drawing of the present invention, and can be easily compared with the existing forecast operating system product display in various forms.

[0021] Based on the flow pattern of the wind field, a meteorological system is selected, such as an asymptotic frontogenic convergence line system. The origin and range of the body coordinate system of the meteorological system to be analyzed are determined. The center of this system is considered to be on the wind speed maximum value line, and the range considers the system coverage area and the area of ​​research focus. The first principal coordinate axis of the body coordinate system of the meteorological system to be analyzed is determined based on the key element characteristics of the meteorological system to be analyzed (such as the main line of the wind field convergence line). The key element characteristics of the meteorological system to be analyzed include the strong wind speed axis, the center of heavy rainfall, the wind direction shear, or the wind speed mutation point / line. Based on these key element characteristics, the principal coordinate axis of the body coordinate system of the meteorological system to be analyzed can be determined. These key element characteristics can be objectively and automatically displayed through equation calculation, such as the strong wind speed axis, or they can be manually determined by the user based on professional experience according to actual conditions, such as using an electromagnetic pen to select and choose the origin or principal coordinate axis of the meteorological system to be analyzed based on the spatial distribution characteristics of the key elements. At this point, relying on the GIS basemap, the first principal axis of the satellite coordinate system, which passes through the core of the meteorological system to be analyzed, or the coordinate origin, determined by objective or manual methods, can be automatically read. The longitude and latitude coordinates of the intersection of this principal axis and the system's range line are then obtained. This is used to subsequently calculate the grid position of the feature on the principal axis in the coordinate system.

[0022] The longitude and latitude of the key point are obtained based on the regional physical quantity distribution characteristics of other meteorological elements. A perpendicular orthogonal line is drawn through the key point to the first principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed to obtain the second orthogonal principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed. This constitutes the two orthogonal principal coordinate axes of the satellite coordinate system of the meteorological system to be analyzed, and the longitude and latitude of the intersection of the two orthogonal principal coordinate axes and the range line of the meteorological system to be analyzed are obtained. In other words, the position and size of the two orthogonal principal coordinate axes of the satellite coordinate system of the meteorological system to be analyzed, namely, the longitude and latitude of each end point of the two orthogonal principal coordinate axes, are determined. Different meteorological systems have different important meteorological elements. When obtaining the longitude and latitude of the key point, it is sufficient to select a key element from the other meteorological elements previously input, such as the center point of the maximum vertical ascent velocity or the precipitation center as the key point.

[0023] Select the data grid spacing along the two orthogonal principal axes of the meteorological system's body coordinate system from the selection menu as needed. Then, based on the multivariate equation system, calculate and determine the number of data grid points along the two orthogonal principal axes. Since these data grid points are not located on the longitude and latitude lines of the input meteorological element field's regional longitude and latitude grid, interpolation is required. The longitude and latitude coordinates of the grid points on the input element field's longitude and latitude grid (the grid size is determined by the input element field and is not limited to a fixed value) are interpolated onto the grid points along the two orthogonal principal axes of the meteorological system's body coordinate system. This assigns specific longitude and latitude coordinates to each grid point along the two orthogonal principal axes of the meteorological system's body coordinate system, completing the conversion from the input regional rectangular longitude and latitude grid to the meteorological system's body coordinate system grid.

[0024] Select the desired vertical level and establish a three-dimensional spatial grid of body-based coordinate systems at each selected vertical level using the same method as described above. This completes the three-dimensional body-based coordinate system framework for the meteorological system to be analyzed. This establishes three-dimensional body-based coordinate systems for meteorological systems of different scales, providing a framework for extracting meteorological systems from their background circulation for exploring their structural characteristics, element distribution, and motion evolution.

[0025] The form of the drawn body coordinate system can be found in Figure 2 , Figure 2The solid black lines in the figure represent the two orthogonal principal axes of the body coordinate system for a meteorological system (an asymptotic frontogenic convergence system). The black dots on the solid black lines are data points on these two orthogonal principal axes (their positions are interpolated from the latitude and longitude grid of the regional data field). The arrows represent the wind vectors for this asymptotic frontogenic convergence line (small wind speed vectors are not plotted). The darker areas and dashed lines represent wind speeds in m / s. The gray square on one of the orthogonal principal axes represents the center of the heavy precipitation area. Clearly, the principal axes of the body coordinate system intersect significantly with the longitude and latitude lines of the regional latitude and longitude grid of the input feature field (the vertical and horizontal coordinates along the edge of the figure). Thus, the two coordinate systems provide distinct coordinate spaces.

[0026] It should also be noted that if this solution is implemented directly on the original operating system, using a multi-window display and comparison, it is also possible to replace the electronic drawing tablet and electromagnetic pen method used in this solution. Alternatively, using another computer instead of an electronic drawing tablet and electromagnetic pen is also possible. However, using an electronic drawing tablet is more convenient and allows for flexible comparison and reference between the generated satellite coordinate system and the regional longitude and latitude coordinate system in the operating system, as well as the meteorological element distribution fields displayed by each.

[0027] Based on the above embodiments, those skilled in the art can easily understand that the present invention further provides a computer-readable medium for storing a computer program, which implements the above method when executed by a processor.

[0028] The above description is merely a preferred embodiment of the present invention. It should be noted that any other aspects not specifically described are considered prior art or common knowledge to those skilled in the art. Improvements and modifications may be made without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A method for constructing a body-attached coordinate system of a meteorological system, characterized in that: include: Obtain the GIS map and wind field data to be analyzed, as well as other required corresponding meteorological element field data; Determine the meteorological system to be analyzed based on the streamline field shape of the wind field data, determine the origin and range line of the body coordinate system of the meteorological system to be analyzed, and determine the first principal coordinate axis of the body coordinate system of the meteorological system to be analyzed according to the key element characteristics of each meteorological element of the meteorological system to be analyzed input; Obtaining the longitude and latitude of a key point based on the regional physical quantity distribution characteristics of other meteorological elements, and drawing a perpendicular orthogonal line through the key point to the first principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed to obtain a second orthogonal principal coordinate axis of the satellite coordinate system of the meteorological system to be analyzed, thereby forming two orthogonal principal coordinate axes of the satellite coordinate system of the meteorological system to be analyzed, and obtaining the longitude and latitude of an intersection of the two orthogonal principal coordinate axes and the range line of the meteorological system to be analyzed; Select the data grid point spacing on the two orthogonal principal coordinate axes of the coordinate system of the meteorological system to be analyzed, and then calculate and determine the number of data grid points on the two orthogonal principal coordinate axes based on the multivariate equation system; The required standard level is selected in the vertical direction to establish a three-dimensional space grid of the body-attached coordinate system, thereby constructing a three-dimensional body-attached coordinate system framework for the meteorological system to be analyzed.

2. The method for constructing a meteorological system body coordinate system according to claim 1, characterized in that: The wind field data include various numerical model output product fields or various reanalysis data product fields or meteorological product display fields of monitoring data.

3. The method for constructing a meteorological system body-attached coordinate system according to claim 1, characterized in that: Use an electronic drawing board to obtain the GIS map and wind field data to be analyzed, as well as the corresponding various meteorological element field data required, and use an electromagnetic pen to perform corresponding operations.

4. The method for constructing a meteorological system body coordinate system according to claim 1, characterized in that: The key element features of the meteorological system to be analyzed include the strong wind speed axis, the heavy rainfall center, the wind direction shear or the speed mutation point / line.

5. The method for constructing a meteorological system body-attached coordinate system according to claim 1, characterized in that: The key element characteristics are obtained through equation calculation and automatically displayed, or manually determined based on the user's business experience and professional judgment of the actual situation.

6. The method for constructing a meteorological system body-attached coordinate system according to claim 1, characterized in that: The other meteorological elements include air pressure, temperature, precipitation, specific humidity, vertical velocity or satellite inversion parameters.

7. A computer-readable medium for storing a computer program, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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