Regional three-dimensional atmosphere profile acquisition method and device
Multi-azimuth and multi-elevation angle observations are performed through a single-based microwave radiometer, combined with the observation path distance mid-point mapping method, the three-dimensional atmospheric profiles of the foundation microwave radiometer station and surrounding areas are obtained, solving the problems of high cost and complex equipment networking in the existing technology, and achieving low-cost and efficient three-dimensional atmospheric profile observations.
Patent Information
- Application Number
- CN202411890523.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-03-14
AI Technical Summary
In the prior art, when the foundation microwave radiometer is used to obtain the three-dimensional atmospheric profile of the region, it is costly and requires multiple equipment networks to be used for observation.
The observation of multi-azimuth angles and multi-elevation angles is carried out through a single foundation microwave radiometer, and the atmospheric profiles of observation paths with different azimuth angles and different elevation angles are obtained, and the three-dimensional atmospheric profiles of the foundation microwave radiometer station and surrounding areas are calculated using the mid-point mapping method of the observation path distance.
The function of a single-based microwave radiometer to obtain the three-dimensional atmospheric profile in the area is realized, which reduces the hardware cost and avoids the complexity of networking of multiple devices. It has the advantages of low cost, easy to implement, convenient and practical.
Smart Images
Figure CN119620236A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of meteorological monitoring technology, and in particular to a method and device for acquiring a regional three-dimensional atmospheric profile. Background Art
[0002] Atmospheric microwave radiation energy is closely related to the characteristics of atmospheric absorption spectrum. The absorption spectra of different atmospheric components at different altitudes are different. Among them, the water vapor absorption spectrum is closely related to atmospheric humidity, while the oxygen absorption spectrum is closely related to atmospheric temperature. In addition, the weighting functions of different frequencies are also different. Therefore, the microwave frequency band can be used to detect atmospheric radiation energy, obtain atmospheric absorption spectrum information, and then invert atmospheric parameter profiles such as atmospheric temperature and humidity. Ground-based microwave radiometers can detect atmospheric radiation energy in the 22-30GHz and 51-59GHz frequency bands, and calculate the atmospheric radiation brightness temperature value through the Planck radiation equation. Since these brightness temperature values are related to the radiation of atmospheric water vapor, oxygen molecules and cloud liquid water, the obtained brightness temperature values can be used to invert the atmospheric temperature, humidity, water vapor density and cloud liquid water profile. These atmospheric profiles inverted by ground-based microwave radiometers can reach the minute level in terms of time resolution, which can make up for the lack of coarse time resolution of conventional meteorological soundings. They have the ability to capture the fine thermal structure of small and medium-scale weather systems, so they are gradually widely used in disaster weather monitoring, early warning, forecasting and cloud physics research.
[0003] At present, ground-based microwave radiometers mostly use the zenith observation mode to remotely sense the single-point atmospheric profile at the location of the equipment. This observation mode can only remotely sense the single-point atmospheric profile at the location of the equipment, and cannot obtain the three-dimensional atmospheric profile of the area where the equipment is located. In order to obtain the three-dimensional atmospheric profile of the region, a multi-station ground-based microwave radiometer network observation method is usually adopted, and multiple ground-based microwave radiometers are deployed to form an observation network to realize the observation of the three-dimensional atmospheric profile of the region.
[0004] The method of networking multiple ground-based microwave radiometers to remotely sense the three-dimensional atmospheric profile of a region is costly. Summary of the invention
[0005] In view of this, it is necessary to provide a method and device for obtaining a regional three-dimensional atmospheric profile to solve the problem of high cost in the prior art.
[0006] In order to solve the above problems, the present application provides a method for obtaining a regional three-dimensional atmospheric profile, comprising: Obtain the atmospheric microwave radiation energy values of a single ground-based microwave radiometer at different azimuths and elevations; Based on the atmospheric microwave radiation energy values at different azimuths and elevations, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated; According to the observation path distance midpoint mapping method, the three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surrounding area is obtained based on the atmospheric profile of the observation path.
[0007] In some possible implementations, the single ground-based microwave radiometer is equipped with an azimuth positioner base, and the azimuth positioner is used to control the azimuth of the antenna scanning surface of the single ground-based microwave radiometer.
[0008] In some possible implementations, calculating the atmospheric profiles of the observation paths at different azimuths and elevations based on the atmospheric microwave radiation energy values at different azimuths and elevations includes: According to Planck's radiation law, the atmospheric radiation brightness temperature value of the corresponding microwave channel is calculated based on the atmospheric microwave radiation energy values at different azimuths and elevations; According to the pre-constructed neural network inversion model, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated based on the atmospheric radiation brightness temperature values.
[0009] In some possible implementations, according to the observation path distance midpoint mapping method, a three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surrounding area is obtained based on the atmospheric profile of the observation path, including: The atmospheric profile obtained by the specified elevation angle observation path in the atmospheric profile of the observation path is regarded as the atmospheric profile at the midpoint of the horizontal distance of the observation path, and the three-dimensional atmospheric profile of the single ground-based microwave radiometer site and its surrounding area is obtained.
[0010] In some possible implementations, the atmospheric microwave radiation energy values at different azimuths and elevations of the single ground-based microwave radiometer are collected by the following steps: The azimuth angle of the scanning surface of the antenna of a single ground-based microwave radiometer is controlled to change in the clockwise direction to perform multi-azimuth observations. During each azimuth observation, the elevation angle of the scanning observation of the antenna of a single ground-based microwave radiometer is controlled to change to perform multi-elevation observations.
[0011] In some possible implementations, the azimuth angle of the scanning plane of the antenna of a single ground-based microwave radiometer is controlled to change in a clockwise direction, including: setting the azimuth angle of the scanning plane of the antenna of the single microwave radiometer to 0°, 30°, 60°, 90°, 120°, and 150° in sequence for scanning observation.
[0012] In some possible implementations, the elevation angle change of a single ground-based microwave radiometer antenna scanning observation is controlled, including: setting the elevation angle of the single microwave radiometer antenna scanning observation to 15°, 30°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, and 165° in sequence for scanning observation.
[0013] In some possible implementations, the method further includes: after completing a clockwise all-round scanning observation, controlling the azimuth angle of the scanning surface of the single ground-based microwave radiometer antenna to be reset counterclockwise to the original azimuth.
[0014] The present application also provides a regional three-dimensional atmospheric profile acquisition device, comprising: An observation data acquisition unit is used to obtain the atmospheric microwave radiation energy values of a single ground-based microwave radiometer at different azimuths and elevations; A path atmospheric profile calculation unit, configured to calculate the atmospheric profiles of the observation paths at different azimuths and elevations based on the atmospheric microwave radiation energy values at different azimuths and elevations; The regional atmospheric profile acquisition unit is used to obtain the regional three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surroundings based on the atmospheric profile of the observation path according to the observation path distance midpoint mapping method.
[0015] The beneficial effect of the present application is as follows: a method for acquiring a regional three-dimensional atmospheric profile provided by the present application obtains the atmospheric profiles of observation paths with different azimuths and elevations by introducing observation methods with multiple azimuths and multiple elevations, and obtains the regional three-dimensional atmospheric profiles of the ground-based microwave radiometer site and its surroundings by adopting the observation path distance midpoint mapping method. Thus, there is no need to construct an observation network of multiple ground-based microwave radiometers. Only a single ground-based microwave radiometer is needed to realize the observation of the regional three-dimensional atmospheric profiles of the ground-based microwave radiometer site and its surroundings, which expands the observation function of a single ground-based microwave radiometer and significantly reduces the hardware cost of the three-dimensional atmospheric profiles of the remote sensing area by networking multiple ground-based microwave radiometers. The method has the advantages of low cost, easy implementation, convenience and practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of an embodiment of a method for obtaining a regional three-dimensional atmospheric profile provided by the present application; Figure 2 For this application Figure 1 A schematic flow chart of an embodiment of step S102; Figure 3 Schematic diagram of the observation path distance midpoint mapping method provided for this application; Figure 4 Schematic diagram of the horizontal distance position of the atmospheric profiles of the observation paths at different azimuths and elevations provided for this application relative to the ground-based microwave radiometer site; Figure 5 Schematic diagram of regional atmospheric temperature profile provided for this application; Figure 6 Schematic diagram of regional atmospheric water vapor density distribution provided for this application; Figure 7A schematic diagram of the structure of an embodiment of a regional three-dimensional atmospheric profile acquisition device provided in the present application. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0018] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts may be implemented out of order, and steps without logical contextual relationships may be reversed in order or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowcharts, or may remove one or more operations from the flowcharts, under the guidance of the content of this application. Some of the block diagrams shown in the accompanying drawings are functional entities, and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor systems and / or microcontroller systems.
[0019] The descriptions of "first", "second", etc. involved in the embodiments of the present application are only used to describe the implicit purpose, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" and "second" may explicitly or implicitly include at least one of the features. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example: A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone.
[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0021] The present application provides a method for obtaining a regional three-dimensional atmospheric profile, which is described below.
[0022] Figure 1A schematic diagram of an embodiment of a method for obtaining a regional three-dimensional atmospheric profile provided in this application is shown in FIG. Figure 1 As shown, a method for obtaining a regional three-dimensional atmospheric profile includes: S101, obtaining atmospheric microwave radiation energy values at different azimuths and elevations of a single ground-based microwave radiometer; S102, calculating atmospheric profiles of observation paths at different azimuths and elevations based on atmospheric microwave radiation energy values at different azimuths and elevations; S103. According to the observation path distance midpoint mapping method, the three-dimensional atmospheric profile of the single ground-based microwave radiometer site and its surrounding area is obtained based on the atmospheric profile of the observation path.
[0023] Compared with the prior art, the present application introduces multi-azimuth and multi-elevation observation methods to obtain the atmospheric profiles of observation paths at different azimuths and elevations, and adopts the observation path distance midpoint mapping method to obtain the regional three-dimensional atmospheric profiles of the ground-based microwave radiometer site and its surroundings. Therefore, there is no need to build an observation network of multiple ground-based microwave radiometers. Only a single ground-based microwave radiometer is needed to realize the observation of the regional three-dimensional atmospheric profiles of the ground-based microwave radiometer site and its surroundings, which expands the observation function of a single ground-based microwave radiometer and significantly reduces the hardware cost of the three-dimensional atmospheric profile of the remote sensing area by networking multiple ground-based microwave radiometers. It has the advantages of low cost, easy implementation, convenience and practicality.
[0024] In order to more conveniently perform multi-azimuth observations, in some embodiments, a single ground-based microwave radiometer is equipped with an azimuth locator base, and the azimuth locator is used to control the azimuth of the antenna scanning surface of the single ground-based microwave radiometer, thereby performing multi-azimuth observations on the single ground-based microwave radiometer.
[0025] Furthermore, in order to better perform multi-azimuth and multi-elevation observations, in some embodiments, the atmospheric microwave radiation energy values of a single ground-based microwave radiometer at different azimuths and elevations are collected through the following steps: the azimuth angle of the antenna scanning surface of the single ground-based microwave radiometer is controlled to change clockwise for multi-azimuth observations, and at each azimuth observation, the elevation angle of the antenna scanning observation of the single ground-based microwave radiometer is controlled to change for multi-elevation observations, thereby achieving clockwise all-round scanning observations.
[0026] In a specific embodiment, in the observation program of a single ground-based microwave radiometer, the azimuth angle of the antenna scanning plane is set to 0° (due north), 30° (clockwise), 60°, 90° (due east), 120°, and 150° for scanning observation. In addition, at each azimuth angle observation, the elevation angle of the antenna scanning observation is set to 15°, 30°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, and 165° for scanning observation, thereby realizing clockwise all-round scanning observation.
[0027] In order to better calculate the atmospheric profiles of observation paths at different azimuths and elevations, in some embodiments, as Figure 2 As shown, step S102 specifically includes: S201. According to Planck's radiation law, based on the atmospheric microwave radiation energy values at different azimuths and elevations, the atmospheric radiation brightness temperature value of the corresponding microwave channel is calculated; S202. According to a pre-built neural network inversion model, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated based on the atmospheric radiation brightness temperature value.
[0028] In a specific embodiment, Figure 3 As shown in FIG. 1 , the observation path distance midpoint mapping method specifically regards the atmospheric profile obtained by the specified elevation angle observation path in the atmospheric profile of the observation path as the atmospheric profile at the midpoint of the horizontal distance of the observation path. Based on this, based on the above-mentioned azimuth and elevation angle settings of the antenna observation, the atmospheric profile at an altitude of 0-10 km on the observation path, and the calculated values in Table 1, the following can be obtained: Figure 4 The horizontal distance positions of the atmospheric profiles at different azimuths and elevations relative to the ground-based microwave radiometer stations are shown in the figure. Therefore, a set of regional three-dimensional atmospheric profiles of ground-based microwave radiometer stations and their surroundings can be obtained by a clockwise full-scale scanning observation. The final schematic diagram of the regional atmospheric temperature profile is shown in the figure below. Figure 5 The schematic diagram of regional atmospheric water vapor density distribution is shown in Figure 6 As shown, the results show the feasibility of the method of remote sensing regional three-dimensional atmospheric profile using a single ground-based microwave radiometer in this application, which can significantly reduce the hardware cost of the current remote sensing regional three-dimensional atmospheric profile based on multiple ground-based microwave radiometers. Table 1 is as follows: Table 1: Horizontal distance of observation path and midpoint distance of atmospheric profiles at different elevation angles
[0029] To prevent the external wires of the ground-based microwave radiometer from being entangled in the equipment, in some embodiments, after completing a clockwise all-round scanning observation, the azimuth of the antenna scanning surface of a single ground-based microwave radiometer is controlled to be reset counterclockwise to the original azimuth. In a specific embodiment, in the ground-based microwave radiometer observation program, the azimuth of the antenna scanning surface is reset counterclockwise from 150° to the original azimuth 0° (due north).
[0030] In order to better implement a method for obtaining a regional three-dimensional atmospheric profile in an embodiment of the present application, based on a method for obtaining a regional three-dimensional atmospheric profile, correspondingly, Figure 7 As shown, the embodiment of the present application further provides a regional three-dimensional atmospheric profile acquisition device 700, comprising: The observation data acquisition unit 701 is used to obtain the atmospheric microwave radiation energy values at different azimuth angles and elevation angles of a single ground-based microwave radiometer; A path atmospheric profile calculation unit 702 is used to calculate the atmospheric profiles of the observation paths at different azimuths and elevations based on the atmospheric microwave radiation energy values at different azimuths and elevations; The regional atmospheric profile acquisition unit 703 is used to obtain the regional three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surroundings based on the atmospheric profile of the observation path according to the observation path distance midpoint mapping method.
[0031] The regional three-dimensional atmospheric profile acquisition device 700 provided in the above embodiment can implement the technical solution described in the above embodiment of a regional three-dimensional atmospheric profile acquisition method. The specific implementation principles of the above units can refer to the corresponding contents in the above embodiment of a regional three-dimensional atmospheric profile acquisition method, which will not be repeated here.
[0032] The above is a detailed introduction to a method for acquiring a regional three-dimensional atmospheric profile provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
[0033] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.
Claims
1. A method for obtaining a regional three-dimensional atmospheric profile, characterized in that: include: Obtain the atmospheric microwave radiation energy values of a single ground-based microwave radiometer at different azimuths and elevations; Based on the atmospheric microwave radiation energy values at different azimuths and elevations, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated; According to the observation path distance midpoint mapping method, the three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surrounding area is obtained based on the atmospheric profile of the observation path.
2. A method for acquiring a regional three-dimensional atmospheric profile according to claim 1, characterized in that: The single ground-based microwave radiometer is equipped with an azimuth locator base, and the azimuth locator is used to control the azimuth of the antenna scanning surface of the single ground-based microwave radiometer.
3. A method for acquiring a regional three-dimensional atmospheric profile according to claim 1, characterized in that: Based on the atmospheric microwave radiation energy values at different azimuths and elevations, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated, including: According to Planck's radiation law, the atmospheric radiation brightness temperature value of the corresponding microwave channel is calculated based on the atmospheric microwave radiation energy values at different azimuths and elevations; According to the pre-constructed neural network inversion model, the atmospheric profiles of the observation paths at different azimuths and elevations are calculated based on the atmospheric radiation brightness temperature values.
4. A method for acquiring a regional three-dimensional atmospheric profile according to claim 1, characterized in that: According to the observation path distance midpoint mapping method, the three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surrounding area is obtained based on the atmospheric profile of the observation path, including: The atmospheric profile obtained by the specified elevation angle observation path in the atmospheric profile of the observation path is regarded as the atmospheric profile at the midpoint of the horizontal distance of the observation path, and the three-dimensional atmospheric profile of the single ground-based microwave radiometer site and its surrounding area is obtained.
5. A method for acquiring regional three-dimensional atmospheric profiles according to claim 1, characterized in that: The atmospheric microwave radiation energy values at different azimuths and elevations of the single ground-based microwave radiometer are collected by the following steps: The azimuth angle of the scanning surface of the antenna of a single ground-based microwave radiometer is controlled to change in the clockwise direction to perform multi-azimuth observations. During each azimuth observation, the elevation angle of the scanning observation of the antenna of a single ground-based microwave radiometer is controlled to change to perform multi-elevation observations.
6. A method for acquiring a regional three-dimensional atmospheric profile according to claim 5, characterized in that: The azimuth angle of the scanning surface of the antenna of a single ground-based microwave radiometer is controlled to change in a clockwise direction, including: setting the azimuth angle of the scanning surface of the antenna of the single microwave radiometer to 0°, 30°, 60°, 90°, 120°, and 150° in sequence for scanning observation.
7. A method for acquiring a regional three-dimensional atmospheric profile according to claim 5, characterized in that: Control the change of the elevation angle of a single ground-based microwave radiometer antenna scanning observation, including: setting the elevation angle of a single microwave radiometer antenna scanning observation to 15°, 30°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, and 165° in sequence for scanning observation.
8. A method for acquiring a regional three-dimensional atmospheric profile according to claim 5, characterized in that: The method further comprises: after completing a clockwise all-round scanning observation, controlling the azimuth angle of the scanning surface of the antenna of the single ground-based microwave radiometer to be reset counterclockwise to the original azimuth.
9. A device for acquiring regional three-dimensional atmospheric profiles, characterized in that: include: An observation data acquisition unit is used to obtain the atmospheric microwave radiation energy values of a single ground-based microwave radiometer at different azimuths and elevations; A path atmospheric profile calculation unit, configured to calculate the atmospheric profiles of the observation paths at different azimuths and elevations based on the atmospheric microwave radiation energy values at different azimuths and elevations; The regional atmospheric profile acquisition unit is used to obtain the regional three-dimensional atmospheric profile of a single ground-based microwave radiometer site and its surroundings based on the atmospheric profile of the observation path according to the observation path distance midpoint mapping method.