Meteorological ocean information transmission method based on low-orbit satellite

Abstract

The invention discloses a meteorological ocean information transmission method based on a low-orbit satellite. The method comprises the following steps: establishing a bidirectional data link between a gateway station and a terminal through a low-orbit satellite communication system; collecting observation data of the monitoring equipment in real time, and transmitting the observation data back to the star network gateway station through the satellite internet; meteorological marine environment data, fusion products and marine monitoring data are stored by adopting a distributed architecture; generating a severe convection weather falling area forecast based on the numerical forecasting product; loading a large-data-volume product through a broadband communication link, and receiving real-time observation data through a narrowband communication link; dynamically selecting a broadband or narrowband communication link for data distribution according to weather conditions; and the terminal station decrypts and decompresses the received data, stores the data into the data management platform, and provides data service for the adjoint guarantee terminal through the service interface. According to the invention, the transmission efficiency and accuracy are improved, the cost is reduced, and the security is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of meteorological and oceanic information application technology, and particularly relates to a meteorological and oceanic information transmission method based on low-orbit satellites. BACKGROUND

[0002] Meteorological and oceanic service support capability is based on information and supported by high-speed and large-capacity communication. For many years, the meteorological and oceanic information service of users in remote ocean ships and remote information poor areas has been restricted by communication conditions. Ground wired communication and public mobile communication cannot reach some areas, the speed is low, the security of overseas satellite communication systems is not guaranteed, and the cost is high. The domestic satellite communication system, especially the medium and high-orbit large-capacity satellite communication system, has a complex structure and poor application convenience. In recent years, the domestic low-orbit satellite communication system has developed rapidly and has the characteristics of convenient application, large bandwidth and safety and reliability, which provides effective communication support for the transmission and application of meteorological and oceanic information of industry users. The existing technology has the defects of low bandwidth, large time delay and high cost, and cannot provide automatic intelligent switching of data paths according to data volume. Therefore, it is urgent to propose a meteorological and oceanic information transmission method based on low-orbit satellites. SUMMARY

[0003] To solve the above technical problems, the application provides a meteorological and oceanic information transmission method based on low-orbit satellites, which improves the transmission efficiency and accuracy, reduces the cost and improves the safety.

[0004] To achieve the above purpose, the application provides a meteorological and oceanic information transmission method based on low-orbit satellites, which comprises:

[0005] A low-orbit satellite communication system is used to establish a bidirectional data link between a gateway station and a terminal;

[0006] Real-time observation data of monitoring equipment are collected and transmitted back to the satellite network gateway station through satellite Internet;

[0007] A distributed architecture is used to store meteorological and oceanic environmental data, fusion products and ocean monitoring data;

[0008] Based on numerical prediction products, a strong convective weather drop zone forecast is generated;

[0009] A wideband communication link is used to load large data volume products, and a narrowband communication link is used to receive real-time observation data;

[0010] According to weather conditions, a wideband or narrowband communication link is dynamically selected for data distribution;

[0011] The terminal station stores the decrypted and decompressed data in a data management platform and provides data services to the accompanying support terminal through a service interface.

[0012] Optionally, the observation data of the monitoring device is collected in real time, and is transmitted back to the satellite network gateway station through satellite Internet, and the observation data of the monitoring device includes:

[0013] The marine environment data short message of the monitoring device is received by using wireless communication technology;

[0014] The automatic collection and access of hydro-meteorological data is realized by using file transfer protocol;

[0015] The temperature and salinity data observed by the submarine buoy and the underwater glider are subjected to format inspection, time range inspection and correlation inspection;

[0016] The standardized data set files are generated according to the sea area, time range and data source of the elements.

[0017] Optionally, the meteorological and marine environment data, the fusion product and the marine monitoring data are stored by using a distributed architecture, and the method comprises the following steps:

[0018] The meteorological and marine environment data storage management module constructs a distributed storage platform;

[0019] The fusion product storage management module pre-processes the numerical prediction product;

[0020] The marine monitoring data storage management module manages the sensor observation data after quality control;

[0021] The meteorological and marine environment data service and the geographic information service are provided through the wideband communication link;

[0022] The sensor data is pushed in real time through the narrowband communication link.

[0023] Optionally, the strong convective weather falling zone prediction is generated based on the numerical prediction product, and the method comprises the following steps:

[0024] The strong convective weather is classified and judged by using the threshold method and the ingredient method based on the numerical prediction product;

[0025] The falling zone prediction interpretation application product of thunderstorm, icing and pitching is generated;

[0026] The falling zone prediction interpretation application product is pre-processed and stored in the distributed storage platform.

[0027] Optionally, the wideband communication link is used to load the large data volume product, and the narrowband communication link is used to receive the real-time observation data, and the method comprises the following steps:

[0028] The switching display of the topographic map and the image map is realized by using WebGIS technology;

[0029] The comprehensive map, the radar, the cloud map and the prediction product are loaded through the wideband communication link;

[0030] Receiving real-time observation data and early warning information through narrowband communication link;

[0031] Local storage management of meteorological ocean historical data and geographic information data.

[0032] Optionally, dynamically selecting wideband or narrowband communication link for data distribution according to weather conditions includes:

[0033] Using Zstandard algorithm to compress standard format data packet;

[0034] Using low compression level to process real-time push product;

[0035] Using high compression level to process batch data;

[0036] Using AES-256 and MD5 algorithm to encrypt compressed data packet;

[0037] Broadcasting encrypted data packet through satellite uplink.

[0038] Optionally, data processing process of terminal station includes:

[0039] Executing decryption and decompression operation on received service guarantee product data packet;

[0040] Storing parsed data into station data management platform;

[0041] Providing data service through HTTP service interface;

[0042] Real-time pushing simplified version data to accompanying type guarantee terminal through WebSocket protocol.

[0043] Optionally, low earth orbit satellite communication system includes:

[0044] 7 low earth orbit satellites of space segment, user forward link uses Ka frequency band;

[0045] Special gateway station and ground control center of ground segment;

[0046] Wide and narrow band communication terminal of user segment.

[0047] The technical effect of the present application is that the meteorological ocean information transmission method based on low-orbit satellites uses low-orbit satellite Internet to solve the problems of low speed and large time delay of high-orbit satellite network, and automatically selects the data link through data type and data volume modes such as intelligent switching, thereby improving communication efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0049] Figure 1 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0050] Figure 2 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0051] Figure 3 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0052] Figure 4 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0053] Figure 5 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings:

[0054] Figure 6 The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the present application and its implementation, and are not intended to constitute an improper limitation of the present application. In the drawings: DETAILED DESCRIPTION

[0055] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0057] As Figure 1As shown, this embodiment provides a method for transmitting meteorological and oceanographic information based on low-Earth orbit satellites, including:

[0058] The real-time monitoring information acquisition and processing mainly realizes the real-time collection of observation data from monitoring equipment such as buoys and underwater gliders. The real-time collected data is transmitted back to the StarNet gateway station via satellite Internet, and then transmitted to the National University of Defense Technology via a dedicated ground line. The real-time monitoring data is also subjected to quality control to generate a standard dataset.

[0059] Data management and services adopt a distributed architecture to store, manage and serve various types of data based on the StarNet cloud platform. It realizes the storage and management of meteorological and marine environmental data, fused products and marine monitoring data. It provides meteorological and marine environmental data, fused products and geographic information services to the accompanying support platform through broadband communication links, and pushes real-time observation data, forecast and early warning information and sensor data to the accompanying support platform in real time through narrowband communication links.

[0060] The fusion product is mainly based on the numerical weather prediction products of the National University of Defense Technology, and is used to realize the forecast interpretation of the landing areas of severe convective weather such as thunderstorms, icing, and turbulence.

[0061] The accompanying support platform is an accompanying support service terminal based on the StarNet communication protocol. It uses WebGIS technology to realize map functions. By calling the data service platform service interface of StarNet Digital Technology, it can realize the real-time loading and flexible multi-dimensional visualization of large amounts of data such as comprehensive maps, radar, cloud maps, forecast products, and fusion products based on broadband communication links, as well as the reception and display of observation data and forecast and early warning data through narrowband communication links.

[0062] like Figure 2 As shown, the process implemented in this embodiment is as follows:

[0063] Meteorological and oceanographic data, forecasts, and early warning services are transmitted by Xinhong High-Tech to the WXHLW data service platform via a dedicated network. Monitoring equipment such as underwater gliders equipped with IoT terminals transmit real-time ocean observation data back to the XW gateway station via the low-orbit WXHLW, and then back to the National University of Defense Technology via a dedicated ground line. The National University of Defense Technology then transmits the received ocean observation data and its own numerical weather prediction products to the WXHLW data service platform via a dedicated ground line, providing data support for real-time data processing and fusion product production.

[0064] Real-time meteorological and oceanographic data from the data source undergoes decoding and quality control through a quality control and standardization module, resulting in processed data and products. These are then loaded into the database via a data loading module. Numerical forecast products are processed through a fusion product creation module, and the fusion product data is loaded into the database.

[0065] Real-time meteorological and ocean data, fusion products and other data are uniformly managed by the data storage management module.

[0066] Various types of meteorological and ocean real-time data, meteorological and ocean historical data, meteorological and ocean forecast products, meteorological and ocean early warning products, and fusion products in the information service interface provide data and product services to the application layer through HTTP, FTP and other service methods.

[0067] The meteorological and ocean information portable support platform obtains various types of meteorological and ocean real-time data, forecast products, analysis and early warning products through the information service interface and performs visual display. DETAILED DESCRIPTION

[0069] S1, meteorological and ocean information data packet access and processing, meteorological and ocean real-time, forecast and early warning service support products are transmitted by a private network to a low-orbit satellite communication data service platform;

[0070] S1.1, meteorological and ocean information data packet content customization, data packet content customization is customized through a visual interface, and a customized data task is automatically generated;

[0071] S1.2, the customized data task uses a task scheduling mechanism, generates full-quantity data packets and incremental data packets according to task configuration information, the data packets are transmitted based on a private network, and the transmission volume is less limited, and a zip(Deflate) compression algorithm is used to compress the data packets;

[0072] S1.3, meteorological and ocean information data packet download, using HTTP / HTTPS protocol, through RESTful API or FTP and other methods, using an automatic transmission tool or manually according to needs to download data;

[0073] S1.4, meteorological and ocean information data packet import, according to actual environmental needs, automatically imported to the National University of Defense Technology cloud service platform through a CD ferry machine or other one-way transmission equipment;

[0074] S1.5, using meteorological and ocean information data packet unpacking program, unpacking the data packets through an automatic task, and storing them to the star network cloud platform according to different storage strategies according to the data types.

[0075] S2, real-time monitoring information collection and processing, underwater gliders and other monitoring equipment equipped with Internet of Things terminals transmit real-time collected ocean observation data back to the gateway station through the low-orbit satellite communication system, and then transmit the data back to the National University of Defense Technology through the ground special line. The National University of Defense Technology transmits the received ocean observation data and self-owned numerical forecast products to the low-orbit satellite communication data service platform to provide data support for real-time data processing and fusion product production.

[0076] S2.1, the monitoring information collection utilizes wireless communication technology to receive short messages of marine environment data of underwater monitoring equipment such as buoys and underwater gliders in real time, and forms complete data files of observation data.

[0077] S2.2, the monitoring information transmission automatically and manually collects and accesses real-time hydrological and meteorological data of buoys and the like through file transfer protocol, disk mapping and the like, supports multiple file transfer protocols such as NFS, FTP and HTTP, and ensures real-time transmission of multi-source real-time hydrological and meteorological data.

[0078] S2.3, quality control is an important link in data collection and processing. Before the data is applied, the data applied must be checked and processed. The main goal of quality control is to ensure the quality of the data provided in the storage and external service. The quality control module mainly controls the temperature and salt data observed by the submerged buoy and underwater glider. The quality control method includes format verification, time range verification, latitude and longitude range verification, landing verification, missing data verification, correlation verification, range verification and the like.

[0079] S2.4, the monitoring information standardization processing mainly filters, outputs, classifies, reasonably formats and traces metadata information according to the requirements of elements, sea area, time range and data source. The data set file will be stored in the form of a file to provide data support for the application service system.

[0080] S3, meteorological and ocean data have high spatio-temporal resolution, multi-source heterogeneity and large data volume, which need to be managed and pushed in real time. The traditional data pushing method is limited by bandwidth and network stability, and it is difficult to meet the needs of remote areas or marine scenes; although satellite pushing has wide coverage, it lacks data compression and encryption, and there are efficiency and security problems. In addition, the data management lacks standardized processes, resulting in inconsistent or delayed pushed data. Therefore, the star network cloud platform data management and distribution are used for comprehensive management and pushing method, supporting multiple pushing methods (satellite, Internet), and integrating efficient compression and encryption technology.

[0081] S3.1, the star network cloud platform data management will comprehensively manage the meteorological and ocean information data packets accessed from the dedicated line and the real-time monitoring information processed by the standardization;

[0082] S3.2, the star network cloud platform extracts data packets according to the needs of business support, including extracting large service support products and simplified service support products, and forming data packets in a standard format;

[0083] S3.3, using Zstandard algorithm to compress the data packet in standard format to form a binary data stream, the priority low compression level of the service guarantee product with real-time push demand is reduced to reduce the compression delay and achieve fast compression, and high compression level is used for batch data compression to save bandwidth;

[0084] S3.4, the compressed data packet is encrypted by using AES-256, MD5 and other encryption algorithms to output as an encrypted data packet;

[0085] S3.5, the encrypted and compressed data packet is sent to a low-orbit or high-orbit gateway station, and the gateway station broadcasts to a low-orbit or high-orbit satellite through an uplink.

[0086] S4, the data distribution of meteorological and oceanic information by using high and low orbit satellite communication link.

[0087] S4.1, the compressed and encrypted data packet is sent to a high-orbit gateway station, and the gateway station broadcasts to a high-orbit satellite through an uplink, and a high-orbit terminal receives downlink data, decrypts and decompresses, and stores and manages the data in the terminal station and provides services;

[0088] S4.2, the low-orbit data service platform sends the compressed and encrypted service guarantee product data packet and the simplified version of the service guarantee product data packet to a low-orbit gateway station, and when the weather is good, the compressed and encrypted service guarantee product data packet is distributed to a shore-based mobile data center and a shipborne terminal through a broadband communication terminal; when the weather is bad, such as heavy rain and fog, the Ka channel rain attenuation is serious, and the broadband communication is limited, and the simplified version of the service guarantee product data packet is distributed to the offshore user through a narrowband communication terminal.

[0089] S5, after the terminal station receives the data from the low-orbit or high-orbit satellite through the downlink, the data is stored and managed by the data storage management and service system of the terminal station, and the network facilities of the terminal station provide meteorological and oceanic information services to the accompanying guarantee terminal.

[0090] S5.1, after the terminal station receives the service guarantee product data packet data from the low-orbit or high-orbit satellite, the data is decrypted, decompressed and parsed, and stored in the data management platform of the station for unified storage management, and services are provided in the form of HTTP service interface;

[0091] S5.2, after the terminal station receives the simplified version of the service guarantee product data packet data from the low-orbit or high-orbit satellite, the data is decrypted, decompressed and parsed, and stored in the data management platform of the station for unified storage management, and real-time push is performed to the accompanying guarantee terminal through the WebSocket communication protocol.

[0092] S6, the accompanying type guarantee terminal realizes the map function by using WebGIS technology, realizes the real-time loading and flexible multi-dimensional visual display of large data volume such as comprehensive map, radar, cloud map, forecast product, fusion product based on wideband communication link by calling the service interface of the data service platform of the terminal station star network, and realizes the receiving and display of observation data and forecast warning data through narrowband communication link.

[0093] S6.1, the accompanying type guarantee terminal adopts offline data local storage management, and the historical, statistical analysis data, geographic information data and the like of meteorology and ocean are stored and managed locally, so as to realize the basic application capability support in the networkless or weak network environment.

[0094] S6.2, the accompanying type guarantee terminal adopts long-time data local storage management and application support, acquires large data volume of comprehensive map, radar, cloud map, forecast product, fusion product and the like by using the real-time loading and preloading combination mode through calling the service interface of the terminal station data service platform, and stores and manages the data locally, so as to realize the real-time application in the conventional network environment and the guarantee application in the networkless or weak network environment.

[0095] S6.3, the accompanying type guarantee terminal opens the communication interface of the terminal station to listen to the WebSocket, receives the real-time monitoring, early warning and the like information collected from various channels by the star network cloud platform and broadcasted by the low-orbit satellite, realizes the real-time notification and display application.

[0096] As shown in Figure 3 , the main functions of real-time monitoring information collection and processing include monitoring information collection, monitoring information transmission, monitoring information quality control and monitoring information standardization processing.

[0097] The functions of each module are as follows:

[0098] Monitoring information collection: the monitoring information collection receives the ocean environment data short message of the underwater monitoring equipment such as buoy and underwater glider in real time by using wireless communication technology, and forms the complete data file of observation data.

[0099] Monitoring information transmission: the monitoring information transmission automatically and manually collects and accesses the real-time hydrological and meteorological data of the buoy data and the like by using the file transmission protocol and disk mapping mechanism, supports multiple file transmission protocols such as NFS, FTP and HTTP, and guarantees the real-time transmission of multi-source real-time hydrological and meteorological data.

[0100] Monitoring information quality control: Data quality control is an essential part of data collection and processing. Before data is applied, it must first be checked and processed for quality. The main goal of quality control is to ensure that the data provided in the storage and external services has certain quality assurance. The quality control module mainly controls the quality of the temperature and salinity data observed by the subsurface buoy and underwater glider. The quality control methods include format verification, time range verification, latitude and longitude range verification, landing verification, missing data verification, correlation verification, and range verification.

[0101] Monitoring information standardization processing: Data standardization processing is mainly to filter and output data set files that are classified reasonably, have uniform formats, and have traceable metadata information according to the requirements of elements, sea areas, time ranges, and data sources. The data set files will be stored in the form of files to provide data support for application service systems.

[0102] Data management and service: A distributed architecture is used to realize the storage, management, and service of various data based on the star network cloud platform. The storage and management of meteorological and ocean environmental data, fusion products, and marine monitoring data are realized. Through a wideband communication link, meteorological and ocean environmental data, fusion products, and geographic information services are provided for the accompanying support platform. Through a narrowband communication link, real-time observation data, forecast and warning information, and sensor data are pushed to the accompanying support platform in real time. Data management and service are composed of seven modules, including meteorological and ocean environmental data storage management, fusion product storage management, marine monitoring storage management, meteorological and ocean environmental data service, fusion product service, marine monitoring data service, and geographic information service, as shown in Figure 4 .

[0103] The functions of each module are as follows:

[0104] Meteorological and ocean environmental data storage management: The meteorological and ocean environmental data package fusion function is realized, which can automatically download meteorological and ocean environmental data packages. After downloading, the data is imported into the cloud platform for storage management through data import software. For structured, semi-structured, and unstructured meteorological and ocean data, a distributed storage platform with reasonable structure, efficient storage, and platform scalability is constructed based on the properties and usage requirements of the data. The platform can safely and effectively manage various types of data.

[0105] Fusion product storage management: The storage and management of fusion products based on the numerical prediction of the University of Science and Technology are realized. The fusion products are preprocessed, and the fusion product service is realized based on the star network cloud platform using distributed micro-service technology. The fusion product service is provided to the accompanying support platform through a wideband communication link.

[0106] Marine monitoring data storage management: Based on the storage and management capabilities of the star network cloud platform, the storage and management of sensor observation data after quality control are realized.

[0107] Meteorological and oceanic environmental data service: based on the Star Network cloud platform, the distributed micro-service technology is used to realize the comprehensive service of meteorological and oceanic environmental data. The multi-source meteorological and oceanic real-time data, forecast data, warning information and other meteorological and oceanic environmental data services are provided through the wideband communication link. The real-time observation data can be pushed to the accompanying support platform through the narrowband communication link. The meteorological and oceanic real-time data includes routine meteorological observation data, buoy, tide, land hydrology, etc.

[0108] Fusion product application service: preprocessing of fusion products, providing fusion product services based on the Star Network cloud platform, and providing fusion product services for the accompanying support platform through the wideband communication link.

[0109] Ocean monitoring data service: real-time pushing of sensor data to the accompanying support platform through the narrowband communication link.

[0110] Geographic information service: deploying geographic information service on the Star Network cloud platform, deploying map data such as image map and topographic map, and providing map data service through the wideband communication link.

[0111] Accompanying support platform: developing an accompanying support service terminal based on the Star Network communication protocol, using WebGIS technology to realize map function, calling the data service platform service interface of Star Network Science and Technology, realizing real-time loading and flexible multi-dimensional visualization display of large data volume such as comprehensive map, radar, cloud map, forecast product and fusion product based on the wideband communication link, and realizing receiving and display of observation data and forecast warning data through the narrowband communication link. The accompanying support platform mainly consists of map support, location weather, radar monitoring, satellite cloud map, aviation meteorology, tropical cyclone, auxiliary decision, professional meteorology, facsimile map, land hydrology, fusion product and ocean monitoring data display modules, as shown in Figure 5

[0112] The functions of each module are as follows:

[0113] Map support: the map support module mainly includes: basic map, GIS basic operation, layer display control and other contents, wherein the map includes the switching display of topographic map, image map and vector map.

[0114] ​Position weather: The position weather module includes the display of real-time weather maps, warning maps and information, filling maps, air temperature, radar, ground wind, precipitation, VIS, AQI, and airport live information in the current location and the country. For the current location, it provides the changes in the live information of the city in the last 24 hours (including air temperature, humidity, wind, cloud cover, precipitation, and visibility), provides the hourly filling map information plot in the last 24 hours (including air temperature, humidity, wind, cloud cover, and precipitation), provides the city weather forecast for the next three days (weather phenomenon, cloud cover, temperature, sea level pressure, relative humidity, precipitation, temperature, wind direction, and wind speed), and provides numerical forecast information for the next 10 days (including air temperature, sea level pressure, potential height, wind speed, wind direction, relative humidity, visibility, precipitation, CAPE, icing, and turbulence).

[0115] Radar monitoring:

[0116] The radar monitoring module includes the query and display functions of real-time single-station radar and radar mosaic products. It supports the dynamic playback and viewing of radar echo images for the last 6 hours according to time strips, and provides short-term radar products for the next 2 hours and every 10 minutes.

[0117] Satellite cloud image: The satellite cloud image module provides the query and display of "Fengyun" series satellite cloud images and inversion products. It supports the query and display of GOES-8 satellite cloud image products, supports the query of hourly cloud image products for the last 24 hours according to time strips, and supports the dynamic playback of satellite cloud image products.

[0118] Aviation meteorology:

[0119] The aviation meteorology module includes airport weather, common routes, and route customization. Among them, the airport weather displays the airport light display map of China and surrounding countries and regions, the pop-up window displays the weather live (METAR), airport forecast (TAF), aviation dangerous weather, and time profile of the concerned airport, and provides filling map display of the airport; in the common route, the customized route is listed, the route trajectory is displayed graphically, and the meteorological information and route spatial profile of the route point can be displayed in the pop-up window by clicking the route point, and the weather of the takeoff and landing airport and the icing and turbulence of the route can be understood from the route spatial profile; the route composed of the takeoff field, passing point, and landing field can be customized according to the task needs.

[0120] Tropical cyclone: The tropical cyclone module supports the query of current and historical tropical cyclones, and the superimposed map display contains cyclone location, intensity, gale circle (different directions are distinguished), and forecast path information (including the Central Meteorological Observatory and other options). It supports the simultaneous display of multiple tropical cyclones. The tropical cyclone data for the last 20 years can be queried as needed.

[0121] Auxiliary decision: the auxiliary decision module displays the influence list through the list; support task editing: customizable task name, range, and determine the critical threshold of the task "favorable", "marginal", "unfavorable" meteorological and oceanic elements according to the task meteorological conditions; the influence degree of meteorological and oceanic environment on the task is displayed by "red", "yellow" and "blue" three-color grid charts, and the meteorological and oceanic information of a certain grid point can be displayed in a pop-up window.

[0122] Professional meteorology: the professional meteorology module provides high-altitude different levels of temperature, height, humidity, wind field and other elements based on European fine grid numerical prediction products, can provide flexible selection query according to time, level, element and can perform multi-element superposition display. The display of temperature, pressure, humidity and wind of ground, 925hPa, 850hPa, 700hPa, 500hPa, 300hPa, 200hPa, 100hPa, 50hPa and other levels is supported; and the query and display of icing, pitching and other interpretation application product prediction fields are supported.

[0123] Fax chart: the fax chart query display module can query and display the latest published Japanese fax chart and European fax chart.

[0124] Land hydrology: the land hydrology module displays the positions of national hydrology stations, and provides the display of water level height and whether the water level exceeds the warning water level, displays the hydrology state curve of the hydrology station in the recent 7 days, displays the domestic water system diagram and supports multi-level fine display, and supports 6h, 12h and 24h rainfall color spot diagram display.

[0125] Fusion product: the fusion product module realizes the query and display of fusion products, including thunderstorm, heavy rain, thunderstorm gale, hail and other severe convective weather display, sea mesoscale vortex display and air wind, temperature and humidity correction forecast display.

[0126] Ocean monitoring data: the ocean monitoring data receiving and display module receives sensor data pushed by the data cloud platform in real time, displays the sensor position through the map position identification, and displays the sensor data through the chart.

[0127] The low-orbit satellite communication network test of the application mainly solves the interconnection and intercommunication of meteorological data based on a low-orbit experimental constellation to realize the interconnection and intercommunication of vehicles, ships and airborne and gateway stations. Figure 6 As shown in the satellite communication network topology.

[0128] The low-orbit experimental constellation of Galaxy Aerospace Little Spider adopts a "sky-star ground network" working mode, that is, a Ka-V bidirectional data link is constructed through satellite communication transparent forwarding load, ground gateway station and control center and user terminal, the terminal and the gateway station have automatic link building capability, and the air interface supports narrowband communication and broadband communication of 5G-NTN system. The specific composition includes a space segment, a ground segment and a user segment, and the main functions of each part are as follows:

[0129] Space segment: The space segment includes 7 satellites of the Galaxy Space Small Spider Web System, which carries a transparent transponder to realize transparent forwarding of signals between the gateway and the terminal. The user's forward link uses Ka frequency band, and the uplink and downlink feeder links use V frequency band. The orbital parameters of the 7 satellites are shown in Table 1.

[0130] Table 1

[0131]

[0132] Ground segment: The ground segment includes a dedicated gateway and a ground control center. The dedicated gateway establishes a V link with the satellite in orbit through a ground V antenna, and realizes user beam coverage through a transparent transponder, realizes dynamic access, beam switching control, data transmission, and measurement and control communication business functions of each terminal in the coverage area, receives instruction information from the ground task center and uploads target terminals, and receives telemetry information from the terminal and transmits it to the ground control center. The ground control center is connected to the dedicated gateway through the ground network, realizes remote terminal platform running state monitoring and information processing, and completes the platform instruction processing and uploading.

[0133] An application example of the present application:

[0134] Using the first domestic low-orbit communication satellite constellation composed of 8 low-orbit communication satellites for industry application demonstration and verification, communication service rapid deployment and meteorological and oceanic information transmission application tests in three application scenarios of shipborne, vehicle-mounted and unmanned aerial vehicle relay are carried out. This experiment uses 38 orbit times of domestic low-orbit satellite communication resources, deploys 1 set of mobile gateway in China Electronics Ocean Information Industry Base, uses 1 set of wideband and narrowband communication terminals, carries out 2 voyages of ship experiments, 3 times of vehicle-mounted mobile communication experiments, 4 times of unmanned aerial vehicle relay experiments, and 4 times of land-based fixed station experiments in the sea area around Lingshui, Hainan, realizes the transmission application of 19 types of military meteorological and oceanic information data such as numerical prediction, mesoscale vortex diagnostic products, atmospheric waveguide service products, observation live, sounding report, satellite cloud image and weather radar detection of the project, actually measures that the maximum speed of wideband communication is 160Mbps, the maximum speed of narrowband communication is 1.456Mbps, the single-orbit actually measured meteorological and oceanic data transmission capacity is not less than 1.4G, the maximum single meteorological and oceanic data packet transmission capacity is 800M, and the continuous service mode has the breakpoint resume transmission function.

[0135] The tasks completed are as follows:

[0136] 1. Task simulation:

[0137] In the mission simulation phase, the mission running scenarios are simulated by the Galaxy simulation software. According to the user communication requirements, the orbits of the small spider web satellites (6 satellites), resource allocation, and link performance are analyzed.

[0138] The mission simulation includes evaluating coverage time, inter-satellite / earth-space link efficiency, mission conflict possibility, etc., to ensure the feasibility of the mission plan and optimize resource utilization. The transparent transponder on board the satellite is used to realize transparent forwarding of signals between the gateway station and the terminal. The user return link uses Ka frequency band, and the uplink / downlink feeder link uses V frequency band.

[0139] According to the selected location of the gateway station and the terminal, the emission EIRP index, the reception G / T index, and the highest elevation angle, the Galaxy constellation is simulated, and the results are screened and output.

[0140] 2. Mission planning:

[0141] The mission planning phase is based on the ground segment and the space segment to develop a detailed mission plan. It includes:

[0142] (1) Ground segment and space segment mission planning, including satellites, gateway stations, and terminals;

[0143] (2) Resource allocation: allocating satellite beams, bandwidth, power, and time windows according to communication requirements;

[0144] (3) Earth-space link planning: determining satellite and ground station uplink / downlink scheduling;

[0145] (4) Conflict management: avoiding resource competition among multiple tasks and optimizing task priority.

[0146] 3. Mission implementation:

[0147] The mission implementation phase converts the plan into actual operation.

[0148] (1) The ground control center sends instructions to the satellite to configure the communication payload;

[0149] (2) The satellite adjusts its attitude according to the instructions and points to the target ground station;

[0150] (3) The ground segment gateway station and terminal configure the satellite tracking, radio frequency, baseband, and network configuration according to the requirements of the mission plan;

[0151] (4) Establish a two-way communication link, establish a TCP stable link, and ensure the smoothness of the tracking process, while the receiving equipment completes data reception.

[0152] 4. Mission effectiveness:

[0153] The satellite provides specific services for users, and the system mainly provides network access services for C-end users, so the user terminal mainly accesses the local area network through the low-orbit satellite link to access various services provided by the local area network.

[0154] The service process between the low-orbit satellite terminal and the gateway station is as follows:

[0155] (1) According to the task planning, complete the injection of parameters such as service type and communication mode, and realize it;

[0156] (2) The satellite terminal first initiates a random access process with the low-orbit gateway station access network to perform uplink synchronization;

[0157] (3) The satellite terminal sends an RRC connection establishment request to the access network, carrying the AS initial identifier and establishment reason of the terminal, etc.;

[0158] (4) The access network replies to the RRC connection establishment response, carrying the complete configuration information of SRB1;

[0159] (5) The satellite terminal sends an RRC connection establishment completion to the access network, carrying the uplink NAS message, i.e. service request. The access network selects the core network and forwards the service request message;

[0160] (6) The core network and the access network establish an initial context, and the access network performs RRC connection reconfiguration on the satellite terminal;

[0161] (7) The low-orbit satellite terminal and the ground network perform uplink and downlink data packet transmission and reception;

[0162] (8) After the system establishes a link, user data packets begin to be transmitted, including observation live, satellite cloud map, weather radar echo map, regular weather map and numerical weather forecast data packets;

[0163] (9) The user transmission data is displayed in real time on the pad and collected, stored and analyzed.

[0164] The low-orbit satellite in this embodiment has significant advantages in security, mainly reflected in the following aspects:

[0165] Anti-interference and anti-deception: The signal beam of the low-orbit satellite is more concentrated, so under the same transmission power, the signal suffers less free loss. This not only improves the reliability of the signal, but also enhances the anti-interference ability of the system. In addition, the rapid response capability of the low-orbit satellite enables it to quickly adjust when it is interfered, ensuring the continuity and security of communication.

[0166] Network Security Technology: In the field of low-orbit satellite network security, various defense technologies have been developed, including encryption-based methods, elastic routing-based methods, and virtualization technology-based methods. These technologies can ensure that satellite-transmitted data is not illegally modified, while tracking and verifying the source of each request through distributed and consensus operations, effectively preventing DoS and DDoS attacks.

[0167] Military Applications: In the military field, low-orbit satellites have become an important means of communication support due to their high reliability and rapid deployment capabilities. They can provide all-weather communication services for combat troops, ensuring smooth communication in complex battlefield environments.

[0168] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for transmitting meteorological and oceanographic information based on low-Earth orbit satellites, characterized in that, include: Establish a two-way data link between the gateway station and the terminal through a low-Earth orbit satellite communication system; Real-time collection of observation data from monitoring equipment, and transmission back to the StarNet gateway station via satellite internet; A distributed architecture is used to store meteorological and marine environmental data, fused products, and marine monitoring data. Generate severe convective weather location forecasts based on numerical weather prediction products; Large data volumes of products are loaded via broadband communication links, while real-time observation data is received via narrowband communication links. The data distribution is dynamically selected based on weather conditions, using either broadband or narrowband communication links. After decrypting and decompressing the received data, the terminal station stores it in the data management platform and provides data services to the accompanying support terminal through the service interface.

2. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, Real-time collection of observation data from monitoring equipment, and transmission back to the StarNet gateway station via satellite internet, including: Utilize wireless communication technology to receive short messages of marine environmental data from monitoring equipment; Automatic collection and access of hydrological and meteorological data is achieved through file transfer protocols; Perform format checks, time range checks, and correlation checks on the temperature and salinity data observed by submerged buoys and underwater gliders; Standardized dataset files are generated based on the sea area, time range, and data source of the elements.

3. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, The distributed architecture is used to store meteorological and marine environmental data, fused products, and marine monitoring data, including: The meteorological and marine environmental data storage management module constructs a distributed storage platform; The integrated product storage management module preprocesses numerical weather prediction products; The marine monitoring data storage and management module manages quality-controlled sensor observation data; Provide meteorological and marine environmental data services and geographic information services through broadband communication links; Sensor data is pushed in real time via a narrowband communication link.

4. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, The forecast of severe convective weather locations generated based on numerical weather prediction products includes: Severe convective weather classification is based on numerical weather prediction products using threshold and ingredient methods. Generate application products for forecasting and interpreting the landing areas of thunderstorms, icing, and turbulence; The landing area forecast interpretation application products are preprocessed and then stored in a distributed storage platform.

5. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, Loading large-volume products via broadband communication links and receiving real-time observation data via narrowband communication links include: WebGIS technology is used to switch between topographic maps and imagery. Integrated maps, radar images, cloud images, and forecast products are loaded via broadband communication links; Real-time observation data and early warning information are received via narrowband communication links; Localized storage and management of historical meteorological and oceanographic data and geographic information data.

6. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, Dynamically selecting broadband or narrowband communication links for data distribution based on weather conditions includes: The Zstandard algorithm is used to compress standard format data packets; Low compression levels are used for real-time push products; Apply high compression levels to batch data; The compressed data packets are encrypted using AES-256 and MD5 algorithms. Encrypted data packets are broadcast via satellite uplink.

7. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, The data processing procedure at the terminal station includes: Perform decryption and decompression operations on the received service assurance product data packets; The parsed data will be stored in this site's data management platform; Provide data services through HTTP service interfaces; A simplified version of the data is pushed to the accompanying security terminal in real time via the WebSocket protocol.

8. The meteorological and oceanographic information transmission method based on low-orbit satellites as described in claim 1, characterized in that, Low Earth orbit satellite communication systems include: The seven low-Earth orbit satellites in the space segment use the Ka band for user forward and return links; Dedicated gateway stations and ground control centers for the ground segment; Broadband and narrowband communication terminals for user segments.

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