CN107392590B - Beidou short message-based electronic chart post-payment system and method - Google Patents
Beidou short message-based electronic chart post-payment system and method Download PDFInfo
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Abstract
The invention discloses an electronic chart post-payment system based on Beidou short messages, which comprises: the ship-borne Beidou navigation tracking terminal is used for acquiring real-time ship positions of ships, packaging the ship positions into Beidou short messages, sending the Beidou short messages to the Beidou satellite, and receiving Beidou short messages confirmed by the Beidou satellite; the Beidou satellite, the Beidou commander and the Beidou communication management server are used for receiving and transmitting Beidou short messages, feeding back and confirming the Beidou short messages to the shipborne Beidou navigation tracking terminal and transmitting the Beidou short messages to the cloud server; the cloud server is used for decoding the Beidou short message to obtain and record the actual navigation track of the ship, generating a payment list and pushing the payment list to the user side; the user side is used for confirming payment; and the electronic chart maintenance terminal is used for maintaining the electronic chart and map sheet coverage data of the cloud server. The invention provides safe and reliable electronic chart use basis for electronic chart service providers and data users, and achieves an economic and efficient electronic chart service mode of first use and then payment.
Description
Technical Field
The invention relates to the technical field of Beidou satellite communication, in particular to an electronic chart postpaid payment system and method based on Beidou short messages.
Background
The Beidou Satellite Navigation System (BDS) in China is a self-developed global Satellite Navigation System in China, and is the third mature Satellite Navigation System following the United states Global Positioning System (GPS) and the Russian Glonass Satellite Navigation System (G L ONASS). The Beidou Satellite Navigation System aims to provide high-quality positioning, Navigation, time service and communication services for global users and can provide further services for authorized users with higher requirements.
In 11 months 2014, the beidou satellite navigation system gained International Maritime Organization (IMO) approval as part of the global radio navigation system (WWRNS) at the 94 th conference held by the international maritime organization (MSC). The Beidou satellite navigation system can provide services such as monitoring, emergency and search and rescue for terminal users in the ocean, desert, remote mountain areas and other areas without public internet signals.
The electronic chart (ENC) is a vector electronic chart conforming to the IHO S57 standard, which is produced by the maritime ministry of Health (HO) of each country. Thousands of ENCs around the world are the foundation for supporting the primary navigation equipment of ships, the electronic nautical chart display and information system (ECDIS) application. The electronic chart data used by the ECDIS is purchased by an authorized data provider and installed for use. Generally, after a navigation plan is made, a planned airline is purchased for installation and use before a ship is departed from a port according to the plan, and then the airline needs to be adjusted to change electronic chart data, needs to be purchased again, downloads data through a maritime satellite and involves expensive communication cost. The post-payment system changes the use payment mode of the electronic chart, the ship adopting the post-payment mode can obtain the electronic chart (even all the electronic charts) of a sea area with a larger coverage area than a planned route from a data provider in advance, install the electronic chart on the ECDIS equipment and can browse the electronic chart free of charge, and the part needing to be paid actually is the chart sheet through which the ship sails, so that the ordering, installing and using processes are greatly simplified, and the cost of expensive satellite communication is saved.
The existing electronic chart post-payment application technology has the following defects: (1) the United states Global Positioning System (GPS) is adopted as a main positioning device, which does not meet the requirements of national commercial interests and security; (2) the maritime satellite communication mode is adopted, ship position information is transmitted through the overseas ground station, equipment purchase and data flow cost are high, the safety and confidentiality problems are also involved, and the system is not suitable for being used by government official ships and naval ships; (3) the ship position report uses the universal ship interval and format of the maritime satellite, the data is not optimized, the data volume is large, and the cost is high.
Therefore, how to design a safe and reliable electronic chart postpaid service platform based on reliable recording of ship navigation track to generate electronic chart data becomes a new research and development direction.
Disclosure of Invention
The invention aims at the problem, and provides an electronic chart post-payment system based on Beidou short messages, which comprises a Beidou satellite, a Beidou commander, a Beidou communication management server, a cloud server, an electronic chart maintenance terminal, at least one shipborne Beidou navigation tracking terminal and at least one user side, wherein each shipborne Beidou navigation tracking terminal corresponds to a terminal number;
the shipborne Beidou navigation tracking terminal is used for acquiring, storing and processing real-time ship position data of a ship, packaging the real-time ship position data into a Beidou short message, sending the Beidou short message to the Beidou satellite together with a terminal number, and receiving and confirming the Beidou short message;
the Beidou satellite is used for receiving the Beidou short message and the terminal number and transmitting the Beidou short message and the terminal number to the Beidou commander;
the Beidou commander is used for receiving and forwarding the Beidou short message and the terminal number to the Beidou communication management server;
the Beidou communication management server is connected with the Beidou commander, receives and analyzes the Beidou short message and the terminal number, transmits an analysis result to the cloud server, generates a confirmation Beidou short message and transmits the confirmation Beidou short message to the shipborne Beidou navigation tracking terminal;
the cloud server is used for decoding the Beidou short message to obtain and record the actual sailing track of the ship, storing the coverage information of the electronic chart data, periodically generating an electronic chart use record and a fee list and pushing the electronic chart use record and the fee list to a user side;
the electronic chart maintenance terminal is used for maintaining and managing the data coverage and price change of the paid electronic chart;
and the user side is used for inquiring the number of the electronic charts and the expense list actually used by the ship in a certain voyage and confirming payment.
Preferably, the shipborne Beidou navigation tracking terminal comprises a Beidou positioning module RNSS, an information processing module and a Beidou short message communication module RDSS;
the Beidou positioning module RNSS is used for acquiring real-time ship position data of a ship and transmitting the real-time ship position data to the information processing module;
the information processing unit is used for acquiring, processing and storing the real-time ship position data of the ship transmitted by the Beidou positioning module RNSS, comparing the real-time ship position with the previous historical ship position, if the real-time ship position is displaced, processing and converting the real-time ship position into a track report point, and packaging the track report point into a Beidou short message and transmitting the Beidou short message and a terminal number to the Beidou short message communication module RDSS;
the Beidou short message communication module RDSS receives the Beidou short messages and the terminal numbers transmitted by the information processing unit, transmits the Beidou short messages and the terminal numbers to a Beidou satellite, and receives and confirms the Beidou short messages and transmits the Beidou short messages to the information processing unit;
preferably, the shipborne Beidou navigation tracking terminal further comprises a configuration interface and a shipborne power module, wherein the configuration interface is connected with the information processing unit, and when the information processing unit fails to receive the Beidou confirmation short message, the corresponding ship position data in the information processing unit is downloaded to the configuration interface; the marine power module supplies power for the shipborne Beidou navigation tracking terminal and provides a stable working power supply.
Preferably, the information processing unit comprises an embedded processing unit and a track report point calculation and message coding unit, and the embedded processing unit is used for receiving, transmitting, processing and storing data; and the track report point calculation and message coding unit is used for processing the real-time ship position data of the ship, generating a track report point, packaging the track report point into a Beidou short message, and transmitting the Beidou short message and a terminal number to the Beidou short message communication module RDSS.
Preferably, the information processing unit is an embedded computer system with a microprocessing MCU, a memory and a storage.
Preferably, the real-time ship position data comprises ship navigation time, position, elevation, speed and course information.
The invention also provides an electronic chart postpayment method based on the Beidou short message, which comprises the following steps,
step S201, a shipborne Beidou track tracking terminal obtains real-time ship position data of a ship;
step S202, comparing the real-time ship position with the previous historical ship position by the shipborne Beidou track tracking terminal, and converting the real-time ship position into a track report point if displacement occurs;
step S203, the shipborne Beidou track tracking terminal buffers the track report point to be local until the track report point is successfully transmitted to a Beidou communication management server;
step S204, the shipborne Beidou track tracking terminal encapsulates one or more track report points into a Beidou short message, and the Beidou short message and a terminal number are sent to the Beidou satellite;
step S205, the Beidou satellite receives the Beidou short message and the terminal number and transmits the Beidou short message and the terminal number to the Beidou commander;
step S206, the Beidou commander receives the Beidou short message and the terminal number and transmits the Beidou short message and the terminal number to the Beidou communication management server;
step S207, the Beidou communication management system receives and analyzes the Beidou short message and the terminal number, sends an analysis result to the cloud server, sends the analysis result to the cloud server, and sends a Beidou short message confirmation to the shipborne Beidou track tracking terminal;
step S208, the cloud server decodes the Beidou short message to obtain a track report point of the shipborne Beidou track tracking terminal, and records the track report point into a database;
step S209, the cloud server periodically detects whether one of the shipborne Beidou track tracking terminals reaches a charging period, and if so, a charging process is started;
step S210, the cloud server obtains all track report point data and electronic chart frame coverage information in a certain time period of the shipborne Beidou track tracking terminal from a database according to a charging period, and calculates to obtain all electronic chart frame lists covered by the tracks;
step S211, the cloud server calculates the total cost of the ship in the charging period according to the price of the electronic chart and the map, generates a payment list and pushes the payment list to a ship manager;
and step S212, the ship manager accesses the cloud server through the Internet to confirm the ship navigation track and the map sheet list, confirms the charging list and pays.
Preferably, the real-time ship position data comprises ship navigation time, position, elevation, speed and course information.
Compared with the prior art, the invention has the following advantages: according to the invention, a safe and reliable ship navigation track basis is provided for the electronic chart service provider and the data user through the Beidou satellite, the shipborne Beidou navigation tracking terminal and the cloud server, so that an economic and efficient electronic chart service mode of using before paying is achieved. According to the invention, data transmission is realized by adopting a satellite communication mode of Beidou short messages, the terminal device has a simple structure and low cost, the high maritime satellite communication cost is not involved, and the optimized ship position report point screening algorithm reduces the communication frequency and the channel occupation. The Beidou satellite communication link is a safe position transmission channel for government official ships and naval ships.
Drawings
Fig. 1 is a schematic diagram of an embodiment of an electronic chart postpaid system based on beidou short messages in the invention.
Fig. 2 is a schematic structural diagram of a shipborne Beidou navigation tracking terminal in the embodiment of the method of the invention.
Fig. 3 is a schematic diagram of an embodiment of the electronic chart postpaid payment method based on the beidou short message in the present invention.
Fig. 4 is a diagram of a pre-assembled electronic chart web overlay usable in an example method of the present invention.
FIG. 5 is an electronic chart-sheet overlay actually used for navigation in an example of the method of the present invention.
Detailed Description
In order to facilitate the understanding and implementation of the present invention for those of ordinary skill in the art, the present invention is further described in detail with reference to the accompanying drawings and examples, it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention and are not restrictive thereof.
As shown in fig. 1, the electronic chart postpaid payment system based on the beidou short message in the invention comprises a beidou satellite 11, a beidou director 12, a beidou communication management server 13, a cloud server 14, an electronic chart maintenance terminal 15, at least one shipborne beidou navigation tracking terminal 16 and at least one user terminal 17.
The shipborne Beidou navigation tracking terminal 16 corresponds to a terminal number and is used for acquiring, storing and processing the current real-time ship position (including time, position, elevation and navigation speed and course information) and packaging the current real-time ship position into a Beidou short message, and the Beidou short message and the terminal number are sent to the Beidou satellite 11 together and used for receiving the Beidou short message confirmed by the Beidou satellite 11.
The Beidou satellite 11 is used for receiving the Beidou short message and the terminal number sent by the shipborne Beidou navigation tracking terminal 16 and sending the Beidou short message and the terminal number to the Beidou commander 12.
The big dipper commander 12 includes an antenna, a receiving device and a host computer, and is used for analyzing and positioning, communication and real-time monitoring, and can send messages in groups, groups and single. In the invention, the Beidou commander 12 is used for receiving the Beidou short message and the terminal number, and sending the content of the Beidou short message and the terminal number of the shipborne Beidou navigation tracking terminal 16 to the Beidou communication management server 13.
The Beidou communication management server 13 is used for connecting and managing the individual Beidou commanders or the clustered Beidou commanders 12, is a bridge and a middle layer for connecting the Beidou commanders 12 and the cloud server 14, enables deployment of the cloud server 14 to be more flexible, can build cloud service or use third party cloud service, and mainly completes route conversion of the Beidou short messages from Beidou satellites to the Internet, and the Beidou communication management server analyzes the Beidou short messages and terminal numbers, confirms that the terminal numbers are effective numbers and identification fields of the Beidou short messages are effective fields and correct check codes, generates the Beidou short messages for the corresponding terminal numbers, and feeds back the Beidou short messages to the shipborne Beidou navigation tracking terminal 16.
The cloud server 14 completes all service processing functions of the system, and mainly includes: 1. receiving and decoding the Beidou short message; 2. the position information of the shipborne Beidou navigation tracking terminal 16 is saved; 3. updating the coverage information of the electronic chart and the map sheet through the electronic chart maintenance terminal 15, and storing the coverage information in the cloud; 4. regularly generating an electronic chart use record and a payment list, and pushing the electronic chart use record and the payment list to the user terminal 17; 5. and responding to the ship sailing track and the electronic chart coverage query of the user terminal 17.
As shown in fig. 2, the shipborne beidou navigation tracking terminal in the present invention is a terminal device having beidou high frequency RDSS (satellite radio measurement service) message communication, and supporting beidou RNSS (satellite radio navigation service) passive positioning and beidou ship position obtaining buffering return communication functions. The Beidou positioning system comprises a Beidou positioning module RNSS21 used for acquiring real-time ship position data; the data includes: time, location, elevation, speed and course, etc.; the Beidou short message communication module RDSS23 is used for communicating with a Beidou satellite to receive and send Beidou short messages; the information processing unit 22 is used for completing data acquisition, processing and storage functions, and comprises an embedded processing unit 221 and a track report point calculation and message coding unit 222; the embedded processing unit 221 is used for receiving, transmitting, processing and storing Beidou data; the track report point calculating and message coding unit 222 is used for processing the real-time ship position data of the ship, generating track report points, packaging the track report points into a Beidou short message, and sending the Beidou short message and a terminal number to the Beidou short message communication module RDSS 23; the ship power supply module 24 is connected with a ship direct current power supply to form a stable working power supply; the configuration interface 25 is used to configure device parameters during factory installation and to download location data buffered in the device when the device fails to complete location feedback.
The Beidou positioning module RNSS21 is used for acquiring the current real-time ship position (including time, position, elevation and navigation speed and course information) data and inputting the data into the information processing unit 22.
The information processing unit 22 obtains real-time ship position (including time, position, elevation, speed and heading information) data input by the beidou positioning module RNSS21, and the embedded processing unit 221 and the track report point calculation and message coding unit 222 complete analysis, encapsulation and storage processing of the data.
The information processing unit 22 is an embedded computer system with a microprocessing MCU, a memory and a storage, and completes data input/output, processing and storage, the data processing is completed by the track report point calculation and message coding unit 222, the generated track report point and the beidou short message are stored in the storage, and the beidou short message is sent to the beidou short message communication module RDSS 23.
Further, the embedded processing unit 221 receives the confirmed beidou short message transmitted by the beidou short message communication module RDSS23, finds a corresponding message in the memory, marks that the transmission is successful, and deletes the message from the buffer.
The track report point calculation and message coding unit 222 processes the obtained real-time ship position data, compares the real-time ship position data with the previous ship position, converts the ship position with displacement into a track report point, and encapsulates the track report point and the message into a Beidou short message; the Beidou short message and the terminal number are sent to a Beidou short message communication module RDSS 23.
The Beidou short message communication module RDSS23 receives the Beidou short message sent by the information processing unit 22 and sends the Beidou short message to a Beidou satellite; the Beidou short message communication module RDSS23 receives the Beidou short message confirmation sent by the Beidou satellite and sends the Beidou short message confirmation to the information processing unit 22.
The ship power supply module 24 is connected with a ship direct-current power supply and converts a 24V direct-current voltage into a stably-output direct-current 5V equipment working voltage.
The configuration interface 25 is connected with a computer when the equipment is installed, and configures the equipment parameters; when the device fails to complete the location backhaul, the computer connects to the configuration interface 25 to download the location data buffered in the device that is not transmitted back to the cloud service.
Fig. 3 shows an electronic chart postpayment method based on the beidou short message, which is applied to the electronic chart postpayment system based on the beidou short message shown in fig. 1.
In step S201, the shipborne big dipper track tracking terminal obtains a ship real-time position (time, position, elevation, speed and course) and a big dipper terminal number.
In step S202, the shipborne beidou track tracking terminal compares the real-time ship position with the previous historical ship position, and if displacement occurs, the real-time ship position is converted into a track report point.
In step S203, the shipborne Beidou track tracking terminal buffers the track report point locally until the track report point is successfully transmitted to the Beidou communication management server.
In step S204, the shipborne Beidou track tracking terminal encapsulates one or more track report points into a Beidou short message, and sends the Beidou short message together with a terminal number to the Beidou satellite.
In step S205, the beidou satellite receives the beidou short message and the terminal number, and forwards the beidou short message and the terminal number to the beidou director.
In step S206, the beidou director receives the beidou short message and the terminal number of the tracking terminal, and sends the beidou short message and the terminal number to the beidou communication management server.
In step S207, the Beidou communication management system receives and analyzes the Beidou short message and the terminal number, sends the Beidou short message and the terminal number to the cloud server, sends an analysis result to the cloud server, and sends a Beidou short message confirmation to the shipborne Beidou track tracking terminal.
In step S208, the cloud server decodes the big dipper short message, obtains a track report point (time, position, elevation, speed and heading) of the shipborne big dipper track tracking terminal, and records the track report point into the database.
In step S209, the cloud server periodically detects whether a certain shipborne Beidou flight path tracking terminal reaches a charging period, and if so, starts a charging process.
In step S210, the cloud server obtains all track report point data T1 in a certain time period from the database of the shipborne beidou track tracking terminal shown in fig. 5 according to the charging period, obtains the electronic chart sheet coverage information shown in fig. 4 recorded by the electronic chart maintenance terminal from the chart database (where C1 to C4 are four small-scale electronic chart sheet coverage of the same scale, and D1 to D7 are seven large-scale electronic chart sheet coverage of the same scale), and calculates seven electronic chart sheet lists C1C3C4D1D2D5D6 containing the track report points and having two scales shown in fig. 5.
In step S211, the cloud server calculates the total cost of the seven electronic chart sheet lists C1C3C4D1D2D5D6 with two scales as shown in fig. 5 generated in the above steps according to the price of the electronic chart sheet recorded by the electronic chart maintenance terminal, generates a payment list, and pushes the payment list to the ship manager.
In step S212, the ship manager accesses the cloud server through the internet to confirm the ship' S voyage trajectory and the map list, confirms the charge list, and pays the fee.
It should be understood that the above description of the preferred embodiments is given for clarity and not for any purpose of limitation, and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. Electronic chart postpaid system based on big dipper short message, its characterized in that: the system comprises a Beidou satellite, a Beidou commander, a Beidou communication management server, a cloud server, an electronic chart maintenance terminal, at least one shipborne Beidou navigation tracking terminal and at least one user terminal, wherein each shipborne Beidou navigation tracking terminal corresponds to a terminal number;
the shipborne Beidou navigation tracking terminal is used for acquiring, storing and processing real-time ship position data of a ship, packaging the real-time ship position data into a Beidou short message, sending the Beidou short message to the Beidou satellite together with a terminal number, and receiving and confirming the Beidou short message;
the Beidou satellite is used for receiving the Beidou short message and the terminal number and transmitting the Beidou short message and the terminal number to the Beidou commander;
the Beidou commander is used for receiving and forwarding the Beidou short message and the terminal number to the Beidou communication management server;
the Beidou communication management server is connected with the Beidou commander, receives and analyzes the Beidou short message and the terminal number, transmits an analysis result to the cloud server, generates a confirmation Beidou short message and transmits the confirmation Beidou short message to the shipborne Beidou navigation tracking terminal;
the cloud server is used for decoding the Beidou short message to obtain and record the actual sailing track of the ship, storing the coverage information of the electronic chart data, periodically generating an electronic chart use record and a fee list and pushing the electronic chart use record and the fee list to a user side;
the electronic chart maintenance terminal is used for maintaining and managing the data coverage and price change of the paid electronic chart;
the user side is used for inquiring the number of the electronic charts and the expense list actually used by a certain voyage of the ship and confirming payment;
the method for realizing post-payment by using the electronic chart post-payment system based on the Beidou short message comprises the following steps:
step S201, a shipborne Beidou track tracking terminal obtains real-time ship position data of a ship;
step S202, comparing the real-time ship position with the previous historical ship position by the shipborne Beidou track tracking terminal, and converting the real-time ship position into a track report point if displacement occurs;
step S203, the shipborne Beidou track tracking terminal buffers the track report point to be local until the track report point is successfully transmitted to a Beidou communication management server;
step S204, the shipborne Beidou track tracking terminal encapsulates one or more track report points into a Beidou short message, and the Beidou short message and a terminal number are sent to the Beidou satellite;
step S205, the Beidou satellite receives the Beidou short message and the terminal number and transmits the Beidou short message and the terminal number to the Beidou commander;
step S206, the Beidou commander receives the Beidou short message and the terminal number and transmits the Beidou short message and the terminal number to the Beidou communication management server;
step S207, the Beidou communication management system receives and analyzes the Beidou short message and the terminal number, sends an analysis result to the cloud server, sends the analysis result to the cloud server, and sends a Beidou short message confirmation to the shipborne Beidou track tracking terminal;
step S208, the cloud server decodes the Beidou short message to obtain a track report point of the shipborne Beidou track tracking terminal, and records the track report point into a database;
step S209, the cloud server periodically detects whether one of the shipborne Beidou track tracking terminals reaches a charging period, and if so, a charging process is started;
step S210, the cloud server obtains all track report point data and electronic chart frame coverage information in a certain time period of the shipborne Beidou track tracking terminal from a database according to a charging period, and calculates to obtain all electronic chart frame lists covered by the tracks;
step S211, the cloud server calculates the total cost of the ship in the charging period according to the price of the electronic chart and the map, generates a payment list and pushes the payment list to a ship manager;
and step S212, the ship manager accesses the cloud server through the Internet to confirm the ship navigation track and the map sheet list, confirms the charging list and pays.
2. The Beidou short message based electronic chart postpaying system according to claim 1, characterized in that: the shipborne Beidou navigation tracking terminal comprises a Beidou positioning module RNSS, an information processing module and a Beidou short message communication module RDSS;
the Beidou positioning module RNSS is used for acquiring real-time ship position data of a ship and transmitting the real-time ship position data to the information processing module;
the information processing module is used for acquiring, processing and storing the real-time ship position data of the ship transmitted by the Beidou positioning module RNSS, comparing the real-time ship position with the previous historical ship position, if the real-time ship position is displaced, processing and converting the real-time ship position into a track report point, and packaging the track report point into a Beidou short message and transmitting the Beidou short message and a terminal number to the Beidou short message communication module RDSS;
the Beidou short message communication module RDSS receives the Beidou short messages and the terminal numbers transmitted by the information processing module, transmits the Beidou short messages and the terminal numbers to a Beidou satellite, and receives and confirms the Beidou short messages and transmits the Beidou short messages to the information processing module.
3. The Beidou short message based electronic chart postpaying system according to claim 2, characterized in that: the shipborne Beidou navigation tracking terminal also comprises a configuration interface and a shipborne power module, wherein the configuration interface is connected with the information processing module, and when the information processing module fails to receive the Beidou confirmation short message, ship position data corresponding to the information processing module is downloaded to the configuration interface; the marine power module supplies power for the shipborne Beidou navigation tracking terminal and provides a stable working power supply.
4. The Beidou short message based electronic chart postpaying system according to claim 3, characterized in that: the information processing module comprises an embedded processing unit and a track report point calculation and message coding unit, and the embedded processing unit is used for receiving, transmitting, processing and storing data; and the track report point calculation and message coding unit is used for processing the real-time ship position data of the ship, generating a track report point, packaging the track report point into a Beidou short message, and transmitting the Beidou short message and a terminal number to the Beidou short message communication module RDSS.
5. The Beidou short message based electronic chart postpaying system according to claim 4, characterized in that: the information processing module is an embedded computer system with a microprocessing MCU, a memory and a memorizer.
6. The Beidou short message based electronic chart post-payment system according to any one of claims 1-5, characterized in that: the real-time ship position data comprises ship navigation time, position, elevation and navigation speed and course information.
Priority Applications (1)
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| CN110314270B (en) * | 2019-04-30 | 2022-05-13 | 金脑元(武汉)医学生物科技有限公司 | Insomnia treatment system and insomnia therapeutic instrument based on cloud server |
| CN110488860A (en) * | 2019-07-15 | 2019-11-22 | 中国南方电网有限责任公司超高压输电公司天生桥局 | A kind of unmanned plane electric inspection process monitor and management of cluster system and method |
| CN112468563A (en) * | 2020-11-18 | 2021-03-09 | 西安航光卫星测控技术有限公司 | Method for synchronizing and forwarding data of super-long-distance Beidou group type cluster and public network |
| CN115102988B (en) * | 2022-06-17 | 2023-10-03 | 国能远海航运有限公司 | Ship positioning and message receiving and transmitting system and method |
| CN115830911B (en) * | 2022-11-17 | 2023-07-25 | 中远海运散货运输有限公司 | Determination method for ship position of sailing ship applied to PAYS service |
| CN117874150A (en) * | 2023-03-15 | 2024-04-12 | 广州海宁海务技术咨询有限公司 | Method for acquiring global electronic chart layered data |
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