If in the fields of sea, land and air, full use can be made of satellites to send rescue information, distress alert positioning and user identity registration information inquiry services can be quickly implemented, and information can be accurately and reliably transmitted to related departments, which will enable those in distress to receive prompt and effective help. . This is the global satellite search and rescue system.
As people attach importance to life safety, the application of the global satellite search and rescue system is closely related and beneficial to groups and individuals. In addition to the two large groups of aviation and navigation, the number of individual users is also increasing, which in turn places severe demands on the system. In order to further meet business needs, the Beijing Ministry of Communications has successfully implemented an upgrade plan for the system and strengthened the processing capabilities of the global satellite search and rescue system. As the global satellite search and rescue system shoulders the heavy responsibility of people's lives and property, it also puts high demands on the system's hardware equipment, such as: powerful computing power, stability, and security.
The system constitutes the global satellite search and rescue system, which is an abbreviation of COSPAS/SARSAT and consists of three parts: distress beacon, satellite space segment and ground processing subsystem. The system operates using low-altitude polar or synchronous geostationary satellites and corresponding ground processing equipment.
When a user (ship, aircraft or individual) is in distress, the distress beacon can be manually or automatically activated by collision and flooding in the event of distress (the beacon can live for 48 hours after activation), emitting 121.5 MHz/243 MHz/ In the 4O6MHz distress alert signal, search and rescue satellites perform frequency conversion, storage, forwarding and other processing of distress alert signals sent from distress beacons and forward them, and 121.5 MHz of downlink signals from several data signal processors (DSPs) to the satellites. , 243MHz, 406MHz signal for real-time processing or delay processing of 406MHz signal. The location of the distressed target is received and calculated by the local user terminals (LUTs) of the ground processing subsystems throughout the world, and the beacon alarm data and statistical information are sent to the corresponding search and rescue task control center (MCC). The MCC operates in a dual master/slave configuration to collect, sort, store, and sort data sent from LUTs and other MCCs, filter false alarms, remove fuzzy values, pass X.25 packet switching, AFTN aviation dedicated communication networks, and Telex Pass FAX facsimile four interfaces, connect with international communication network, distribute alarm and positioning data to the relevant search and rescue coordination center (RCC) or search and rescue coordination point (SPOC) at the fastest speed so that the person in danger can obtain timely and effective Rescue, in order to achieve global, all-weather satellite search and rescue services for the sea, land and air.
System architecture diagram
Solution This solution involves the ground subsystem of the low-pole orbit search and rescue satellite system. It is built by Beijing's Ministry of Communications and includes two parts: satellite search and rescue local user terminal (LUT) and search and rescue mission control center (MCC).
The system was put into use since 1994, and Axis Technology has provided part of the industrial control equipment for the system. In order to further meet the business needs, the Ministry of Transport once again selected the Axion AX61400 4U 14-slot rack chassis, with the SBC82400 and SBC82631 two embedded half-length card products, successfully upgraded the system to meet the customer's large data volume. The calculation.
This system has extremely high requirements for hardware devices, and it chose a high-performance HP9000 series workstation. Using the French version of MS-DOS, with data communication software and data acquisition card, connecting satellite monitoring equipment as a signal acquisition, data acquisition and data transfer platform. Axun technology products as a DSP processor. Through HPIB's HPIB interface and satellite monitoring equipment connected to form the main control machine, with the REAHAT operating system, as the mission control center (MCC).
The AX61400 Rack Chassis has a compact and reasonable structure with three 5.25" and up to two 3.5" disk drive shelves to provide enough space for hardware devices; a 12CM ball cooling fan provides good ventilation and dust protection to maintain the system's internal temperature. , And easy to replace and clean. Supports 14-slot backplanes or ATX motherboards, and supports hot swappable redundant power supplies. SBC82400 embedded half-length card, using a fanless design, low power consumption, to meet the harsh environments such as high temperature applications. SBC82631 supports CRT/LCD (TFT/STN/DSTN), which can connect two display screens, support dual-Gigabit Ethernet interface, expand the channel of the overall network, and ensure the timely delivery of information through exceptional network speed, which makes the product more competitive. One chip.
Hardware specifications
AXIOMTEK AX61400
4U 14-Slot Rack Chassis Three 5.25" and Up to Two 3.5" Disk Drive Holders One 12CM Ball Cooler Fan (Optional) Two Thermal Sensor Fans Support 14 Slot Backplane or ATX Motherboard Supports Single PS/2 Power Supply (Support Hot swappable redundant power supply)
AXIOMTEK SBC82400
Fanless Low Power STPC Consumer II
32MB memory support CRT display support high-speed Ethernet
DiskOnChip® and CompactFlashTM
+5V only power mode
AXIOMTEK SBC82631
Supports Socket 370 Intel®/Celeron®/Pentium® VIA C3 Processors for CRT/LCD (TFT/STN/DSTN)
Supports dual Gigabit Ethernet ports
DiskOnChipTM
1 COM port, 2 USB ports dual display
System functions
1. The local user receiving terminal (LUT) tracks the search and rescue satellites and receives the distress indication beacon signals and data transmitted by the satellites;
2. Decode, calculate and give beacon identification code and position data, and at the same time, correct satellite orbit parameters in real time;
3, send beacon alarm data and statistical information to the corresponding search and rescue mission control center (MCC);
4. MCC collects, sorts, stores and sorts data sent from LUTs and other MCCs;
5. Information exchange with other MCCs within the COSPAS/SARSAT system;
6, filter false alarm, lift the fuzzy value;
7. Distribute the alarm and location data to the relevant search and rescue coordination center (RCC) or search and rescue coordination point (SPOC).
Why Axiom Products Axiom products have a long service life, and they have been outstanding in function and design. They have the features of fast processing, low power consumption, and strong stability.
The outstanding performance in this system is:
High speed, high precision: Supports Socket 370 Intel® /Celeron®/Pentium® VIA C3 processors with powerful core logic computing power.
Strong scalability: multiple communication interfaces meet the needs of the system; one COM port and two USB ports provide multiple access methods for connecting peripherals.
High-speed network access: Dual Gigabit Ethernet ports bring exceptional speeds and ensure rapid information delivery.
Reliable Communication: With Ethernet and other communication interfaces, multiple interfaces are used as backups to ensure that data can be transmitted in a timely and efficient manner.
Reliable power supply: The +5V only power supply mode enhances the stability of the power supply system.
Ultra-low power consumption: A fan-less, low-power embedded half-length card meets the requirements of low thermal energy.
Dual display: friendly management interface, support CRT/LCD (TFT/STN/DSTN)
Business Advantage AXIOMTEK is one of the key members of the Intel® Communications Alliance (ICA) and provides the best solution for network communication and embedded trial application platforms. The embedded computing transportation solution developed by AiXun Technology is a combination of high stability and standardized design, and is ideal for transportation projects and environments. As a company that has obtained ISO-9001-2000 certification, Axis' products are both high-quality management standards and meet stringent industry requirements. Axis Technology provides stable and reliable hardware platform services. The product design is compact, simple, and has extensive scalability, can be well integrated with the surrounding environment, to meet the various needs of users.
Prospects The Beijing Ministry of Communications is responsible for building our country's low-orbit search and rescue satellite system. It is understood that the equipment is responsible for a large number of low-orbit satellite surveillance and search and rescue operations. The Chinese manned spacecraft also belongs to the category of low-orbit satellites. During the previous launch experiments, the equipment successfully completed the entire process of monitoring and returning to the warehouse. Calculations play a significant role in assisting the launch and return of satellites and spacecraft.
Facts have proved that as people's economic activities increase, people pay more attention to life safety issues. In addition to the users of the two aviation and navigation systems, personal distress assistance has also become one of the main targets of the global satellite search and rescue system services. System usage. Among them, the government's key departments, military agencies, high-tech fields, the country's important economic sectors, sports exploration and large companies are the main high-level people.
At present, the system has applied AXIOMTEK products. Its excellent hardware performance provides reliable hardware protection for people's lives and property.
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Alarm release mainly uses standard equipment such as audio alarms. During wartime, communication, broadcasting, and television systems must prioritize the transmission and issuance of air defense alarm signals, and auxiliary means such as sirens, horns, and gongs can also be used. The sound alarm must be set at the designated location, and the alarm facilities must be maintained in good working condition. The release and transmission of alarms should be fast and accurate, and multiple means should be used simultaneously; Strengthen communication and liaison with superiors, subordinates, and neighbors, receive air raid intelligence information at any time, strengthen observation of air targets, and promptly report air raid intelligence; According to the situation and duration of the air raid, timely release the warning signal. With the sudden increase of air raids, the increase of attack methods, and the expansion of destruction, the importance of air defense alerts is increasingly being valued. The accuracy, timeliness, and continuous issuance ability of air defense alerts are required to be higher. The issuance methods of air defense alerts will also become more flexible and diverse with the construction and improvement of communication and network.
Early Warning System, Control Devices, Electronic Sirens, Natural Disaster Warning System, Alarm System
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