How many satellites has China launched now?

1. Dongfanghong-4 Platform/Xinnuo-2 Satellite: Xinnuo-2 Satellite mainly serves communication and broadcasting users in Chinese mainland, Hong Kong, Macao and Taiwan. The satellite adopts the public platform of a new generation of large-scale geostationary satellites being developed in China, namely the Dongfanghong-4 satellite platform, and carries 22 Ku-band high-power transponders. At the end of the satellite life, the output power is 10500W, the launch weight is 5 100kg (Dongfanghong-3 is a medium-capacity communication satellite, which can carry 200 kg payload, and the whole satellite power is 1800 W, which can carry 24-way lieutenant colonel power transponders), and the design life is 15 years. Launched by xichang satellite launch center on the Long March CZ-3B carrier rocket, the whole satellite index and capability reached the international advanced level. The platform is composed of power supply, measurement and control, data management, attitude and orbit control, propulsion, structure and mechanism, thermal control and other subsystems, with a full three-axis stable control mode. The total output power of the platform is 8000- 10000 watts, which can be extended to more than 10000 watts and can provide about 6000-8000 watts for the payload. The platform can carry 600-800 kilograms of payload, and the maximum launching weight of the whole satellite can reach 5200 kilograms. It can be launched by launch vehicles such as Long March 3B, Ariane and Proton. The design life of the platform is 15 years. 2. Beidou Navigation Test Satellite (Beidou): The Beidou Navigation Test Satellite was developed by China Association for Science and Technology, and will establish its own first-generation satellite navigation and positioning system-"Beidou Navigation System". Beidou Navigation System is a regional navigation system that provides satellite navigation information all day. After the system is completed, it will mainly provide navigation services for highway transportation, railway transportation, offshore operations and other fields, and will play a positive role in promoting China's national economic construction. The first successful launch of Beidou navigation test satellite laid the foundation for the construction of Beidou navigation system. The Beidou Navigation Test Satellite was launched by the Long March 3A carrier rocket. This launch is the 63rd flight of China Long March series launch vehicles. 3. Zhongxing -22: "Zhongxing -22" is a practical geosynchronous communication satellite and the follow-up star of "Dongfanghong III". The satellite, with a mass of 2.3 tons and a designed service life of 8 years, is mainly used for ground communication services and operated by China Communication Broadcasting Satellite Company. It is understood that after the satellite enters the transfer orbit, it will be fixed above the equator at 98 degrees east longitude under the tracking control of the An Satellite Measurement and Control Center and the space ocean survey ship. 4.FY-2: FY-2 satellite is a cylinder with a diameter of 2.1.6m and a height of1.6m. Including the antenna, the total height of the satellite is 3. 1 m and it weighs about 600kg. The attitude of the satellite is spin-stable, and the spin speed is 100 1 rpm. The satellite is equipped with multi-channel scanning radiometer and cloud image forwarding, which can obtain visible light cloud images, day and night infrared and water vapor cloud images. Broadcast and develop wide digital images, low-resolution cloud images and S-band weather maps: obtain observation data from meteorological, marine and hydrological data collection platforms; Collect space environmental monitoring data. The satellite works over the equator of east longitude105, and its position keeping accuracy is 0.5 from east to west and 0/from north to south. Fengyun-2 satellite was jointly developed by China Association for Science and Technology and Shanghai Space Administration. CAST is responsible for satellite control, propulsion, forwarding, antenna, measurement and control and some structural subsystems. 1At 20: 00 on June 1997, Fengyun-2 satellite was launched by cz-3. Under the measurement and control management of satellite ground measurement and control station and Wangyuan No.2 survey ship, the satellite has completed the separation of satellite and arrow, satellite rotation and so on. Fengyun-2 satellite inherited the spin stabilization mode of Dongfanghong-2 satellite, and adopted some new technologies such as multi-channel scanning radiometer, three-channel microwave transmission and nutation control. The main performance indexes of this satellite have reached the level of similar geostationary meteorological satellites in the early 1990s. Fengyun-2 meteorological satellite is a combination of space technology, remote sensing technology, communication technology and computer technology. It provides directional coverage and continuous remote sensing of the distribution of the earth's surface and atmosphere, and has the advantages of strong real-time, high time resolution, objectivity and vividness. 5. FY- 1: A series of polar-orbiting meteorological satellites in China. Three satellites, FY- 1A, 1B and 1C, were launched. FY- 1A and 1B were launched in September 1988 and September 1990 respectively. They are experimental meteorological satellites. The remote sensors carried by these two satellites have good imaging performance, and the experimental data and operational experience obtained provide meaningful data for the development and management of subsequent satellites. FY-/KOOC-0/C was launched on/KOOC-0/May, 1999/KOOC-0/0, and operated in a sun-synchronous polar orbit of 90/KOOC-0/km, with a design life of 3 years. The main remote sensor of the satellite is a very high resolution visible-infrared scanner. The number of channels is increased from 5 FY- 1A/B to 10, and the resolution is 1 100 meters. Remote sensing data obtained by satellites are mainly used for weather forecasting and environmental monitoring such as vegetation, snow and ice cover, floods and forest fires. 6. Dongfanghong-1 satellite (DFH- 1): 1970 was successfully launched at Dongfeng Range, Jiuquan, Gansu at 2 1 35 on April 24th, which opened a new era in China's space history and made China become the spin stabilization mode after the Soviet Union, the United States and satellites. The electronic tone generator is the core part of the whole satellite, which repeatedly plays the first eight bars of the music "Dongfanghong" to the ground through the 20MHz short wave transmission system. 7. Dongfanghong II (DFH-2):1successfully launched for the first time on April 8, 984. * * * Developed and launched three Dongfanghong-2 satellites. The development and launch of every three satellites took nearly 1970 years. The successful launch of "Dongfanghong II" started the history of satellite communication with our own communication satellite. 8. Dongfanghong -2A: Dongfanghong -2A is a modified satellite of Dongfanghong-2 satellite, and its pre-research work began at 1980. The first Dongfanghong -2A satellite was successfully launched on1March 7th, 988. Soon after, the second and third satellites were successfully launched. They are fixed at 87.5 east longitude, 1 10.5 and 98 respectively. The fourth star failed to enter the scheduled orbit due to the third stage failure of the launch vehicle. Over the past few years, the three satellites have worked well, reaching the design and use targets, and played a great role in China's TV transmission, satellite communication and foreign broadcasting. 9. Dongfanghong-3 Satellite (DFH-3) Dongfanghong-3 is a new generation communication satellite in China, which is mainly used for TV transmission, telephone, telegraph, fax, broadcasting and data transmission. There are 24 C-band transponders on board, six of which are medium-power transponders. Other 18 channels are low-power repeaters. Service areas include: Chinese mainland, Hainan, Taiwan Province Province and offshore islands. Eirp≥37 dbw for medium power channel and 33.5 dbw for low power channel. During the shadow period, all transponders are working. The output power of the satellite at the end of its life is ≥ 1700W: the allowable payload mass of the satellite reaches 170kg. The satellite works in the geostationary orbit, and its position accuracy is 0. 1 in the east-west and north-south directions. The antenna pointing error in pitch and roll directions is 0.65438 0.5, and the error in yaw direction is 0.5. The working life of the satellite is 8 years, and the single satellite reliability at the end of its life is 0.66. Satellites can be docked with various launch vehicles (ZC-3A, Ariane -4, etc.). ), the satellite platform adopts the general platform of geostationary orbit satellite (basic type), which can be used for a variety of medium-sized applications. Dongfanghong-3 satellite has the advanced level of international similar satellites (medium capacity). 10. Shi Jian-1 satellite (SJ- 1) is a scientific exploration and technical test satellite. 1March 3, 977, 1 1 launched into orbit in May. Shijian-1 is a spin-stabilized satellite, and its successful launch took less than 10 months. 1 1.ZY- 1 earth resources satellite is the first generation of transmission earth resources satellite in China. 1988, the governments of China and Brazil signed a protocol and decided to jointly develop China-Brazil Earth Resources Satellite (CBERS) on the basis of Resource-1 satellite. Resources 1 are mainly used to monitor the change of land resources; Estimate forest stock and crop growth, quickly identify the estimated losses of floods and earthquakes, and put forward countermeasures; Provide dynamic information on coastal economic development, beach utilization, aquaculture and environmental pollution; At the same time, explore underground resources, so that they can be rationally developed and utilized. Resource-1 satellite weighs 1450 kg and has a life span of two years. The orbit is synchronized with the sun, with an altitude of 778 kilometers and an inclination of 98.5 degrees. The orbital period is 100.26min, and the regression period is 26 days. The local time of the downlink node is 1 1:20. The satellite is a cuboid with a single-wing solar panel. The satellite adopts three-axis stable attitude control mode and S-band and ultrashort wave measurement and control system. The resource-1 satellite was successfully launched by the Long March 4B carrier rocket in1June+1April/October, 1999. 12. China-Pakistan Earth Resources Satellite (CBERS): Based on the original scheme of China Resources No.1, China and Pakistan jointly invested to jointly develop China-Pakistan Earth Resources Satellite (CBERS). It is also stipulated that after the China-Pakistan Earth Resources Satellite is put into operation, it will be jointly used by the two countries. Resource-1 satellite is the first generation satellite to transmit earth resources in China. The three kinds of remote sensing cameras on board can observe the earth day and night, and the collected data are transmitted back to the earth ground receiving station by high-rate data transmission system, and processed into pictures needed by various users. Because of its multi-spectral observation, wide range of earth observation and fast data collection, it is especially beneficial to the dynamic and rapid observation of surface information. Because the satellite has the characteristics of multi-spectral observation, wide observation range of the earth, fast data acquisition and macroscopic intuition, it is especially beneficial to dynamically and quickly observe the earth's ground information. The main uses of the satellite in China's national economy are: its image products can be used to monitor the changes of land resources and update the national utilization map every year; Calculate the cultivated land area, estimate the forest stock, crop growth, yield and grassland stock and their annual changes; Monitoring natural and man-made disasters; Quickly identify damages such as floods, earthquakes, forest fires and sandstorms, estimate losses and put forward countermeasures; Provide dynamic information on coastal economic development, beach utilization, aquaculture and environmental pollution; At the same time, explore underground resources, delineate resource areas such as gold, oil, coal and building materials, and supervise the rational development of resources.