Fengyun-4 a satellite has been delivered and used, and the onboard instruments have reached the international advanced level
Abstract: the application of meteorological satellites not only includes the well-known weather forecast, but also provides first-hand data for disaster prevention and mitigation, environmental monitoring, energy detection and other fields by providing cloud products, radiation products, sea products, lightning products and other products
the delivery ceremony of fengyun-4 a satellite independently developed by China was held on September 25. It is reported that fengyun-4a satellite, as the first scientific research and test satellite of China's new generation geostationary meteorological satellite, has achieved many technological breakthroughs. Experts said that the development of the whole fengyun-4a satellite is difficult and technically complex, reaching the international advanced level
fengyun-4a satellite is China's first three-axis stable quantitative remote sensing satellite in geostationary orbit. It was successfully launched on December 11, 2016. After the successful completion of the first phase of in orbit testing, an in orbit delivery ceremony was held on December 25. According to Dong Yaohai, chief engineer of fengyun-4 satellite system, the meteorological satellite has made many breakthroughs in the technical field, Leading the world level: "this satellite is the first interferometer in the world (dry atmospheric vertical detection. Chinese enterprises are talented, and some places will become stress concentration areas. They can independently find their own plastic extrusion machinery tester) The United States has not achieved the instrument installed with the detector, but China has achieved it; Second, our 36000 km pointing accuracy is km, which is a powerful technology in the world; Third, our four types of instruments are well controlled and have excellent performance. "
the four instruments carried on fy-4a are multi-channel scanning imaging radiometer, interferometric atmospheric vertical detector, lightning imager and space weather instrument package. According to Ding Lei, deputy director and researcher of the Shanghai Institute of technology and physics of the Chinese Academy of Sciences, these instruments are domestically developed and belong to the first flight on the satellite in China; In particular, the dry air vertical detector is the first to be loaded on a geostationary satellite in the world. Ding Lei said: "This is our first dry atmospheric vertical detector that can work in geostationary orbit in the world. There is no precedent in the world to use it in such a high orbit, which should be said to be more than five years earlier than the plan of Europe and the United States. In fact, for our instrument and the payload of our Fengyun satellite, there is a very obvious feature: it is all done by our country. From basic scientific research, to detection instruments and The innovation chain from the core components to the whole system integration is completed in China. This technology chain also ensures that Fengyun satellite can stand and make a noise in the world. "
fy-4a satellite was first made into a color satellite cloud image during the test period, and a regional observation image was generated as soon as 1 minute. Zhang Zhiqing, chief engineer of fengyun-4 ground application system, said that compared with the limitation of Fengyun-2's single visible light channel, the imager on fengyun-4 a satellite has 14 channels, which helps to improve the accuracy of weather forecasting. Zhang Zhiqing said, "for example, when we used Fengyun-2 to look at the cloud map for weather analysis of the rainstorm in the south this year, only our experts can clearly see where they think there are water clouds, ice clouds, or various cloud orientations. This requires a very professional and very high level (see to understand) 。 But now, there are more Fengyun 4 channels, which are dedicated to watching ice clouds and water clouds. The transformation of ice clouds and water clouds is about to rain, so this transformation process can be provided very clearly, which will also increase our application ability. "
in fact, the application of meteorological satellite not only includes the weather forecast with lower resistance than foreign products, but also provides first-hand data for disaster prevention and mitigation, environmental monitoring, energy detection and other fields by providing cloud products, radiation products, sea products, lightning products and other products. It is reported that the service of fengyun-4a star will extend to the "the Belt and Road" in the future. China will provide corresponding equipment and technical support to Sri Lanka, Pakistan, Bangladesh and other countries through cooperation
in the next step, the China Meteorological Administration will strengthen the research and development of satellite data products and pay attention to: generally, for objects after 20kg, the breaking point ratio can be adjusted to 80 to meet the breaking requirements. The smaller the breaking point ratio, the larger the breaking value grabbed by the sensor, the larger the breaking point ratio, and the smaller the value grabbed by the sensor, so as to promote the "fengyun-4" a satellite to greatly improve China's weather forecast, meteorological disaster prevention and mitigation, coping with climate change Ecological environment monitoring and space weather monitoring and early warning capabilities are widely used in the fields of meteorology, water conservancy, agriculture, forestry, environment, energy, aviation and marine, especially in serving the implementation of China's military civilian integration strategy and the construction of the "the Belt and Road". At present, the "fengyun-4" a satellite has been included in the global earth observation meteorological satellite sequence by the World Meteorological Organization, and its data has been shared globally. It is expected to have business operation and real-time service capabilities by the end of 2017, which will provide support for disaster prevention and mitigation and economic and social development in China and the Asia Pacific region