China News Online, July 5th, title: 3 domestic and international firsts, this Fengyun-3 star is extraordinary
Author Zheng Yingying, Ma Shuaisha, Guo Chaokai
The "Dawn Star" Fengyun-3 E satellite was launched at the Jiuquan Satellite Launch Center on the 5th. The satellite was developed by the Eighth Research Institute of China Aerospace Science and Technology Corporation. The fifth satellite.
The world's first civil twilight orbiting meteorological satellite
FY-3E is the first twilight orbit satellite in the Fengyun satellite family and the first civil twilight orbit satellite in the world meteorological satellite family.
The World Meteorological Organization proposed the concept of establishing a network of three satellites in the morning, afternoon, and twilight orbits in the "Global Observing System Outlook in 2025".
The successful launch of the FY-3 E satellite will make up for the shortcomings of the satellite observation orbit (5:30 in the morning and 17:30 in the evening) and the lack of observational data, effectively supplementing the gap of the satellite observation data in the assimilation window of the 6-hour numerical weather prediction model .
China's first dual-frequency dual-polarized wind field measurement radar
The sea surface wind field is an important physical parameter of the air-sea interaction interface, which plays a very important role in global climate regulation, and has an important impact on the development of marine navigation, marine fishing operations, and marine engineering activities.
Traditional on-site observation methods such as ships, sea buoys, and coastal ocean observatories are not only costly, but also because of the vast ocean area, continuity in time and space cannot be guaranteed.
The Fengyun-3 E satellite is equipped with "China's first dual-frequency dual-polarized wind field measurement radar". It obtains global ocean surface wind field information through sea surface backscatter measurement, and through on-board internal calibration and external active equipment on orbit. The calibration realizes the high-precision, large-dynamic, and high-resolution measurement of the sea surface wind field, and measures the physical properties of the surface such as sea ice, soil moisture, and vegetation.
Fengyun-3 E-star development scene by Chen Jun
China's first "omni-energy spectrum" solar observation
Solar radiation is the source of surface energy. As the global climate evolves, the changing characteristics of solar radiation and the possible climatic effects have also attracted the attention of the scientific community.
Taking full advantage of the twilight orbit, the sun can be continuously observed for a long time.
This time, Fengyun-3 E star is equipped with three different loads: solar irradiance spectrometer, solar X-EUV imager, and solar radiation monitor (international comparison type) to carry out solar observations, respectively from spectrum, imaging, total radiation, etc. Simultaneous observations of the sun from different sides will provide scientists with more comprehensive information on the causes and driving forces of changes in the Earth’s climate and weather.
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