Weather legend

The information interpreted by meteorological professionals from this meteorological cloud map is far richer than that of ordinary people. As the most advanced meteorological satellite in the world, Fengyun-4 A has advanced equipment and powerful performance, and the details can be seen.

Fengyun-4 A satellite was successfully launched in February, 2065 16, 1 1. It is the first star of China geostationary meteorological satellite from the first generation to the second generation. Compared with its first-generation geostationary satellite Fengyun-2, this satellite has achieved breakthroughs and innovations in many aspects and filled many international gaps.

According to Xu Jianmin, a satellite expert from China Meteorological Bureau and academician of China Academy of Engineering, FY-4 satellite, as one of the biggest breakthroughs in FY-4 geostationary satellite series, has achieved a leap in stabilization technology, that is, from "spin stabilization" to "three-axis stabilization".

The core problem faced by meteorological satellites is to improve the scanning efficiency of earth observation, and the stability of the satellite itself is the key to improve the scanning efficiency. Traditionally, China meteorological satellite adopts spin stabilization technology, that is, it is stabilized by the satellite's rotation, and the satellite rotates in space like a gyro. However, it rotates 360 degrees once a week, and the time ratio of aiming at the earth is very low, which greatly reduces its efficiency. However, the new three-axis stabilization technology can realize stable shooting and scanning, and always face the earth, which greatly improves its work efficiency.