The reporter learned from the National Satellite Meteorological Center that today, after nearly a month of drift and business debugging, Fengyun-4 B star (hereinafter referred to as "B star") successfully succeeded Fengyun 4 A star (hereinafter referred to as "A star") , resuming operational services in geostationary orbit at 105 degrees east longitude.

After the orbital position adjustment of B satellite, the monitoring scope will move further westward, which can serve more countries co-building the “Belt and Road” and provide data support needed for weather forecasting, disaster prevention, reduction and relief, etc.

  Star B will be launched in June 2021 and previously carried out monitoring services at 133 degrees east longitude.

On February 1 this year, Star B started drifting from 133 degrees east longitude; on February 19, it was fixed at 105 degrees east longitude. After that, it underwent another half month of business debugging and resumed business services on March 5.

  Zheng Xudong, deputy director of the Operation Control Room of the National Satellite Meteorological Center, said that this business adjustment is based on the continuity of the observation of the main business position of 105 degrees east longitude, and that B star will replace A star to carry out monitoring business services in the new orbit.

Currently, Star B is in the "prime of life" stage. The satellite-ground system is operating well, and the spatial and temporal resolution can reach 1 minute and 250 meters, with better technical performance.

After the orbital position adjustment, Star B will provide stronger technical support in monitoring and warning of severe convective weather, especially the monitoring of sudden medium- and small-scale weather systems.

  It is reported that after Star B took over from Star A, Star A started drifting simultaneously on March 5.

Star A will drift from 105 degrees east longitude to 86.5 degrees east longitude and continue to carry out observations and services.

News link: Fengyun-4A star with “outstanding achievements”

  It has been used to image the image of the earth on the WeChat startup page, and has participated in the on-duty monitoring of the International Charter on Space and Major Disasters. It has also been used at various large-scale event sites and on the front line of disaster relief... Looking back at Fengyun 4A (hereinafter referred to as "A Star")'s "life" can be described as "outstanding achievements".

  As the first satellite of my country's second-generation geostationary orbit meteorological satellite, Satellite A was launched on December 11, 2016. It drifted over the equator at 105 degrees east longitude in May 2017 and has been in service for more than 7 years.

Star A is positioned as a scientific research test star, and later it is responsible for my country's geostationary orbit meteorological observation business. It is like a guardian in the night sky, always watching the earth, recording changes in the sky, and making important contributions to serving the national economy and people's livelihood and global users.

  Satellite A is equipped with payloads such as a geostationary orbit radiation imager, a geostationary orbit interferometric infrared detector, a lightning imager and a space weather monitoring instrument package. It is the first time in the world to achieve three-dimensional detection of atmospheric temperature and humidity in geostationary orbit. It is a milestone in the history of the development of world meteorological satellites. Important milestone.

  A-Star not only leads in technology, but also makes breakthroughs in the breadth and depth of weather services.

As of December 2023, the Fengyun family, represented by A Star, provides meteorological satellite data products and weather services to 129 countries and regions around the world.

In addition, more than 1,400 trainees from 92 countries around the world have received relevant technical training.

  In 2017, A-satellite released the first batch of images and data, completed on-orbit testing, and completed on-orbit delivery, marking the upgrading of China's geostationary meteorological satellite observation system.

Within four days from 17:00 on September 25 to 17:00 on September 28, the Earth picture on the WeChat startup page of the mobile phone was replaced by the first complete picture of the Earth released by NASA worldwide to the image of Star A. .

  On May 8, 2018, all national-level meteorological business platforms completed the service switch from Fengyun-2 to Fengyun-4A, marking the first time that the first test satellite was directly put into operation.

  In January 2022, Star A will officially assume the duty of the International Charter on Space and Major Disasters.

Globally, it plays an important role in the monitoring and assessment of various disasters such as typhoons, severe convection, floods, fires, volcanic eruptions, droughts, high temperatures, and ice and snow disasters.

It plays an indispensable role in supporting the United Nations Sustainable Development Goals, the Comprehensive Early Warning Initiative, and the Belt and Road Initiative for international meteorological disaster prevention, reduction, relief and services.

  (CCTV reporter Liu Lulu Gu Xingyue)