FY-4A and the ground application system are officially put into operation

04-05-2018Source:China Meteorological News Press

On May 1, Fengyun-4A, the first spacecraft of Chinese next-generation geostationary meteorological satellite and its ground system, were officially put into operation.

FY-4A is the first quantitative remote sensing satellite with a three-axis stabilization structure on geostationary orbit for China. Four new instruments are onboard, namely, Advanced Geosynchronous Radiation Imager (AGRI), Geosynchronous Interferometric Infrared Sounder (GIIRS), Lightning Mapping Imager (LMI) and Space Environment Package (SEP).

During the operation, FY-4A will go through in-orbit safety management. The data reception and processing of the four instruments onboard will be examined. Furthermore, FY-4A will produce images, quantitative products as well as monitoring and analysis products. The process of archiving and managing observations and satellite products will also be inspected to keep it run smoothly. In addition, the data and various products will be automatically disseminated to National Satellite Meteorological Center and Public Meteorological Service Center of China Meteorological Administration and shared through the broadcast of FY-4A, CMACast and remote sensing data website. Parts of numerical forecasting products will be sent to global users via WMO’s Global Telecommunication System.

FY-4A will operate automatically under the coordination of satellite-ground system and the payloads onboard are expected to take different modes of observation based on their own properties. AGRI gets 40 full-disk cloud atlases and 165 China region’s cloud atlases every day. GIIRS obtains a clear-sky observation of China every 15 minutes and a full-disk clear sky observation every three hours. LMI constantly exercises detection every two milliseconds and generate products every minute. SEP performs observations for 24 consecutive hours without a break.

It is informed that the overall target of this operation is to make sure that FY-4A and the ground system can operate stably and constantly in the long run. On Dec 26, 2016, the in-orbit test for FY-4A started, which had two stages, the first one is the payload testing, the second one is the verification of observation mode and product quality. After one year’s test, FY-4A completed the in-orbit test in 2017 and all the indexes meet the design requirements. (May 4)

Reporter Wan Xia

Editor Wu Peng