Release Date：Feb. 27, 2017
The first color composite image of AGRI, FY-4A. (05:15 UTC Feb. 20, 2017)
The 14 bands images of AGRI, FY-4A. (05:15 UTC Feb. 20, 2017)
Tropical convection over Indian Ocean. (05:15 UTC Feb. 20, 2017)
The GIIRS scanning is performed in step-and-stare mode, and the instrument stares for a dwell-time of at least 2.6 seconds over the same Earth location. A number of interferograms are acquired by a long wave (LWIR: 700-1130cm-1) and a mid wave (MWIR: 1650-2250cm-1) two-dimensional detector arrays (32×4 samples, IFOV@Nadir:16km) during the dwell time. After one stare is completed the instrument pointing is shifted to the next Field-of-View position. The GIIRS is able to scan the full earth disc within about 2 hours, and a total of about 1530 views are needed.
The GIIRS radiance measurements in LWIR and MWIR at four samples are shown. Sample A indicates the relatively warm and humid clear atmosphere. Sample B and D represent the dry and cold atmosphere at high latitudes. Sample C shows the typical cloudy sky.
The evolution of electron flux of 200-300keV (upper), >1.5MeV (middle) by energetic electron detectors together with Dst index (bottom), revealing the fact that geomagnetic disturbance induce electron acceleration which supports the prediction of “killer electron”.
A differential charging event recorded by differential charging potential sensor (DCPS) (bottom) and the corresponding evolution of spectrum of ion (upper) and electron (middle) by absolute charging potential sensor (ACPS). The data could be applied in warning of dangerous discharging events.