THE FIRST IMAGES FROM FY-4A

Release Date:Feb. 27, 2017

The First Color Composite Image of FY-4A

The first color composite image of AGRI, FY-4A. (05:15 UTC Feb. 20, 2017)

The 14 Bands Images of AGRI

The 14 bands images of AGRI, FY-4A. (05:15 UTC Feb. 20, 2017)

The First Color Composite Animation of FY-4A

Tibetan Plateau

Tibetan plateau. (05:15 UTC Feb. 20, 2017)

Water Vapour Over East China

Water vapour over East China. (05:50 UTC Feb. 21, 2017)

Snow Cover of North China

Snow cover of North China.(02:00 UTC Feb. 23, 2017)

Frontal Surface Over Eastern Asia

Frontal surface over eastern Asia. (05:15 UTC Feb. 20, 2017)

Tropical Convection Over Indian Ocean

Tropical convection over Indian Ocean. (05:15 UTC Feb. 20, 2017)

Cyclone Over Australia

Cyclone over Australia. (05:15 UTC Feb. 20, 2017)

Antarctic Vortex

Antarctic vortex. (05:15 UTC Feb. 20, 2017)

Haze Over Bengal Bay

Haze over Bengal bay. (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.

LWIR radiance (700-1130 cm-1, 8.85-14.29 μm), UTC 2017-02-20 10:00.

MWIR radiance (1650-2250 cm-1, 4.44-6.06 μm), UTC 2017-02-20 10:00.

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.

An Example of Lightning Events in Thunderstorm Over Western Australia Captured by LMI

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Lightning Events Distribution Image

Lightning event distribution image. (Feb. 13, 2017)

Electron Flux

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”.

Deep Charging

A group of deep charging events recorded by deep charging detector made with the frequently-used material of circuit-board. Each event correspond to the enhancement of energetic electrons. The data could be used in evaluation of deep charging effect on sensitive parts onboard FY-4A.

Surface Charging

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.

Radiation Dose

Ionization dose level in different position of FY-4A detected by dosimeters. The data will be used in the radiation damage level assessment.