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Solar Irradiance Monitor-II (SIM-II)

Description

SIM-II is an improved version of SIM-I. The FOV of radiometer is 2 degree instead of 13.3 degree with the new tracking system. The temperature control is improved better than 0.3℃.

FY-3C SIM-II has two absolute radiometers, one radiometer performs normal observation, the other one is observed 1 day in a month for degradation monitor.

FY-3E SIM-II has three absolute radiometers supported for an improving monitor on ageing. A new observation mode is designed with 2 minutes period which can capture solar irradiance on each orbit 11 times.

Satellite	FY-3C , FY-3E , FY-3F
Spectral coverage	0.2～20μm
Observability of irradiance	0~1450Wm-2
Calibration accuracy	≤0.1%
Sensitivity	≤0.05Wm-2
Observation interval	≤8min

Data and Products

Satellite	Instrument	Datasets
FY-3E	SIM-II	L1 data
FY-3C	SIM-II	L1 data

Calibration and Validation

SIM-II calibration and validation