Earth Radiation Measurement-II (ERM-II)

Description

The ERM-II is a radiometer with 3 broadband channels that measure the earth-reflected solar flux and earth-emitted thermal flux over total (0.2~100μm), long (5~50μm) and short (0.2~5.0μm) wavebands.

Satellite FY-3F 
Band Short wavelength Long wavelength All wavelength
Spectral range (μm) 0.2~5.0 5.0~50 0.2~100
Radiance range 0~280Wm-2Sr-1 0~120Wm-2Sr-1 0~400Wm-2Sr-1
Calibration accuracy 1% 0.5% 0.5%
Sensitivity 0.3Wm-2Sr-1 0.2Wm-2Sr-1 0.2Wm-2Sr-1

Characteristics

Channel Spectral interval Noise Equivalent Radiance Absolute accuracy
Short-wave 0.2~4.3 µm 0.4 W⋅m-2⋅sr-1 1.5 W⋅m-2⋅sr-1
Total radiance 0.2~50 µm 0.4 W⋅m-2⋅sr-1 1.1 W⋅m-2⋅sr-1
ERM-II

ERM-II