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