Description
The ERM-I is a radiometer with 2 broadband channels that measure the earth-reflected solar flux and
earth-emitted thermal flux over total (0.2~50μm) and short (0.2~4.3μm) broad band channels in two observing modes.
The cross-track scanning mode is operated for the spatial resolution of 28km at nadir with a scanner of 2° Narrow
Field of View (NFOV), while the nadir staring mode is with a nonscanner of 120° Wide Field of View (WFOV).
| Satellite |
FY-3A ,
FY-3B ,
FY-3C
|
| Mission |
Earth radiation budget |
| Instrument type |
Tow broad-band channels radiometer |
| Scanning technique |
Scanner: Swath 2200km cross-track scanning, 151 steps |
| Non-scanner: 120 degree angle |
| Time resolution |
Scanner: a scan takes 4s |
| Non-scanner: 2 samples per second |
| Spatial resolution |
29 km (scanner) |
Characteristics
| Channel |
Spectral interval |
Noise Equivalent Radiance |
Radiometric Accuracy |
| Short-wave |
0.2~4.3 µm |
0.4 W⋅m-2⋅sr-1 |
1% |
| Total radiance |
0.2~50 µm |
0.4 W⋅m-2⋅sr-1 |
0.5% |
Data and Products
Calibration and Validation
ERM-I calibration and validation
