Micro-Wave Radiation Imager-II (MWRI-II)
Description
Succeeding the channel settings of MWRI-I, MWRI-II has enhanced observation abilities with additional channels and improvements in calibration accuracy, observation sensitivity, positioning accuracy and operational lifetime.
| Satellite | FY-3F , FY-3H |
|---|---|
| No. Channels | 22 |
| Dynamic range | 3～340K |
| Main-beam efficiency | ≥95% |
| Channel registration | ≤2km (0.5km expected) |
| Swath width | ≥1400km |
| Scan cycle | three modes: 1.7s, 1.8s, 2.0s |
| Scan error | 1ms (continuous in 30 minutes) |
Characteristics
| Center frequency (GHz) | Polarization | Bandwidth (MHz) | Frequency stability (MHz) | Sensitivity (K) | Minimum/expected accuracy (K) |
|---|---|---|---|---|---|
| 10.65 | V，H | 180 | 10 | 0.5 | 0.8 / 0.8 |
| 18.7 | V，H | 200 | 10 | 0.5 | 0.8 / 0.8 |
| 23.8 | V，H | 400 | 15 | 0.5 | 0.8 / 0.8 |
| 36.5 | V，H | 900 | 20 | 0.5 | 0.8 / 0.8 |
| 50.30 | V，H | 400 | 25 | 0.5 | 0.8 / 0.8 |
| 52.61 | V，H | 400 | 25 | 0.5 | 0.8 / 0.8 |
| 53.24 | V，H | 400 | 25 | 0.5 | 0.8 / 0.8 |
| 53.75 | V，H | 400 | 25 | 0.5 | 0.8 / 0.8 |
| 89.0 | V，H | 3000 | 25 | 0.5 | 0.9 / 0.8 |
| 118.7503±3.2 | V | 2×500 | 25 | 0.8 | 1.2 / 0.8 |
| 118.7503±2.1 | V | 2×400 | 25 | 0.8 | 1.2 / 0.8 |
| 118.7503±1.4 | V | 2×400 | 25 | 0.8 | 1.2 / 0.8 |
| 118.7503±1.2 | V | 2×400 | 25 | 0.8 | 1.2 / 0.8 |
Calibration and Validation
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MWRI-II