Greenhouse-gases Absorption Spectrometer (GAS)
Description
Greenhouse-gases Absorption Spectrometer has two scanning modes: nadir or pointing to sunglint.
| Satellite | FY-3D |
|---|---|
| Number of Channels | 4 (2 NIR, 2 SWIR) |
| Purpose | CO2, CH4, CO, N2O |
| Spatial Resolution | 10km |
Nadir mode
Glint Mode
Characteristics
| Channel | Spectral range | Spectral resolution | SNR |
|---|---|---|---|
| 0.75~0.77 μm | 13000~13300 cm-1 | 0.60 cm-1 | >300 |
| 1.56~1.72 μm | 5800~6400 cm-1 | 0.27 cm-1 | >300 |
| 1.92~2.08 μm | 4800~5200 cm-1 | 0.60 cm-1 | >300 |
| 2.20~2.38 μm | 4200~4550 cm-1 | 0.60 cm-1 | >300 |
Data and Products
| Satellite | Instrument | Datasets |
|---|---|---|
| FY-3D | GAS | L1 data |
Calibration and Validation
GAS