Accumulated precipitation* | 1 - primary | No specific limitation. | MW channels in 54 and 183 GHz bands. Frequent sampling (GEO) is essential for accumulated precipitation |
Atmospheric temperature* | 1 - primary | Coarse vertical resolution. | Many MW channels in the 54 GHz band. Nearly all-weather sounding. Frequent sampling (GEO) enables monitoring instability onset |
Cloud ice | 3 - high | No specific limitation. | MW channels in 54 and 183 GHz bands. Frequent sampling (GEO) enables growth monitoring |
Cloud ice Total Column | 3 - high | No specific limitation. | MW channels in 54 and 183 GHz bands. Frequent sampling (GEO) enables growth monitoring |
Cloud ice effective radius | 2 - very high | No specific limitation. | MW channels in bands 54 and 183 GHz. Frequent sampling (GEO) enables growth monitoring |
Cloud liquid water (CLW) | 2 - very high | No specific limitation. | MW channels in bands 54 and 183 GHz. Frequent sampling (GEO) enables growth monitoring |
Cloud liquid water (CLW) total column | 2 - very high | No specific limitation. | MW channels in bands 54 and 183 GHz. Frequent sampling (GEO) enables growth monitoring |
Downward long-wave irradiance at Earth surface | 5 - marginal | Highly indirect. | MW channels in bands 54 and 183 GHz to account for downward cloud radiation |
Freezing level height in clouds | 3 - high | No specific limitation. | MW channels in the 54 GHz band. Inference from the temperature profile |
Melting layer depth in clouds | 3 - high | No specific limitation. | MW channels in the 54 GHz band. Inference from the temperature profile |
Precipitation intensity at surface (liquid or solid)* | 1 - primary | No specific limitation. | MW channels in the 54 and 183 GHz bands. Suitable for solid and liquid precipitation over sea and land, Insensitive to surface emissivity. Frequent sampling (GEO) consistent with precipitation temporal variability |
Specific humidity* | 2 - very high | Coarse vertical resolution. | MW channels in the 183 GHz band, and 54 GHz for temperature and liquid water corrections. Frequent sampling (GEO) enables monitoring instability onset |
Integrated Water Vapour (IWV) | 2 - very high | No specific limitation. | MW channels in the water vapour band around 183 GHz |
Upward long-wave irradiance at Earth surface | 5 - marginal | Highly indirect. | MW channels is the 54 and 183 GHz bands to infer the impact of clouds on the upward LW radiation |
Cloud drop effective radius | 5 - marginal | Highly indirect. | MW channels in 54 and 183 GHz bands. Frequent sampling (GEO) enables growth monitoring |