Rainfall Over Land
Can only utilize scattering signature:
- Emission not really feasible; it’s there but signal is smaller (high emissivity) AND emissivity highly variable
- Less direct measure of rain
- Mainly convective & widespread stratiform
Special care to remove “false” signatures:
- Snow cover (melting snowpack), deserts
- Empirical “sceens”; decision tree approach
- Non-uniqueness of signatures
- conservative vs. aggressive screening