Description:
Passive Microwave Sensors have existed for several decades, as ground-based, airborne or space-borne. They provide a wealth of information about the atmosphere, the surface, the hydrometeors (rain, ice, etc) and are invaluable for weather prediction. Modern passive microwave space-borne sensors and even planned sensors have only a limited number of channels available, totaling anywhere between 5 and 30 channels. This limited number of channels has been shown to be insufficient to solve for the illposed nature of the inversion of the geophysical state from space-borne measurements.
