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Abstract
The relationship between the instrument engineering parameters and the geophysical parameters derived from a multi-frequency microwave radiometer is considered in this paper. A model is described that simulates the performance of this type of instrument and shows how the overall accuracy of the instrument is reflected in the geophysical parameter derived. This, model includes the geometric and physical aspects of the instrument, radiometric parameters and the errors associated with the instrument antenna. Wind speed is considered as an example of a derived geophysical parameter.