A methodology for attenuation correction based on the minimization of a cost function

More recently, the use of attenuated-frequencies for airor satellite-borne radar has promoted the development of different techniques to correct for attenuation (using singleor double-frequency, singleor double-beam and singleor double-polarized radars), constraining the attenuation equation. In the case of single-frequency methodologies, most of them are based on the Surface Reference Technique (Iguchi and Meneghini, 1994; Marzoug and Amayenc, 1994; Iguchi et al., 2000) that consists on constraining the total Path Integrated Attenuation (PIA) with the surface return. This idea was implemented by Delrieu et al. (1997) in ground-based radars, using mountain returns as constraint.

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