AbstractsPhysics

Radar signals at 3.2 cm are corrected electronically for rain attenuation before being displayed on a scale of grey. The correction is computed by integration of tile signals in a feed-back loop. The use of logarithmic and antilogarithmic devices makes it possible to apply the proper power law relationships. Corrected grey scale CAPPI records have been obtained. The signal from heavy cores is enhanced although the total area on the display remains that of the original attenuated signal. Subsequent analysis of the system, based on previous theoretical work, led to a new adjustment method. At 5.7 cm correction for rain attenuation is not recommended because the uncertainties in interpretation of radar signals are at least of the same order of magnitude as the errors due to attenuation.