Frequency and polarization peculiarities of water surface radar cross section and brightness temperature angular dependences and their changes due to clouds and rain

In this paper the results of spatio-temporally collocated, multi-frequency, multi-polarization, microwave active-passive measurements of water surface radar and radio thermal characteristics changes due to clouds and rain are presented. The results have been obtained during the measurements carried out in quasi-field conditions from the measuring complex built in Armenia under frameworks of ISTC Projects A-872 and A-1524. The measurements were carried out at various polarizations by C-band (ArtAr-5.6), Ku-band (ArtAr-15) and Ka-band (ArtAr-37) combined scatterometric-radiometric systems developed and built by ECOSERV ROC under the framework of the above Projects. In the paper structural and operational features of the utilized systems and the whole measuring complex will be considered and discussed as well.