I. Introduction
The future Argentinean constellation of two identical L-band SAOCOM satellites will have as strategic goals the mapping of soil moisture of the “Pampa humeda”, a 700 000 km2 land dedicated to agriculture and cattle raising, and at the same time in cooperating with the Italian X-band COSMO constellation in the management of the emergency [1]. Such systems foreseen three acquisition modes each of them with two different polarization schemes: “Dual”, DP, (HH, HV or VV, VH) and “Quad” (full polarimetric), QP, with experimental circular polarization [2]. A very wide swath of about 300 km is achieved by exploiting TOPSAR scanning [3] [4]. A summary of the performances in each mode is in Tab. I. If we combine the three modes, the two polarizations and the different incidence angles, we have a total of 24 different configurations, a few more should be added for getting the full compatibility with COSMO mission.