Abstract
The European Space Agency's Soil Moisture and Ocean Salinity (SMOS) mission operates in the 1400-1427MHz frequency band, which is allocated to the EESS(passive) service in the ITU Radio-Regulations. The measurements of SMOS radiometer are perturbed by radio frequency interferences (RFIs) that jeopardize part of its scientific retrieval in certain areas of the World. This paper summarizes the strategies initiated by the European Space Agency to mitigate the impact of RFIs, and in particular the collaboration established with national telecommunication Authorities for the investigation of interference cases and switching-off the unauthorised RFI sources. The RFI detection, monitoring and reporting process is described in more detail, focused on the tasks carried out by the SMOS Operations team at ESAC, the ESA centre located near Madrid. The RFI tools developed and the planned evolution are also presented.
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