Lessons Learnt from HY-2B RFI Activities and Preliminary Studies on RFI Detection and Localization for the Chinese Ocean Salinity Satellite

Abstract

Distributed from L to high frequency band, Radio frequency interferences (RFIs) are contaminating the geophysical parameters estimated from the measurements of microwave radiometers. Chinese researchers are developing series of Earth observation satellites focusing on the marine dynamic environment for numerical weather prediction and climate monitoring. The scanning microwave radiometer onboard HY-2B (Haiyang-2B) has been monitoring sea surface temperature observations since 2018. After more than 2 years in orbit, an overview of RFI scenario worldwide has been provided and lessons have been learnt from HY-2B RFI activities. The Interferometric Microwave Radiometer (IMR) will be a main payload onboard the Chinese Ocean Salinity Satellite. Preliminary studies have been carried out on RFI detection and localization to improve the performance of this mission.