SAOCOM is Argentina’s managed L-band radar Earth-observation effort, spanning spacecraft development, ground operations, data products and applications. Its first constellation consists of the similar SAOCOM 1A and 1B spacecraft, launched in 2018 and 2020, with contributions from CONAE, INVAP, VENG and CNEA. A second constellation is intended to incorporate advances from that experience. The programme’s central applications include soil-moisture measurement, flood monitoring and detection of marine oil spills. Through cooperation with the Italian Space Agency, SAOCOM complements COSMO-SkyMed in the Italian–Argentine SIASGE emergency-management system. Instrument resolution and swath depend on acquisition mode; orbital repetition and achievable revisit are distinct measures.