Radarsat

Radarsat is a Canadian earth-observation program that uses synthetic aperture radar (SAR) to collect imagery for land and ocean monitoring. The program originated through collaboration between the Canadian government, the Canadian Space Agency (CSA), and industry partners, including MacDonald, Dettwiler and Associates (MDA). The term Radarsat can refer to the overall program as well as its individual satellites.

RADARSAT-1, the first generation, was launched in the mid-1990s and provided C-band SAR data in multiple imaging modes, including stripmap and ScanSAR. It supported mapping, resource management, ice monitoring, and disaster response, with data distributed to Canadian agencies and international users. The mission operated for many years before retirement in the following decade.

RADARSAT-2, the second generation, was launched in the late 2000s. It offered enhanced imaging capabilities, including higher resolution and polarimetric SAR modes, enabling more detailed surface characterization. RADARSAT-2 expanded applications in maritime surveillance, disaster management, environmental monitoring, forestry, agriculture, and Arctic operations. It remained in operation for an extended period under CSA management, contributing to both government programs and commercial research.

RADARSAT Constellation Mission (RCM), launched in the late 2010s, consists of three small satellites designed to provide frequent revisit times and persistent coverage. RCM continues the tradition of Canadian SAR data production for purposes such as maritime domain awareness, disaster response, Arctic monitoring, and land management. The mission emphasizes rapid data delivery and broad accessibility for Canadian agencies and international partners.

Across its generations, Radarsat data have supported civilian applications, scientific research, and policy planning, reinforcing Canada’s role in radar remote sensing and Arctic observation. Data are distributed under CSA programs in collaboration with industry partners and research institutions.