RADARSAT1

RADARSAT-1 is a Canadian remote sensing satellite equipped with a synthetic aperture radar (SAR) instrument designed to acquire Earth imagery in all weather and lighting conditions. Launched in 1995, the mission represented a cornerstone of Canada’s space-based imaging program and was developed through a collaboration involving the Canadian Space Agency and industry partners. The satellite was built by Spar Aerospace (now part of MDA) and operated with data services provided by RADARSAT International under contract to the CSA.

The SAR on RADARSAT-1 operated in the C-band and offered imaging in multiple configurations, providing data products suitable for mapping, ice monitoring, oceanography, and environmental surveillance. Its capabilities enabled high-contrast imagery of textured surfaces, discrimination of land and water features, and monitoring of dynamic events such as sea ice movement and natural disasters. The mission contributed to scientific research, resource management, and commercial applications by delivering timely, wide-area imagery independent of clouds and daylight.

RADARSAT-1 operated in a near-polar, sun-synchronous low Earth orbit at an altitude of roughly 800 kilometers, allowing regular coverage of Canada and surrounding regions. Its data programs served government agencies, commercial customers, and international partners, helping to establish Canada as a major participant in space-based SAR remote sensing.

As the successor to RADARSAT-1, RADARSAT-2 was launched in 2007 with enhanced polarization and resolution, extending Canada’s capabilities in SAR imaging and continuing the nation's leadership in earth observation. RADARSAT-1’s legacy includes foundational data continuity, proven SAR technology, and a model for subsequent Canadian space missions.