Ice draft and ice type derived from RADARSAT-2 satellite imagery and calibrated using Ice Profiling Sonar (IPS).
CHOIRS was a Canadian Space Agency sponsored project designed to take advantage of complementary technologies for the assessment of sea ice. The work was undertaken by ASL with contributions from the Canadian Ice Service, the National Research Council, and University of British Columbia.
ASL has a long history of providing accurate measurements of sea ice draft using its moored, upward-looking sonar (ULS) instrumentation, as well as recognized expertise in the field of remote sensing. The CHOIRS project offered an opportunity to marry these two technologies to provide a comprehensive view of sea ice, “from below” using sonar and “from above” using satellite.
Project services included :
Formosat-2 satellite image showing a large ice floe, overlaid with an ice draft profile from Ice Profiling Sonar.
In 2013 ASL was contracted through KazEcoProject LLP to provide technical expertise and equipment to collect and analyze sea ice draft, keel depth and ice velocity data in the PEARLS lease block located in the northern Caspian Sea. To complement the field-based project, high resolution Formosat-2 satellite images and Cosmo SkyMed Synthetic Aperture Radar images were combined with the Ice Profiling Sonar (IPS) and Acoustic Doppler Current Profiler (ADCP)data to describe ice floe behaviour, and to estimate the energetics associated with the larger floes.
Remote sensing services included :