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NASA Operation IceBridge's gridded Surface Elevation product is derived from Airborne Topographic Mapper (ATM) lidar data collected during annual low-altitude surveys over Arctic sea ice from March 2009 to May 2018. The data are processed into a specialized grid with a 30-meter along-track dimension to optimize the non-uniform sampling density of the conical lidar scanner. This dataset provides high-resolution elevation measurements for studying sea ice topography and change.
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