AMSR-E/AMSR2 Unified L3 Daily 12.5 km Brightness Temperatures, Sea Ice Concentration, Motion & Snow Depth Polar Grids, Version 1

The AMSR-E/AMSR2 Unified Level-3 12.5 km product provides brightness temperatures, sea ice concentration, and snow depth over sea ice for the Northern and Southern Hemisphere, as well as sea ice motion for the Arctic. This data set includes daily brightness temperature fields for channels ranging from 18.7 GHz through 89.0 GHz, daily sea ice concentration fields, and daily sea ice concentration difference fields for ascending orbits, descending orbits, and full orbit daily averages. Snow depth over sea ice is provided as a five-day running average for the Arctic and Antarctic. Sea Ice motion is provided daily for tracking ice movement over consecutive days in the Arctic. Note: This product uses the Japan Aerospace Exploration Agency (JAXA) AMSR2 Level-1R input brightness temperatures that are calibrated, or unified, across the JAXA AMSR-E and JAXA AMSR2 Level-1R products.AMSR-E/AMSR2统一化三级（Level-3）12.5千米产品可提供南北半球海冰区域的亮度温度（brightness temperatures）、海冰密集度（sea ice concentration）与海冰表面雪深数据，以及北极地区的海冰运动（sea ice motion）数据。本数据集涵盖18.7 GHz至89.0 GHz各通道的日度亮度温度场、日度海冰密集度场，以及对应升轨（ascending orbits）、降轨（descending orbits）与全轨日平均的日度海冰密集度差值场。南北极的海冰表面雪深数据以五日滑动平均（five-day running average）的形式提供。北极地区的海冰运动数据按日发布，用于追踪连续多日的海冰移动轨迹。注：本产品采用日本宇宙航空研究开发机构（JAXA）的AMSR2 Level-1R输入亮度温度数据，该数据已针对JAXA AMSR-E与JAXA AMSR2 Level-1R产品完成校准或统一化处理。