MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km NRT

MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km Near Real Time (NRT), short name MOD29, contains the following fields: sea ice by reflectance, sea ice by reflectance pixel quality assurance (QA), ice surface temperature (IST), IST pixel QA, sea ice by IST, combined sea ice, latitudes, and longitudes in HDF-EOS format, along with corresponding metadata. Latitude and longitude geolocation fields are at 5 km resolution, while all other fields are at 1 km resolution. The sea ice algorithm uses a Normalized Difference Snow Index (NDSI) modified for sea ice to distinguish sea ice from open ocean, based on reflective and thermal characteristics.

MODIS/Terra 海冰范围5分钟L2横带1公里近实时（NRT）数据集，简称MOD29，包含以下字段：通过反射率的海冰、通过反射率像素质量保证（QA）、冰表面温度（IST）、IST像素QA、通过IST的海冰、综合海冰、纬度和经度（以HDF-EOS格式存储），以及相应的元数据。纬度和经度地理定位字段分辨率为5公里，而所有其他字段分辨率为1公里。该海冰算法采用了一种针对海冰修改的归一化差异雪指数（NDSI），用以区分海冰与开阔海洋，基于反射率和热特性。