ATLAS/ICESat-2 L3A Sea Ice Height Quick Look, Version 5

ATL07QL is the quick look version of ATL07. Once final ATL07 files are available the corresponding ATL07QL files will be removed.
ATL07 contains along-track heights for sea ice and open water leads (at varying length scales) relative to the WGS84 ellipsoid (ITRF2014 reference frame) after adjustment for geoidal and tidal variations, and inverted barometer effects. Height statistics and apparent reflectance are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.

ATL07QL是ATL07的快速查看版本（quick look version）。一旦最终版ATL07文件发布，对应的ATL07QL文件将被移除。
ATL07包含沿轨高程（along-track heights）数据，覆盖海冰及不同长度尺度的开阔水道（open water leads）；这些数据已校正大地水准面变化、潮汐变化及倒气压计效应（inverted barometer effects），且相对于WGS84椭球（WGS84 ellipsoid）（采用ITRF2014参考框架，ITRF2014 reference frame）。此外，数据集还提供高程统计信息与表观反射率（apparent reflectance）数据。该数据由冰、云和陆地高程卫星-2（ICESat-2）观测平台搭载的高级地形激光高度计系统（Advanced Topographic Laser Altimeter System，ATLAS）仪器获取。