Unfocused synthetic aperture radar processing of echogram data, Greenland, 2016

To better understand processes affecting the ice sheets and to supply boundary condition information into ice sheet models and ice thickness for other ice sheet analysis, the Center for Remote Sensing of Ice Sheets (CReSIS) has designed, developed, and deployed a near high frequency (33-37 MHz) radar depth sounder in Greenland. An uninhabited aerial vehicle (UAV), dubbed the G1XB, was modified to carry this HF sounder. This dataset contains data collected at Russell Glacier in Greenland to demonstrate the system. This product uses unfocused synthetic aperture array (SAR) processing to improve resolution in along-track. The data product format is a Mathworks MATLAB file. Files are named according to the format: Data{$image_id}_{$frame_id}.mat. The {$image_id} is a string which may be empty when it is a composite image or is of the form “img_II” where II is the 2-digit zero-padded image number always starting with 1 and incrementing from there. The frame ID is a concatenation of the segment ID and a frame number and follows the format YYYYMMDD_SS_FFF where FFF is the frame number from 000 to 999. For example, “Data_20080627_05_001.mat” contains data for a composite image from segment 05, frame 001, taken on 2008-06-27. More information can be found in “Readme.pdf”.

为更好地理解影响冰盖的相关过程，并为冰盖模型提供边界条件信息、为其他冰盖分析工作提供冰厚数据，冰盖遥感中心（Center for Remote Sensing of Ice Sheets, CReSIS）设计、开发并部署了一套应用于格陵兰岛的近高频（33~37 MHz）雷达测深仪。研究团队将一架命名为G1XB的无人飞行器（UAV）改装为该高频测深仪的搭载平台。本数据集包含在格陵兰岛罗素冰川（Russell Glacier）采集的系统验证数据。该产品采用非聚焦合成孔径阵列（SAR）处理技术，以提升沿轨方向的空间分辨率。数据产品格式为Mathworks MATLAB文件，文件名遵循以下命名规则："Data{$image_id}_{$frame_id}.mat"。其中"{$image_id}"为字符串，若为合成图像则可留空；若非空，则采用"img_II"格式，其中"II"为两位补零的图像编号，从1开始依次递增。帧ID由段ID与帧编号拼接而成，格式为"YYYYMMDD_SS_FFF"，其中"FFF"为取值范围000~999的帧编号。例如，"Data_20080627_05_001.mat"包含2008年6月27日采集的段05、帧001的合成图像数据。更多详细信息可参阅"Readme.pdf"。