Satellite NOAA/NASA Polar Pathfinder SHEBA grids (Link to NSIDC) [NSIDC]

The data provided are subsets of the Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder (APP) 5km dataset. Please see the on-line documentation of the APP products available on the National Snow and Ice Data Center (NSIDC) web site for full descriptions of the APP products.Using the daily position of the Des Groseillers, a 21x21 pixel region centered on the ship location was extracted from the standard twice-daily APP grids for all products excluding ice motion and the surface type mask. These twice-daily subsets were then combined into individual flat-binary data files organized as arrays dimensioned as (21,21,ndays), where "ndays" equals the number of days available in the APP time series. One such array was generated for each APP product except ice motion, surface type mask, and orbit mask.

本次提供的数据为先进甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）极地探路者（Polar Pathfinder, APP）5公里数据集的子集。若需获取APP产品的完整说明，请查阅国家冰雪数据中心（National Snow and Ice Data Center, NSIDC）官方网站发布的APP产品在线文档。针对除冰运动、地表类型掩膜与轨道掩膜之外的全部APP产品，我们依据Des Groseillers号的每日船舶位置，从标准每日两次的APP格网数据中提取以该船位置为中心的21×21像素区域。随后将这些每日两次的子集数据整合为独立的扁平二进制数据文件，其数组维度定义为(21,21,ndays)，其中"ndays"代表APP时间序列中可用的总天数。除冰运动、地表类型掩膜与轨道掩膜外，每个APP产品均生成对应维度的数组。