Hyperspectral data for PRISMA L1 and L2D validation over snow

This dataset has been used in the manuscript titled "Evaluation of PRISMA products over snow in the Alps and Antarctica". It contains radiance and reflectance data collected in the field at three sites: two in the Western European Alps (Torgnon and Plateau Rosa) and one in East Antarctica (Nansen Ice Shelf). Those data have been used to validate PRISMA Level 1 (L1) and Level 2 (L2D) products for different snow conditions. PRISMA is a hyperspectral satellite mission launched by the Italian Space Agency (ASI) in April 2019. The mission is designed to collect data at global scale for a variety of applications, including those related to the cryosphere. PRISMA data were acquired contemporary to both field measurements and Sentinel-2 data. Simulated Top of the Atmosphere (TOA) radiance data were then compared to L1 PRISMA and Sentinel-2 TOA radiance. Bottom Of Atmosphere (BOA) reflectance from PRISMA L2D and Sentinel-2 L2A data were then evaluated by direct comparison with field data. The dataset contains also the Mean Absolute Difference (MAD) calculated for each comparison between field and satellite data.

本数据集已应用于题为《阿尔卑斯山与南极地区PRISMA雪面产品评估》的学术手稿。该数据集包含三个野外站点采集的辐射亮度与反射率数据：两个位于西欧阿尔卑斯山（Torgnon与Plateau Rosa），另一个位于东南极洲南森冰架（Nansen Ice Shelf）。上述数据被用于验证意大利空间局（Italian Space Agency, ASI）于2019年4月发射的高光谱卫星任务PRISMA在不同雪况下的一级（Level 1, L1）与二级（Level 2, L2D）产品。该任务旨在全球范围内采集数据，服务于包括冰冻圈相关研究在内的多种应用场景。PRISMA数据与野外实测数据及Sentinel-2数据同步采集。随后，研究人员将模拟的大气层顶（Top of the Atmosphere, TOA）辐射亮度数据，分别与PRISMA L1级及Sentinel-2的大气层顶辐射亮度数据进行比对。最后，通过与野外实测数据直接对比，研究人员评估了PRISMA L2D级与Sentinel-2 L2A级数据的大气层底（Bottom Of Atmosphere, BOA）反射率。本数据集还包含了每一组野外与卫星数据比对所计算得到的平均绝对误差（Mean Absolute Difference, MAD）。