Spectrometer measurements of snow and bare ground targets and simultaneous measurements of snow conditions

The dataset holds measurements of reflected sunlight spectrum from snow and different snow free targets (moss, lichen, rock surface, ground vegetation). The purpose of the measurements has been to create a dataset to better understand the effect of snow cover characteristics and different bare ground targets on reflected sunlight, and to relate this information to observed at satellite reflectances from snow covered and partially snow covered boreal forests. The instrument in the measurements was Field Spec Pro JR from Analytical Spectral Devices Inc. Additionally to the 237 bands measured between 350-2500 nm, the dataset contains the following parameters from the measurement sites: id, location, time of measurement, target type (snow, bare ground etc.), cloudiness (in octas), snow depth (cm), snow temperature at 5 cm (degree C), snow temperature half way through the snow pack (degree C), soil temperature (degree C), air temperature (degree C), average grain size (mm), grain type, snow water content (subjective), snow patchiness (%) in the surrounding area, visible impurities in snow yes/no and land cover.

本数据集收录了积雪与各类无雪地表（苔藓、地衣、岩石表面、地面植被）的反射太阳光光谱测量数据。本次测量旨在构建该数据集，以深入探究积雪覆盖特征及不同裸露地表目标对太阳光反射的影响，并将相关观测结果与积雪覆盖、部分积雪覆盖的北方针叶林的卫星反射率数据进行关联。本次测量使用的仪器为Analytical Spectral Devices Inc.公司生产的Field Spec Pro JR光谱仪。除在350~2500 nm波段范围内测得的237个光谱通道外，本数据集还包含测量站点的如下参数：站点编号、测量地点、测量时间、目标类型（积雪、裸露地表等）、云量（以八分量为单位）、积雪深度（厘米）、5cm深处积雪温度（摄氏度）、积雪层中部温度（摄氏度）、土壤温度（摄氏度）、空气温度（摄氏度）、平均雪粒粒径（毫米）、雪粒类型、积雪含水量（主观评定）、周边区域积雪斑块率（百分比）、积雪中是否存在可见杂质以及土地覆盖类型。