WATER: Dataset of ground truth measurements synchronizing with MODIS, ALOS PALSAR and AMSR-E in the Biandukou foci experimental area on May 24, 2008

The dataset of ground truth measurements synchronizing with MODIS, ALOS PALSAR and AMSR-E was obtained in the Biandukou foci experimental area on May 24, 2008. Observation items included: (1) the surface temperature in No. 1 (grassland), No. 2 (the rape land), No. 3 (the rape land), No. 4 (the wheat land) and No. 5 quadrate (wheat and rape); (2) the soil moisture by WET in No. 2 quadrate; (3) GPR and WET; (4) The spectrum by ASD Fieldspec FRTM (Boulder, Co, USA), 350nm-2500nm, 3nm for the visible near-infrared band and 10nm for the shortwave infrared band). The spectrum data were archived in the ASCII format, with the first five rows as the file header and the following two columns as wavelength (nm) and reflectance (percentage) respectively, and can be opened by .txt or wordpad. The .txt file was not reflectance but intermediate file for further calculation. Raw data were binary files direct from ASD (by ViewSpecPro). The surface radiative temperature and the physical temperature were measured by the handheld infrared thermometer. Besides, the cover type was also recorded. The data can be opened by Microsoft Office. Soil moisture was acquired by WET and the cutting ring. The data can be opened by Microsoft Office. Six data files were included, soil moisture, the surface temperature, GPR, coverage photos and preprocessed data, ground objects spectrum and satellite images.

本数据集于2008年5月24日在比亚杜库焦点实验区获取，与MODIS、ALOS PALSAR及AMSR-E同步进行实地测量。观测项目包括：(1) No. 1（草地）、No. 2（油菜地）、No. 3（油菜地）、No. 4（小麦地）以及No. 5（小麦与油菜混种）方格内的地表温度；(2) No. 2方格内的土壤湿度（采用WET测量）；(3) GPR与WET；(4) 由美国科罗拉多州博尔德市的ASD Fieldspec FRTM光谱仪（350nm-2500nm，可见光近红外波段为3nm，短波红外波段为10nm）所获取的光谱数据。光谱数据以ASCII格式存档，前五行作为文件头部，随后两列分别为波长（nm）和反射率（百分比），可使用.txt或wordpad打开。.txt文件非反射率数据，而是用于进一步计算的中间文件。原始数据为ASD（通过ViewSpecPro）直接提供的二进制文件。地表辐射温度和物理温度通过手持式红外温度计进行测量。此外，还记录了覆盖类型。数据可使用Microsoft Office打开。土壤湿度通过WET和切割环获取，数据同样可使用Microsoft Office打开。数据集包含六个数据文件，包括土壤湿度、地表温度、GPR、覆盖照片和预处理数据、地面物体光谱和卫星图像。