WATER: Dataset of spectral reflectance of canopy leafs observed by the integrating sphere in the Linze station foci experimental area from May to Jul, 2008

The dataset of spectral reflectance of canopy leafs observed by the integrating sphere was obtained by ASD Spectroradiometer (350～2 500 nm) and integrating spheres from BNU and the reference board (40% before Jun. 15 and 20% hereafter), in the Linze station foci experimental area. Maize quadrate, the desert green quadrate and withered scrub quadrate in Linze station (on May 28, 30, Jun. 19, 30 and Jul. 9), Wulidun farmland quadrates (on Jun. 24, 29 and Jul. 11) and the desert strips were measured. According to the fact that the ratio of the two DN values equals that of their reflectivity, the reflectivity and the tranmittivity can be calculated with the caliberation coefficient, reflection DN of the observed objects and reference plates. The reflectivity and the tranmittivity of interior vegetation leaves can be got by the integrating spheres. Raw spectral data were archived as binary files, which were recorded daily in detail, and pre-processed data on reflectance and transmittivity were archived as text files (.txt).

该数据集记录了由积分球测得的冠层叶片光谱反射率数据，数据采集设备为美国 ASD 公司生产的分光辐射计（波长范围为 350～2 500 nm），并使用北京师范大学提供的积分球及参考板（6月15日前为40%，此后为20%）。数据采集地点为林州站焦点实验区。具体测量对象包括林州站的玉米方形样地、沙漠绿方形样地和枯萎灌木方形样地（分别于5月28日、30日、6月19日、30日和7月9日测量），乌里东农田方形样地（6月24日、29日和7月11日测量）以及沙漠地带。根据两个DN值之比等于其反射率之比的事实，结合校准系数、观测对象的反射DN值和参考板反射DN值，可计算出反射率和透射率。内部植被叶片的反射率和透射率可通过积分球测量获得。原始光谱数据以二进制文件形式归档，每日详细记录，预处理后的反射率和透射率数据则以文本文件（.txt格式）归档。