(1) the soil temperature in L1, L2, L3, L4, L5, L6 and L7;
(2) roughness measured by the roughness grid board and collected by the digital camera. Files with "result" field were processed data, in which the first row was RMS height (cm; one value), the second row was distance (cm), and the third row was correlation function (cm; changed into correlation length when it is 1/e).
(3) GPR and TDR data.
Five files were included, roughness photos and preprocessed data, the soil temperature, coordinates of quadrates and sampling lines, GPR and microwave radiometer data. All were archived as Excel and .txt files. Those provide reliable ground data for development and validation of soil moisture and freeze/thaw algorithms from active remote sensing approaches.
Data Citation Zhang Lixin, Che Tao, Bai Yunjie, Cao Yongpan, Chai Yuan, Chang Sheng, Du Ziqiang, Hao Xiaohua, Huang Bo, Li Xiaoyu, Li Shihua, Luo Zhen, Patrick Klenk, Qian Yonggang, Sun Xiaoqing, Wang Zhixia, Wu Yueru, Wang Jindi, Yao Dongping, Zhao Shaojie, Zheng Yue, Zhao Yingshi. WATER: Dataset of ground truth measurement synchronizing with the airborne microwave radiometers (L&K bands) mission in the Biandukou foci experimental area on May 25, 2008. Beijing Normal University; Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science; Graduate University of Chinese Academy of Sciences; South China Agricultural University; Heidelberg University; University of Electronic Science and Technology of China. 2008. doi:10.3972/water973.0040.db
The dataset is generated from the "Watershed Airborne Telemetry Experimental Research (WATER) “, the user must have a clear statement in the article of the original data source and adopt the reference style providing by the metadata in the References section.