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WATER: Dataset of ground truth measurements synchronizing with EO-1 Hyperion in the Yingke oasis foci experimental area from Sep. 5 to Sep. 10, 2007, during the pre-observation period Chinese Version


The dataset of ground truth measurements synchronizing with EO-1 Hyperion was obtained in the Yingke oasis foci experimental area from Sep. 5 to Sep. 10, 2007 during the pre-observation period. It was carried out by the 6th sub-project of Chinese State Key Basic Research Project along Zhangye city-Yingke oasis-Huazhaizi, and on the very day of 10, one scene was captured.

The key site in the forest hydrology experimental area and the upper stream arid region hydrology experimental area of the Heihe river basin was chosen. It mainly included vicinity of Linze township and that of Zhangye city. The observation items were the forest, the farmland (with patches of single vegetation), the grassland (with patches of single vegetation) and the bare land, all with an area of at least 90m×90m. 42 points were selected, including maize with ears and maize without ears, the beet, the cabbage and the pea.

For another observation aim, the relationship between soil reflectance and the metallic element content, 49 bare land points were selected, and biochemical parameters including chlorophyll consistency, the leaf area, water content (green weight and dry weight), and LAI were measured by GARMIN GPS 76. The data were archived as .txt files.

(1) chlorophyll consistency both by portable SPAD and by acetone method, archived as .txt files

(2) the leaf area by LI-3000 and by LAI-2000 respectively, archived as .txt files

(3) photosynthesis by LI-6400 from Institute of Remote Sensing Applications. Raw data were archived in the user-defined format (by notepat.exe) and processed data were as Excel files.

(4) ground object reflectance spectra by ASD FieldSpec (350~2500 nm) from Institute of Remote Sensing Applications. The reference grey board was used. The maize canopy reflectance was collected at the height of 3m with the help of bamboo poles. Soil reflectance (bare land preferred) was measured at three points by the same way at a hight of 40cm.. Raw data were binary files direct from ASD (by ViewSpecPro), which were recorded daily in detail, and pre-processed data on reflectance were in .txt format.

(5) radiometric calibration by ASD FieldSpec (350~2500 nm) from Remote Sensing Institute. The reference grey board was used. The cement playground of Hexi University was chosen as the bright target and the dark water target was chosen in a park in Zhangye city. Raw data were binary files direct from ASD (by ViewSpecPro), which were recorded daily in detail, and pre-processed data on reflectance were in .txt format.

This data set provides reliable ground data for developing and validating retrieval methods of biophysical parameters from EO-1 Hyperion images.


CitationHelp

Data Citation Niu Zheng, Qin Yuchu, Wu Chaoyang, Yuan Jinguo, Zhan Yulin, Dong Jingjing, Lu Peng. WATER: Dataset of ground truth measurements synchronizing with EO-1 Hyperion in the Yingke oasis foci experimental area from Sep. 5 to Sep. 10, 2007, during the pre-observation period. Institute of Remote Sensing Applications, Chinese Academy of Sciences. 2008. doi:10.3972/water973.0190.db


Special Publications

  1. Li X, Li XW, Li ZY, Ma MG, Wang J, Xiao Q, Liu Q, Che T, Chen EX, Yan GJ, Hu ZY, Zhang LX, Chu RZ, Su PX, Liu QH, Liu SM, Wang JD, Niu Z, Chen Y, Jin R, Wang WZ, Ran YH, Xin XZ, Ren HZ. Watershed Allied Telemetry Experimental Research. Journal of Geophysical Research, 2009, 114(D22103), doi:10.1029/2008JD011590.Detail | Download
  2. Wang Liangxu, Wang Shuguo, Ran Youhua. Data Sharing and Data Set Application of Watershed Allied Telemetry Experimental Research. IEEE Geoscience and Remote Sensing Letters, 2014, 11(11):2020-2024. doi:10.1109/LGRS.2014.2319301Detail | Download
  3. Li X, Li XW, Roth K, Menenti M, Wagner W. Preface 'Observing and modeling the catchment scale water cycle'. Hydrology and Earth System Sciences, 2011, 15(2): 597-601. doi:10.5194/hess-15-597-2011.Detail | Download

Limitations

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.

Fund

  • National Program on Key Basic Research Project (973 Program) (No. 2007CB714400)
  • The CAS (Chinese Academy of Sciences) Action Plan for West Development Project (No. KZCX2-XB2-09)

Online Resources