WATER: Dataset of ground truth measurements synchronizing with Envisat ASAR in the Biandukou foci experimental area during the pre-observation period (Oct. 18, 2007)


The dataset of ground truth measurements synchronizing with Envisat ASAR was obtained in No. 1 and 2 quadrates of the Biandukou foci experimental area on Oct. 18, 2007, during the pre-observation period.

The ASAR data were in AP mode and VV/VH polarization combinations, and the overpass time was approximately at 11:17 BJT. Both the quadrates were divided into 3×3 subsites, with each one spanning a 30×30 m2 plot. 25 sampling points were chosen, including centers and corners.

Simultaneous with the satellite overpass, numerous ground data were collected: the soil temperature , volumetric soil moisture (cm^3/cm^3), soil salinity (s/m), soil conductivity (s/m) by the Hydra probe, the surface radiative temperature by the handheld infrared thermometer, gravimetric soil moisture, volumetric soil moisture, and soil bulk density by drying soil samples from the cutting ring (100cm^3). Meanwhile, vegetation parameters as height, coverage and water content were also observed.

Those provide reliable ground data for the development and validation of soil moisture, soil freeze/thaw algorithms and the forward model from active remote sensing approaches.


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WANG Xufeng. WATER: Dataset of ground truth measurements synchronizing with Envisat ASAR in the Biandukou foci experimental area during the pre-observation period (Oct. 18, 2007). A Big Earth Data Platform for Three Poles, 2013. doi: 10.3972/water973.0024.db. (Download the reference: RIS | Bibtex )

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Support Program

The CAS (Chinese Academy of Sciences) Action Plan for West Development Project (No:KZCX2-XB2-09)

National Program on Key Basic Research Project (973 Program (No:2007CB714400)

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: BAI Yunjie   CAO Yongpan   王建   王维真   WANG Xufeng   晋锐   屈永华   周红敏  

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