Grosses Bruch is a pasture within a flat wetland area (Wollschläger et al., 2016 (link)). It is located in the Central German Lowland and susceptible to drought due to negative climatic water balance (Hermanns et al., 2021 (link)). The soil texture is defined as highly clayey silt (BGR, 2007 ). During the date of acquisition, the entire area was used for cattle grazing. We consider the hydrological status at the site as water limited, since Hermanns et al. (2021) (link) detected drought stress of the vegetation at the site at even higher SMC than those measured in our data acqusition (Hermanns et al., 2021 (link)).
After the overflight, we took 51 SMC measurements with an FDR probe (ML3 Theta Probe, Delta-T Devices Ltd, Great Britain). For each sample, five measurements were taken in a cross-shaped arrangement within a 25 cm radius and then averaged. We recorded the GPS location with the Leica Zeno GG04 DGPS of the central measurement (Fig. 1e ). The measurements were calibrated with a sensor specific calibration curve (Francke, 2020 ).
After the overflight, we took 51 SMC measurements with an FDR probe (ML3 Theta Probe, Delta-T Devices Ltd, Great Britain). For each sample, five measurements were taken in a cross-shaped arrangement within a 25 cm radius and then averaged. We recorded the GPS location with the Leica Zeno GG04 DGPS of the central measurement (