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  • Daily files of wind profiles (10 minute average values) between 11 and 300m altitude, measured by the ZephIR 300M wind lidar (ZP firmware), obtained during a measurement campaign by KNMI at the Cabauw site from February 2018 to June 2020. Related datasets are <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-1s-1">windlidar_cabauw_zephir300M_zp738_1s</a> (with the raw data instead of the 10-minute averaged output), and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-10min-1">windlidar_cabauw_zephir300M_zx973_10min</a> and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-1s-1">windlidar_cabauw_zephir300M_zx973_1s</a>, which are wind lidar dataset that were taken with a newer firmware (ZX), for the last three months of the campaign (Feb. 2020-June 2020).

  • Daily files of wind profiles (10 minute average values) between 11 and 300m altitude, measured by the ZephIR 300M wind lidar (ZX firmware), obtained during a measurement campaign by KNMI at the Cabauw site from February 2020 to June 2020. Related datasets are <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-1s-1">windlidar_cabauw_zephir300M_zx973_1s</a> (with the raw data instead of the 10-minute averaged output), and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-10min-1">windlidar_cabauw_zephir300M_zp738_10min</a> and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-1s-1">windlidar_cabauw_zephir300M_zp738_1s</a>, which are wind lidar dataset that were taken with an older firmware (ZP) for the full period of the campaign (Feb. 2018-June 2020).

  • Daily files of wind profiles (raw data) between 11 and 300m altitude, measured by the ZephIR 300M wind lidar (ZP firmware), obtained during a measurement campaign by KNMI at the Cabauw site from February 2018 to June 2020. Related datasets are <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-10min-1">windlidar_cabauw_zephir300M_zp738_10min</a> (with the 10-minute averaged output instead of the raw data), and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-10min-1">windlidar_cabauw_zephir300M_zx973_10min</a> and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-1s-1">windlidar_cabauw_zephir300M_zx973_1s</a>, which are wind lidar dataset that were taken with a newer firmware (ZX) for the last three months of the campaign (Feb. 2020-June 2020).

  • Daily files of wind profiles (raw data) between 11 and 300m altitude, measured by the ZephIR 300M wind lidar (ZX firmware), obtained during a measurement campaign by KNMI at the Cabauw site from February 2020 to June 2020. Related datasets are <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zx973-10min-1">windlidar_cabauw_zephir300M_zx973_10min</a> (with the 10-minute averaged output instead of the raw data), and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-10min-1">windlidar_cabauw_zephir300M_zp738_10min</a> and <a href="https://dataplatform.knmi.nl/dataset/windlidar-cabauw-zephir300M-zp738-1s-1">windlidar_cabauw_zephir300M_zp738_1s</a>, which are wind lidar dataset that were taken with an older firmware (ZP) for the full period of the campaign (Feb. 2018-June 2020).

  • Groundwater levels at Cabauw have been measured since August 2003 in two fields south of the tower. Nine piezometers were placed in a row. Initially, 6 of those piezometers contained pressure transducers (of the brand Keller) to measure levels automatically every 4 hours. On 9 July 2010, the temporal resolution was increased to hourly. Several sensors have stopped working since 2003. Piezometers that were not measured automatically were measured during each filed visit, which was initially every 2 weeks, but has become longer towards the end of the measurement period.

  • Discharge has been measured at three locations. At these locations, measurement weirs have been installed in May 2007 to estimate discharges accurately. A V-notch weir is used to measure the inflow of surface water into the catchment near the Wielse Kade (Qin). Trapezoidal Rossum weirs have been installed to measure outflow (Qout1 and Qout2), of which the stage-discharge relations have been obtained by laboratory calibration. The uncertainty associated with the discharge measurement can be considerable in some cases.

  • Volumetric soil moisture contents have been measured daily between 6 november 2003 and 19 August 2010 with a TDR set-up developed by Heimovaara and Bouten consisting of six arrays of six sensors between 5 and 73 cm below the soil surface. The six arrays were positioned on the perimeter of a circle with a diameter of 9 m with equal distances. The TDR was calibrated by taking 6 undisturbed soil samples (diameter: 20 cm; height: 20 cm) into the lab and comparing independently measured volumetric soil moisture contents to the TDR measurements. Measurements were performed at midnight local time, without taking daylight savings time into account.

  • Discharge has been measured at three locations. At these locations, measurement weirs have been installed in May 2007 to estimate discharges accurately. A V-notch weir is used to measure the inflow of surface water into the catchment near the Wielse Kade (Qin). Trapezoidal Rossum weirs have been installed to measure outflow (Qout1 and Qout2), of which the stage-discharge relations have been obtained by laboratory calibration. The uncertainty associated with the discharge measurement can be considerable in some cases.

  • Unvalidated drop size distributions as measured by a 2D Video Distromenter at the remote sensing site at Cabauw, averaged over 1 minute periods, with diameter classes of 0.10 mm. Drops larger than 6.00 mm and drops with velocities that deviate more than +-40% of the theoretical fall velocities corresponding to the drop diameter are discarded. Data are available from 2008-07-01.

  • This dataset contains S-band (central frequency of 3.298 GHz) radar measurements from the TU Delft transportable atmospheric radar TARA. It includes profiles of the equivalent reflectivity factor. Further, the horizontal wind (speed and direction) and the vertical Doppler velocity profiles are supplied. TARA is placed at the remote sensing site at Cabauw. It is a very sensitive profiling radar providing time-height indicators.