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  • This dataset contains calibrated attenuated backscatter profiles from the CHM15k ceilometer, a one-wavelength backscatter lidar operating at 1064 nm. It includes calibrated, unvalidated daily aggregated files at five sites: Cabauw, De Kooy, Groningen Airport Eelde, Maastricht Aachen Airport and Vlissingen. Level 2 data processing is performed by the Eumetnet E-PROFILE ALC data hub: https://www.eumetnet.eu/activities/observations-programme/current-activities/e-profile/. Vertical resolution 30 m, time resolution 5 minutes.

  • Dataset containing hourly data files provided by Ruisdael Observatory's Metek Micro Rain Radar (SN 0510056436) placed at The Green Village (Van Den Broekweg 4, 2628 CR Delft). Time interval of measurements is 10 seconds and the range resolution is preferred to be set to 35 meters; however, data between 2020-11-09 and 2021-11-06 presents a 25m resolution. Compared with version 1, data will Drop Size Distribution spectra variable, as the instrument's firmware has been update to a newer version (v2.0.23). Notes: Being The Green Village a test site, there could be some effect on the quality and availability of the data.

  • Dataset containing hourly data files provided by Ruisdael Observatory's Metek Micro Rain Radar (SN 0513108318) placed at De Zweth. Time interval of measurements is 10 seconds and the range resolution is preferred to be set to 35 meters

  • Dataset containing hourly data files provided by Ruisdael Observatory's Metek Micro Rain Radar (SN 0513108322) placed at Slufter. Time interval of measurements is 10 seconds and the range resolution is preferred to be set to 35 meters

  • Dataset containing hourly data files provided by Ruisdael Observatory's Metek Micro Rain Radar (SN 0512067699) placed at KNMI’s Remote Sensing Site in Cabauw. Time interval of measurements is 10 seconds and the range resolution is preferred to be set to 35 meters.

  • Dataset containing hourly data files provided by Ruisdael Observatory's Metek Micro Rain Radar (SN 0513108314) placed at Westmaas. Time interval of measurements is 10 seconds and the range resolution is preferred to be set to 35 meters.

  • This dataset contains backscatter profiles from the CHM15k ceilometer, a one-wavelength backscatter lidar operating at 1064 nm. It includes daily uncalibrated, unvalidated data reported by the instrument at five sites: Cabauw, De Kooy, Groningen Airport Eelde, Maastricht Aachen Airport and Vlissingen. Retrieved cloud base heights up to 3 layers, sky condition information and aerosol layer height, based on manufacturer algorithms are included. Vertical resolution 10 m, time resolution 12 s.

  • 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.