Table 2.

Sensor details for the ATMOS41 weather station as well as the ICOS-bkp, Integrated Carbon Observation System (ICOS) or Vaisala station.

Parameter	ATMOS41	ICOS-bkp, ICOS or Vaisala
Radiation	Miniature pyranometer with silicon-cell (Apogee Instruments, Logan, USA) Resolution: 1 W/m2 Accuracy: ±5%	Pyranometer with permanent ventilation/heating (CMP21, Kipp & Zonen, Delft, Netherlands; EUR 900) Resolution: 1 W/m2 Accuracy: ±1%
Precipitation	Optical sensor rain gauge with 68 cm2 catch area (METER Group Inc., Pullman, USA) Resolution: 0.017 mm Accuracy: ±5% (up to 50 mm/h)	Weighing rain gauge with 200 cm2 catch area (Pluvio2, Ott HydroMet, Kempten, Germany; EUR 5000) Resolution: 0.05 mm within an hour Accuracy: ±1 mm
Temperature	Thermistor, non-aspirated (METER Group Inc., Pullman, USA) Resolution: 0.1 °C Accuracy: ±0.6 °C	Resistance thermometer PT100 1/3 Class B (HC2S3, Rotronic, Bassersdorf, Germany; EUR 900) Resolution: 0.01 °C Accuracy: ±0.1 °C
Relative humidity	(METER Group Inc., Pullman, USA) Resolution: 0.1% Accuracy: ±3% (varies with temperature and humidity)	ROTRONIC® Hygromer IN-1 (HC2S3, Rotronic, Bassersdorf, Germany) Resolution: 0.02% Accuracy: ±0.8%
Pressure	Barometric pressure sensor (METER Group Inc., Pullman, USA) Resolution: 0.1 hPa Accuracy: ±1.0 hPa	BAROCAP® sensor (PTB110, Vaisala Inc., Helsinki, Finland; EUR 730) Resolution: 0.1 hPa Accuracy: ±0.3 hPa (at +20 °C)
Wind speed	Ultrasonic anemometer (METER Group Inc., Pullman, USA) Resolution: 0.01 m/s Accuracy: the greater of 0.3 m/s or 3%	WINDCAP® ultrasonic transducer (WXT520, Vaisala Inc., Helsinki, Finland; EUR 2350) Resolution: 0.1 m/s Accuracy: ±3% at 10 m/s
Wind direction	Ultrasonic anemometer (METER Group Inc., Pullman, USA) Resolution: 1° Accuracy: ±5°	WINDCAP® ultrasonic transducer (WXT520, Vaisala Inc., Helsinki, Finland) Resolution: 1° Accuracy: ±3°