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Temperature and Humidity measurement at 2 m height
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Rotronic HygroClip HC2S3, MET21 Radiation Shield
Temperature Range: -40 °C .. +60 °C
Accuracy: ±0.1 °C, long term<0.1°C / year
Humidity Range: 0 .. 100 %
Accuracy: ±0.8%, long term < 1% / year
Data Rate: 0.2 Hz, Averaging Interval: 10 Minutes
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3-Component Wind Measurements (u,v,w); Water vapour, carbon dioxide at 6 m height
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Campbell IRGASON Integrated CO2 /H2O Open-Path Gas Analyzer and 3D Sonic Anemometer
Wind Speed Range 0 .. 65 m/s
Wind Speed Accuracy (x,y)< ±0.08 m/s
Wind Speed Accuracy (z)< ±0.04 m/s
Wind Direction Range 0 .. 359°
Wind Direction Accuracy:
Wind vector ±5° horizontal: < ±2% of reading
Wind vector ±10° horizontal: < ±3% of reading
Wind vector ±20° horizontal: < ±6% of reading
Data Rate 20 Hz, Averaging Interval: 10 Minutes
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Barometric Pressure Measurement
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Vaisala PTB330 Digital Barometer with Young 61002 Pressure Port
The Pressure Port minimizes dynamic pressure errors due to wind.
Pressure Range: 500 .. 1100 hPa
Accuracy: ±0.25 hPa, long term: ±0.1 hPa / year
Data Rate: 1 Hz, Averaging Interval: 10 Minutes
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Precipitation Measurement
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Tipping Bucket Raingauge Young 52202
Catchment Area: 200 cm²
Resolution: 0.1 mm
Accuracy: 2% up to to 25 mm/h, 3% up to 50 mm/h
Counting Interval: 10 Minutes
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Solar Radiation Measurement
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Kipp & Zonen CNR4 Net Radiometer
Pyranometer Spectral Response: 0.35 µm .. 2.8 µm
Pyrgeometer Spectral Response: 4.5 µm .. 42 µm
Pyranometer Accuracy: <5%
Pyrgeometer Accuracy: <10%
Data Rate: 0.2 Hz, Averaging Interval: 10 Minutes
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Soil Temperature Measurement
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Campbell TCAV Probe
Averages 4 type E thermocouples
Sensor depths 2 cm and 6 cm
Data Rate: 0.2 Hz, Averaging Interval: 10 Minutes
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Soil Heat Flux Measurement
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Two Hukseflux HFP01 Heat Flux Plates
Range: ±2000 W/m²
Accuracy: -15% .. +5% in most common soils
Data Rate: 0.2 Hz, Averaging Interval: 10 Minutes
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Soil Moisture Measurement (volumetric water content)
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Two Campbell CS616 Water Content Reflectometers
Accuracy: ±2.5% VWC in range 0% .. 50% VWC
Data Rate: 0.2 Hz, Averaging Interval: 10 Minutes
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Data Acquisition
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Campbell Scientific CR3000 Datalogger with NL115 Ethernet Interface and Compact Flash Module
Compact Flash card 16 GB
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Power Supply
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Phaesun Solar Panel, 60 Wpeak, Campbell CH200 Charging Regulator, VRLA Battery 84 Ah
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GPS Time synchronisation (done hourly with 0.2 ms accuracy)
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Garmin GPS16X-HVS GPS Receiver (12 channel)
PPS Accuracy: ±1µs
Acquisition Times (Approximate):
Reacquisition: Less than 2 s
Hot: 1 s (all data known)
Warm: ~38 s (initial position, time and almanac known, ephemeris unknown)
Cold: ~45 s
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Data Transmission (only Averages)
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Campbell Scientific COM110 GPRS Modem
Quadband, GPRS Multislot Class 10 (< 40 kBit/s Upload)
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