Equipment | Manufacturer | Model |
---|---|---|
Tower | Campbell Scientific | UT20 (Hinged for lowering) |
Electronics Enclosure | Campbell Scientific | ENC16/18 |
Solar Panel | Campbell Scientific ()BP Solar) | SP20 |
Solar Controller | Morningstar | Sunguard-SG4 |
Measurement | Sensor Type | Manufacturer | Model Number | Units (reported) |
Sampling Frequency/rate |
Reporting Frequency |
---|---|---|---|---|---|---|
Temperature - Soil | Thermistor | Campbell Scientific | 107-l | Celsius | 5 seconds | 15 Minutes |
Temperature - Air (60 cm) |
Thermistor | Campbell Scientific | 107-l | Celsius | 15 seconds | 15 Minutes |
Temperature - Air (2 m) |
Bandgap | Campbell Scientific | CS215 | Celsius | 15 seconds | 15 Minutes |
Temperature - Air (10 m) |
Thermistor | Campbell Scientific | 107-l | Celsius | 15 seconds | 15 Minutes |
Relative Humidity | Capacitive | Campbell Scientific | CS215 | Percent | 5 seconds | 15 Minutes |
Rainfall | Tipping Bucket | H-340 | Inches | .01 inch | 15 Minutes | |
Barometric Pressure | Capacitive | Campbell Scientific | CS105 | Millibars | 5 seconds | 15 Minutes |
Solar Radiation | Silicon Photovoltaic | Campbell Scientific | LI200X | Watts per square meter | 5 seconds | 15 Minutes |
Wind Speed | Ultrasonic | Vaisala | 425A | Miles per hour | 5 seconds | 15 Minutes |
Wind Direction | Ultrasonic | Vaisala | 425A | Degrees | N/A | 15 Minutes |
Temperature - Dew Point (2m) |
Calculated* | N/A | N/A | Celsius | N/A | 15 Minutes |
Temperature - Wet Bulb (2m) | Calculated* | N/A | N/A | Celsius | N/A | 15 Minutes |
Evapotranspiration (ET) | Calculated* | N/A | N/A | Inches per day | N/A | 24 Hours |
*Measurement - CalculatedTemperature - Dew Point (2m):
Td = 243 * ln(e / 6.112) / 17.67 - ln(e / 6.112) where: Td = Dew Point Temperature (2m) e = Vapor Pressure = relative humidity / 100 * es and es = Saturation Vapor Pressure = 6.112 * exp(17.67 * T / (T + 243.5)) T = Temperature (2m)Temperature - Wet Bulb (2m) - calculated by using Newton-Raphson algorithm:
Tw= es- 0.000666 * P * (T -Two) - Td where: es= Saturated Vapor Pressure P = Station Pressure T = Air Temperature (2m) Two= Wet Bulb Temperature (from previous iteration, 0 in first iteration) Td= Dew Point Temperature (2m) References: http://mysite.du.edu/~etuttle/weather/atphys.htm http://en.wikipedia.org/wiki/Newton%27s_methodEvapotranspiration: FAO Penman-Monteith.
Reference: http://ufdcimages.uflib.ufl.edu/UF/E0/00/73/60/00001/mitchell_m.pdf
Equipment | Manufacturer | Model |
---|---|---|
Radio (local Intranet) | Campbell Scientific | RF401 |
Modem (local Intranet) | Campbell Scientific | NL100 |
Modem (cellular) | Campbell Scientific | Raven Edge |
Measurement | Minimum Value | Maximum Value |
---|---|---|
All Temperature (C) | -20 | 50 |
Relative Humidity (%) | 0 | 100 |
Barometric Pressure (mb) | 940 | 1060 |
Rain (in) | 0 | 3 |
Solar Radiation (W/m2) | 0 | 1200 |
Wind Speed (mph) | 0 | 75 |
Wind Direction (deg) | 0 | 360 |
Measurement | Time Step (Hours) | Threshold |
---|---|---|
All Temperature (C) | 1 | 10 |
Barometric Pressure (mb) | 3 | 6 |