Datastreams
Air Temperature
Air Temperature refers to the measure of the thermal state of the air at a specific location, indicating how hot or cold the air is.
Atmospheric Pressure
Atmospheric pressure refers to the air pressure at a given location due to the weight of the atmosphere. The atmospheric pressure at a location can change with weather and climate, with fluctuations in temperature, and is used in tracking and predicting changes in weather.
Matric Potential
Matric Potential is a measure of the energy required to extract water from a volume of soil. Water is held within the soil matrix by capillary and adsorptive forces and the soil's matric potential is a measure of how tightly water is bound to soil particles. The value is expressed as a negative pressure, with drier soil having a greater negative potential.
Reference Pressure
Reference Pressure is the pressure measured from the negative side of the pressure-sensing element in a pressure sensor, and it serves as a baseline value for measuring other pressure values.
Relative Humidity
Relative Humidity (RH) refers to the amount of water vapor present in the air compared to the maximum amount the air can hold at a specific temperature, expressed as a percentage (%). A relative humidity of 100% means the air is fully saturated with water vapor, and any additional moisture would result in condensation (e.g., dew or rain).
Saturation Extract Electrical Conductivity (EC)
The Electrical Conductivity of a soil Saturation Extract sample is a measurement of how well the sample conducts electricity. This conductivity indicates the amount of dissolved salts that may be present in the soil; this salinity provides insight into the health of the soil and its potential impact on plant growth.
Soil Temperature
Soil Temperature refers to the measurement of the average kinetic energy of the molecules in a volume of soil, and is expressed in degrees Celsius (°C) or Fahrenheit (°F).
Solar Radiation
Solar Radiation refers to the amount of sunlight detected by the sensor at a given location. This is a measure of the solar energy received at the location, expressed in watts per square meter (W/m²).
Water Content
Water Content refers to the amount of water present in a volume of soil. Volumetric water content is expressed as the volume of water per the total volume of soil, commonly with units as a ratio of cubic meters (m³/m³).
Wind Direction
Wind Direction refers to the direction from which the wind is blowing, typically measured in degrees from true north.
Wind Speed
Wind Speed refers to the rate at which air is moving in the atmosphere at a specific location.
