Meteorology is the science that deals with the atmosphere and its phenomena. Major area's of research concern the weather, weather forecasting and atmospheric composition.

When discussing technology of instruments, sensors and observing systems, as much as possible we follow the categories of WMO, World Meteorological Organisation, laid down in the Manual on Instruments and Methods of Observation.

However, some adaptations have been made:

We have added categories of soil heat flux, soil conductivity, soil thermal properties (conductivity / resistivity), ground water level, water level, water flow, water temperature, water composition, cloud properties, acoustic noise and lightning.

Atmospheric composition has been separated into atmospheric gasses and aerosols. The gasses include ozone, which is no longer treated as a separate category. The "state of the ground" has been separated from past and present weather. Radiation includes sunshine duration.

Meteorological Variables:

Atmospheric Pressure
Surface Wind
Soil: Moisture, Temperature, Heat Flux, Conductivity, Thermal Properties
State of the Ground
Ground Water level
Upper Air: Pressure, Temperature, Humidity, Wind
Present and Past Weather
Clouds: Observation, Properties
Atmospheric Composition: Gasses, Aerosols
Water: Flow, Temperature, Level, Composition

Acoustic noise: Level

And on the sideline for agro-meteorology:

Plants: Sap flow, leaf parameters, plant physiology etc

Sensors need to be calibrated: see Calibration.