# data[].attributes.definition
The length of the arc of the horizon (in degrees) intercepted between a given point and a reference direction, usually north, and measured clockwise from the reference direction.

# data[].attributes.definition
The pressure altitude corrected for temperature deviations from the standard atmosphere.
Density altitude bears the same relation to pressure altitude as true altitude does to indicated altitude.

# data[].attributes.definition
The ratio of radar reflectivity measured by means of two signals that differ in one attribute, for example, polarization or wavelength.

# data[].attributes.definition
The radial component of the velocity vector of a scattering object as observed by a remote sensor, such as a Doppler radar or Doppler lidar.

# data[].attributes.definition
The frequency distribution of drop sizes (diameters, volumes) that is characteristic of a given cloud or of a given fall of rain.

# data[].attributes.definition
A measure (or condition) of height, especially with respect to the height of a point on the earth's surface above a reference plane (usually mean sea level), as "station elevation."

# data[].attributes.definition
A measure of the weight of the liquid water droplets in the atmosphere above a unit surface area on the earth, given in units of kg m-2, for example.

# data[].attributes.definition
a measure of the efficiency of a radar target in intercepting and returning radio energy

# data[].attributes.definition
The total amount of water, including the water vapor, in an unsaturated soil.

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A velocity is a vector quantity. Vertical indicates a vector component which is positive when directed upward, negative when directed downward.

# data[].attributes.definition
Isobaric wet-bulb temperature: the temperature an air parcel would have if cooled adiabatically to saturation at constant pressure by evaporation of water into it, all latent heat being supplied by the parcel.

Or from wikipedia: The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in cloth which has been soaked in water at ambient temperature (a wet-bulb thermometer) and over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature); at lower humidity the wet-bulb temperature is lower than dry-bulb temperature because of evaporative cooling