Air pressure measured at a specific location is known as:

The term used to describe air pressure measured at a specific location is "station pressure." This represents the actual atmospheric pressure at the location of the measuring instrument, which is often a barometer located at a weather station. Station pressure is crucial for meteorological observations, as it provides the baseline data needed for various analyses and forecasts.

In contrast, sea level pressure refers to the atmospheric pressure adjusted to sea level, allowing for comparisons between different locations regardless of altitude. Altitude pressure is not a standard term used in meteorology; it might imply the reduction of pressure due to elevation, but it does not specify a direct measurement at ground level. Ambient pressure is more of a general term that refers to the surrounding air pressure in a given environment and is not as specific or commonly used in meteorological contexts as station pressure. Thus, station pressure is the most precise term for the air pressure measured directly at the location of interest.