Some observatories have accurate information available on atmospheric pressure. If it is routinely available for every measurement, it should go in a column labelled PRESSURE, with the SI unit kPa. Note that pressures read from aneroid (dial-type) barometers are not very accurate, and probably should not be used. Only absolute pressures should be recorded, not values ``corrected to sea level''.
Table: Other column specifications for observational-data tables