
.topic 30
Port Meteorological Officer


.topic 40
Consists of a circular metallic chamber exhausted of air and hermetically sealed. Variations of atmospheric pressure produce changes in the dimensions of the vacuum chamber and these changes are magnified mechanically, optically or electrically, so that the atmospheric pressure may be read on a convenient scale


.topic 50
Deutscher Wetterdienst


.topic 60
height correction [hPa] = pressure reading [hPa] * station elevation [metres] / (29.27 * air temp [K])


.topic 70
Koninklijk Nederlands Meteorologisch Instituut

