This is notable as the first accurate recording barograph. Her altitude had exceeded the rating for the barograph drum. Various other types of barograph have also been invented. The principle of the barograph is same as that of the aneroid barometer. Examples are the barograph, wind, or thermograph traces, and early upper air soundings. This is to adjust the barograph so that it correctly reflects the station pressure. More advanced units often incorporate a barograph for recording flight data and/or a built-in GPS. A barograph is a barometer that records the barometric pressure over time in graphical form.