This value needs to be set to your current, local barometric pressure in order for the altitude to read correctly. Stands for reference barometric pressure. Ref Baro - Found in the Altitude sub-menu (center button on Alt screen). Please note: Density Altitude will always read correctly on your Kestrel independent of your location or any reference values. In other words, it is the air density expressed as an altitude above sea level. When measuring pressure at sea level, station pressure and barometric pressure are equal.ĭensity Altitude - The altitude at which you would find the local air density, assuming standard atmospheric conditions (ISA). house, the top of a mountain, or on the shore).īarometric Pressure - The station pressure adjusted to mean sea level. Station Pressure - The pressure measured at a station, without any adjustment. Please note: Kestrels do not contain a GPS chip. GPS Altimeter - An instrument that determines your local altitude based on a GPS chip in the unit and satellites triangulating your location. Pressure Altimeter An instrument for determining elevation based on changes in air pressure. Auto Racing, Weather, Hikingīarometer - An instrument for measuring atmospheric pressure, used especially in weather forecasting.
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