![]() Regarding airplanes yes they switch altimeters around some altitude (i belive 12 000 feet) and switch their mean se level pressure to 1013 hPa in their altimeters. ![]() Shall i take pressure at altitude 76m and find pressure at the Mean Sea Level = 0m and use that pressure from mean sea level in the formula or something else.įrom that what I see the idea is to adjust pressure at the sea level and than calculate altitude. Which pressure should be used and feed to the formula as p0 (p0 is present in formula presented here as well as in eurocontrol document as pb)? ![]() Pressure indicated by one of the altimeters (not conatining pressure sensor that we are talking about) = 1005hPa Pressure indicated by the ventusky (weather forecast) 1016hPa Temperature indicated by the ventusky (weather forecast) 11degC Temperature measured by termometer in the car 8deg C Radar could not be used same as Lidar or laser measurement.Īltitude above mean sea level = 78 m - from digital terrain model There is no other technical way to use different sensor (GPS altitude indication is not correct on these altitudes and also not correct by the definition). And that result is a proof of beating some World record. The result form the sensor (on of the popular Bosh sensors) is a pressure - we convert it to altitude using International Standard Atmosphere model (formula is different than the one presented here). The formula that you provided will give the different results to the one in the cited eurocontrol document.
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