Accurate static-pressure measurements are a prerequisite for safe navigation and precise air-data measurements on aircraft. Pressure is also fundamental for wind and air temperature analysis in meteorology. Static-pressure measurement by aircraft is disturbed by aerodynamics and needs to be corrected using calibration. In this paper, a comparison has been made between static pressure measured by means of a trailing cone in the atmosphere behind two different jet aircraft at flight levels up to 450 and data from numerical weather predictions. The height is derived from differential Global Navigation Satellite System measurements. The Global Navigation Satellite System height is compared to numerical-weather-prediction geopotential height. The numerical-weather-prediction data were provided by the Integrated Forecast System of the European Centre for Medium-Range Weather Forecasts. When computing the geopotential with latitude-/height-dependent gravity, the pressure/height differences are 0.01 ± 0.15    h Pa and 0.6 ± 0.2    m . This pressure accuracy implies numerical-weather-prediction temperature errors < 0.1    K on average below 10 km altitude. The trailing-cone measurements provide a first quantification of the case-specific accuracy of numerical-weather-prediction pressure–geopotential relationships. The method of comparing operational pressure/Global Navigation Satellite System measurements on aircraft with numerical-weather-prediction analysis or predictions can be used to test the height-keeping performance of aircraft after or during operation.


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    Title :

    Static Pressure from Aircraft Trailing-Cone Measurements and Numerical Weather-Prediction Analysis


    Contributors:

    Published in:

    Journal of Aircraft ; 54 , 5 ; 1728-1737


    Publication date :

    2017-09-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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