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

Giez, Andreas and Mallaun, Christian and Zöger, Martin and Dörnbrack, Andreas and Schumann, Ulrich (2017) Static Pressure from Aircraft Trailing-Cone Measurements and Numerical Weather-Prediction Analysis. Journal of Aircraft, 54, pp. 1728-1737. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C034084 ISSN 0021-8669

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/1.C034084

Abstract

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 we compare static pressure measured by means of a trailing cone (TC) in the atmosphere behind two different jet aircraft at flight levels up to 450 with data from numerical weather predictions (NWP). The height is derived from differential Global Navigation Satellite System (GNSS) measurements. The GNSS height is compared to NWP geopotential height. The NWP data were provided by the Integrated Forecast System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF). When computing the geopotential with latitude/height dependent gravity the pressure/height differences are -0.01+-0.15 hPa and 0.6+-2.8 m. This pressure accuracy implies NWP temperature errors <0.1 K on average below 10 km altitude. The TC measurements provide a first quantification of the case-specific accuracy of NWP pressure-geopotential relationships. The method of comparing operational pressure/GNSS measurements on aircraft with NWP analysis or predictions can be used to test the height keeping performance of aircraft after or during operation.

Item URL in elib:https://elib.dlr.de/111325/
Document Type:Article
Title:Static Pressure from Aircraft Trailing-Cone Measurements and Numerical Weather-Prediction Analysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Giez, AndreasDLR, FXUNSPECIFIED
Mallaun, ChristianDLR, FXUNSPECIFIED
Zöger, MartinDLR, FXUNSPECIFIED
Dörnbrack, AndreasDLR, IPAUNSPECIFIED
Schumann, UlrichDLR, IPAhttps://orcid.org/0000-0001-5255-6869
Date:2017
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:54
DOI :10.2514/1.C034084
Page Range:pp. 1728-1737
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:pressure, altitude, error, height-keeping, trailing cone, numerical weather prediction, geopotential, undulation, ECMWF, Falcon, HALO
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Flugexperimente
Institute of Atmospheric Physics
Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Schumann, Prof.Dr.habil. Ulrich
Deposited On:01 Mar 2017 14:15
Last Modified:08 Mar 2018 18:41

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