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Calibration of 3-D wind measurements on a single-engine research aircraft

Mallaun, Christian and Giez, Andreas and Baumann, Robert (2015) Calibration of 3-D wind measurements on a single-engine research aircraft. Atmospheric Measurement Techniques, 8 (8), pp. 3177-3196. Copernicus Publications. DOI: 10.5194/amt-8-3177-2015 ISSN 1867-1381

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Official URL: http://www.atmos-meas-tech.net/8/3177/2015/


Abstract. An innovative calibration method for the wind speed measurement using a boom-mounted Rosemount model 858 AJ air velocity probe is introduced. The method is demonstrated for a sensor system installed on a medium-size research aircraft which is used for measurements in the atmospheric boundary layer. The method encounters a series of coordinated flight manoeuvres to directly estimate the aerodynamic influences on the probe and to calculate the measurement uncertainties. The introduction of a differential Global Positioning System (DGPS) combined with a high-accuracy inertial reference system (IRS) has brought major advances to airborne measurement techniques. The exact determination of geometrical height allows the use of the pressure signal as an independent parameter. Furthermore, the exact height information and the stepwise calibration process lead to maximum accuracy. The results show a measurement uncertainty for the aerodynamic influence of the dynamic and static pressures of 0.1 hPa. The applied parametrisation does not require any height dependencies or time shifts. After extensive flight tests a correction for the flow angles (attack and sideslip angles) was found, which is necessary for a successful wind calculation. A new method is demonstrated to correct for the aerodynamic influence on the sideslip angle. For the three-dimensional (3-D) wind vector (with 100 Hz resolution) a novel error propagation scheme is tested, which determines the measurement uncertainties to be 0.3 m s−1 for the horizontal and 0.2 m s−1 for the vertical wind components.

Item URL in elib:https://elib.dlr.de/99600/
Document Type:Article
Title:Calibration of 3-D wind measurements on a single-engine research aircraft
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mallaun, ChristianDLR, FXUNSPECIFIED
Date:12 August 2015
Journal or Publication Title:Atmospheric Measurement Techniques
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/amt-8-3177-2015
Page Range:pp. 3177-3196
Publisher:Copernicus Publications
Keywords:airborne 3-D wind sensor, aerodynamic error parametrisation, in-flight calibration, flight test maneuver, error propagation, Cessna Caravan
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
Location: Oberpfaffenhofen
Institutes and Institutions:Flugexperimente > Forschungsflugabteilung Oberpfaffenhofen
Institute of Atmospheric Physics
Deposited By: Baumann, Robert
Deposited On:30 Nov 2015 07:46
Last Modified:02 May 2019 14:13

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