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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/amt-2020-126
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2020-126
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  25 Jun 2020

25 Jun 2020

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This preprint is currently under review for the journal AMT.

An Approach to Minimize Aircraft Motion Bias in Multi-Hole Probe Wind Measurements made by Small Unmanned Aerial Systems

Loiy Al-Ghussain and Sean C. C. Bailey Loiy Al-Ghussain and Sean C. C. Bailey
  • Department of Mechanical Engineering, University of Kentucky, Lexington, Kentucky, USA 40506

Abstract. Multi-hole probe mounted on an aircraft provide the air velocity vector relative to the aircraft, requiring knowledge of the aircraft spatial orientation, translation, and velocity to translate this information to an Earth-based reference frame and determine the wind vector. As the relative velocity of the aircraft is typically an order of magnitude higher than the wind velocity, the extracted wind velocity is very sensitive to multiple sources of error including misalignment of the probe and aircraft coordinate system axes, sensor error and misalignment in time of the probe and aircraft orientation measurements in addition to aerodynamic distortion of the velocity field by the aircraft. Here, we present an approach which can be applied after a flight to identify and correct biases which may be introduced into the final wind measurement. The approach was validated using a ground reference, different aircraft, and for the same aircraft at different times. The results indicate significant reduction in wind velocity variance at frequencies which correspond to aircraft motion.

Loiy Al-Ghussain and Sean C. C. Bailey

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Status: open (extended)
Status: open (extended)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
  • SC1: 'FFT?', William Thielicke, 30 Jun 2020 Printer-friendly Version
    • AC1: 'FFT?', Sean Bailey, 01 Jul 2020 Printer-friendly Version
  • RC1: 'review', Anonymous Referee #2, 23 Jul 2020 Printer-friendly Version

Loiy Al-Ghussain and Sean C. C. Bailey

Loiy Al-Ghussain and Sean C. C. Bailey

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Latest update: 21 Sep 2020
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Short summary
Unmanned Aerial Vehicles equipped with multi-hole probes are an effective approach to measure the wind vector with high spatial and temporal resolution. However, the aircraft motion must be removed from the measured signal first, a process often introducing bias due to small errors in relative orientation of coordinates. Here we present an approach that has successfully been applied in post-processing which was found to minimize the influence of the aircraft motion on the wind measurements.
Unmanned Aerial Vehicles equipped with multi-hole probes are an effective approach to measure...
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