edu.ucar.opensky::technotes:540 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:47:43.689643 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7qr4zqr Characterization of Uncertainty in Measurements of Wind from the NSF/NCAR Gulfstream V Research Aircraft 2016-07-01T00:00:00Z publication https://n2t.org/ark:/85065/d7qr4zqr https://doi.org/10.5065/D60G3HJ8 Cooper, William A. author Friesen, Richard B. author Hayman, Matthew author Jensen, Jørgen B. author Lenschow, Donald H. author Romashkin, Pavel A. author Schanot, Allen author Spuler, Scott M. author Stith, Jeffrey Len author Wolff, Cory author UCAR/NCAR - Library publisher This technical note presents an analysis of uncertainty for measurements of wind from the Gulfstream V research aircraft operated by the National Center for Atmospheric Research for the National Science Foundation. It begins with a description of the instruments used to make the needed measurements and the algorithms used for calculation of wind. Three systems are described, the primary system in depth, a new system based on a gust pod in lesser detail, and a laser air motion sensor still under development. In addition to specifying the characteristics of the component measurements and propagating their uncertainty to the final measurement of wind, the document presents detailed information on how the measurements are calibrated, processed to incorporate corrections, and checked with flight maneuvers. The results are presented in terms of standard uncertainties where possible, so if for example coverage intended to match 95% confidence intervals is desired the values quoted should be doubled. The net uncertainty in the standard measurement of vertical wind is 0.12 m/s, and a correction procedure for removing the Schuler oscillation in pitch is developed that with special processing can reduce this value. For the standard measurement of horizontal wind, the estimated standard uncertainty is about 0.4 m/s for each component of the vector wind. These estimates are supported by itemized lists of the sources of error and how the associated uncertainty has been measured. The report also suggests ways to improve the measurements, focused on the horizontal wind where the weakest measurement is that of heading. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Flight level winds Platform characteristics Sensor characteristics Vertical wind velocity/speed Calibration theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation