Identification

Title

Characterization of Uncertainty in Measurements of Wind from the NSF/NCAR Gulfstream V Research Aircraft

Abstract

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.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7qr4zqr

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Keyword set

keyword value

EARTH SCIENCE > SPECTRAL/ENGINEERING > PLATFORM CHARACTERISTICS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > VERTICAL WIND VELOCITY/SPEED

EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > CALIBRATION/VALIDATION > CALIBRATION

EARTH SCIENCE > SPECTRAL/ENGINEERING > SENSOR CHARACTERISTICS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS > FLIGHT LEVEL WINDS

originating controlled vocabulary

title

U.S. National Aeronautics and Space Administration Global Change Master Directory

reference date

date type

revision

effective date

2021-09-17

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2016-07-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata date

2023-08-18T18:06:40.177283

Metadata language

eng; USA