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Intercalibration of Hrdi and Windii Wind Measurements : Volume 15, Issue 9 (30/11/-0001)

By Burrage, M. D.

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Book Id: WPLBN0003981934
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Intercalibration of Hrdi and Windii Wind Measurements : Volume 15, Issue 9 (30/11/-0001)  
Author: Burrage, M. D.
Volume: Vol. 15, Issue 9
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Skinner, W. R., Hays, P. B., & Burrage, M. D. (-0001). Intercalibration of Hrdi and Windii Wind Measurements : Volume 15, Issue 9 (30/11/-0001). Retrieved from http://members.worldlibrary.net/


Description
Description: Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109, USA. The High Resolution Doppler Imager (HRDI) and the Wind Imaging Interferometer (WINDII) in- struments, which are both on the Upper Atmosphere Research Satellite, measure winds by sensing the Doppler shift in atmospheric emission features. Because the two observation sets are frequently nearly coincident in space and time, each provides a very e.ective validation test of the other. Discrepancies due to geophysical di.erences should be much smaller than for comparisons with other techniques (radars, rockets, etc.), and the very large sizes of the coincident data sets provide excellent statistics for the study. Issues that have been examined include relative systematic o.sets and the wind magnitudes obtained with the two systems. A significant zero wind position di.erence of ~6 m s–1 is identified for the zonal component, and it appears that this arises from an absolute perturbation in WINDII winds of –4 m s–1 and in HRDI of +2 m s–1. Altitude o.sets appear to be relatively small, and do not exceed 1 km. In addition, no evidence is found for the existence of a systematic wind speed bias between HRDI and WINDII. However, considerable day-to-day variability is found in the quality of the agreement, and RMS di.erences are surprisingly large, typically in the range of 20±30 m s–1.

Summary
Intercalibration of HRDI and WINDII wind measurements

 

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