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GEM-CEDAR Challenge: Comparing Ionospheric Models with Poynting Flux from DMSP ObservationsAs part to the GEM-CEDAR challenge we are extending the model-data comparisons to electrodynamic in-situ measurements in low-Earth orbit. We use DMSP observations of electric and magnetic fields to compute Poynting Flux values along the satellite track in high latitudes including the auroral zones and the polar cap. Models of the ionosphere that include electrodynamic parameters have been run for five events selected for the GEM-CEDAR modeling challenge for which DMSP data are available for comparison. Combined with a magnetic field model we use the modeled electric fields to compute Poynting Flux and Joule Dissipation values from outputs of CTIPe, TIE-GCM, the ionospheric electrodynamics solvers of the SWMF, LFM and OpenGGCM magnetosphere-ionosphere coupled models, and the Weimer electric field model. The online metrics analysis tool at the Community Coordinated Modeling Center (CCMC) has been updated to handle the analysis of separate short segments of available data (high-latitude sections of the satellite orbit) with model outputs to analyze how well auroral patterns are being reproduced by the models. We present initial results from the new analysis tool in terms of model yields (ratio of the difference between maximum and minimum values of model results to the observation), timing/location errors of local maxima in the inbound and outbound auroral crossings as well as cross-correlations for individual passes. We collect the information for many DMSP passes and present an analysis for model performance during quiet and geomagnetically disturbed time periods using half-orbit integrated values as well.
Document ID
20110020802
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Rastaetter, Lutz
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kuznetsova, Maria
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shim, Ja-Soon
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hesse, Michael
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Knipp, Delores J.
(National Center for Atmospheric Research Boulder, CO, United States)
Weimer, Daniel R.
(Virginia Tech Blacksburg, VA, United States)
Fuller-Rowell, Timothy J.
(Colorado Univ. Boulder, CO, United States)
Ridley, Aaron J.
(Michigan Univ. Ann Arbor, MI, United States)
Raeder, Joachim
(New Hampshire Univ. Durham, NH, United States)
Maruyama, Naomi
(Colorado Univ. Boulder, CO, United States)
Kilcomons, Liam
(National Center for Atmospheric Research Boulder, CO, United States)
Wittberger, Michael James
(National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 25, 2013
Publication Date
December 5, 2011
Subject Category
Geophysics
Report/Patent Number
GSFC.ABS.5104.2011
Meeting Information
Meeting: American Geophysical Union (AGU) 2011 Fall Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 5, 2011
End Date: December 8, 2011
Distribution Limits
Public
Copyright
Other

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