2010 Workshop:CEDAR ETI Challenge

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CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge.

Location, Date/Time and Duration

2 hours


M. Kuznetsova
J,S Shim
B, Emery
A. Ridley
J. Lei

Workshop Categories

Altitudes: IT - Latitudes: global - Inst/Model: modeling - Other: model - data comparisons

Format of the Workshop

Round Table

Estimated attendance


Conflicts with other workshops or Requested Specific Days

Possible conflict with GEM Workshop

Special technology requests


CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge was initiated at the 2009 CEDAR workshop. The goal of the CEDAR Challenge is to help to evaluate the current state of the ionosphere/thermosphere models, to track model improvements over time, and to facilitate interaction between research and operation communities in developing metrics for space weather model evaluations. The Community Coordinated Modeling Center (CCMC) at the Goddard Space Flight Center is supporting the activity using their experience with the GEM community and the CCMC available interface. The time intervals, physical parameters, and observational data for the Challenge selected at the first CETI Workshop are available at the 2009 CEDAR Workshop webpage (http://cedarweb.hao.ucar.edu/wiki/index.php/2009_Workshop:CEDAR_ETI_Challenge) and at CCMC (http://ccmc.gsfc.nasa.gov). The CEDAR community chose a ‘year’ of incoherent scatter radar (ISR) observations from 07060-08091, and also signed on for the 4 GEM storm intervals in of 01243, 03302-03303, 05243-05244 and 06348-06349, where the 2001, 2005 and 2006 periods will be emphasized. CCMC has developed a model output submission interface at http://ccmc.gsfc.nasa.gov/support/CETI2010/events_studies.php. This will also the model output archive, and an on-line visualization tool for timeline comparisons of Jicamarca vertical ion drifts, CHAMP neutral densities at 400km, TEC, and NmF2 and hmF2 from COSMIC. At the second Workshop we will review the progress so far and make plans for further action. We will discuss the outcome of the preliminary round of model output comparisons, and revisit the list of physical parameters, time intervals and observations to be used for comparison. Methods of data preparation for comparison, such as global GPS TEC, need to be addressed. To analyze the effects of the geospace environment on the ionosphere, we wish to involve GEM Community. Many of the magnetospheric models are coupled to ionosphere-thermosphere models, so that the metrics can be conducted for both coupled and uncoupled simulations on both models. For this purpose we need to select a few intervals of moderate solar activity overlapping with CEDAR climatology project. Some dates are suggested on the website in the report at the 2009 Workshop. This activity is especially relevant due to upcoming joint GEM-CEDAR Workshop in 2011.


Selected speakers are:

Discussion Topics

Selected discussion topics are:

  • What metric(s) should be used for model comparisons? What formula(e) should be used for skill score calculations? Should there be any type of threshold-based/utility metrics especially for storm modeling?
  • Should modelers and the CCMC run the entire climatology 'year' (13-months from March 2007 through March 2008) for all models and make all model output available for the entire year? If so, what parameters?
  • How do we utilize global TEC data? Should we pick a few representative stations/points or utilize the entire 2D grid? Should we accept submission of 2D timelines? How do we visualize the comparison for 2D timelines?
  • How do we utilize 2D electron density profiles in height from COSMIC or selected ISR stations that cover various parts of the globe, and so are nearly 3D in nature?
  • Formulate projects for a possible joint CEDAR-GEM Challenge. For example:
    • Comparison of different approaches to introducing geomagnetic activity effects into ionosphere models.
    • Role of models for ionosphere potential patterns.
    • Role of heat flux into the ionosphere.
    • Role of ion outflows from the ionosphere to the magnetosphere.
    • etc.

Workshop Summary

This is where the final summary workshop report will be.

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