Last Updated: 09/22/2022

GEM-CEDAR

Summary

The CEDAR-GEM Challenge was initiated during the Summer 2011 Joint CEDAR-GEM Workshop and is build upon GEM GGCM and CEDAR ETI Challenges. The project focuses on various scientific and operational aspects of magnetosphere and ionosphere models performance and addresses challenges of model-data comparisons and metrics studies (e.g., model output and observational time series preparation for comparison, measurement uncertainty, metrics selection). A list of selected events, lists of physical parameters and available measurements, model output file formats for each metrics study, and submission instructions can be found here.

Main Focuses

Model Validation Projects

  • Poynting flux/Joule heating
    • Poynting Flux along the DMSP-15 satellite track
    • Publications
      • Rastätter L., et al. (2016), GEM-CEDAR challenge: Poynting flux at DMSP and modeled Joule heat, Space Weather, 14, 113–135, doi:10.1002/2015SW001238.
  • TEC
    • Global TEC Study
      • Selected Regions:
        • Eight longitude sectors:
          • 5 deg. geographic longitude sectors 025-030, 090-095, 140-145, 175-180, 200-205, 250-255, 285-290, 345-350 Each longitude has 36 latitude bins of 5 degrees each from -90 to +90.
      • Selected Events:
        • 2006 Dec. event (2006/12/13 (doy 347) 00:00 UT - 12/16 (doy 350) 00:00 UT)
    • Reginal TEC Study
      • Selected Regions:
        • North American Sector
        • European Sector
      • Selected Events:
        • 2006 Dec. event (2006/12/13 (doy 347) 00:00 UT - 12/16 (doy 350) 00:00 UT)
        • 2013 Mar. event (2013/03/16 (doy 075) 00:00 UT - 03/20 (doy 079) 00:00 UT)
  • Neutral density/Satellite drag
  • foF2/NmF2 Metrics Study:
    • Selected Events:
    • Selected Stations:
      • Boulder (40.0°N, 254.7°E)
      • Millstone Hill (42.6°N, 288.5°E)
      • Wallops Is (37.9°N, 284.5°E)
      • Ebre (40.8°N, 0.5°E)

Quantification of the storm effects on Ionosphere-Thermosphere

Uncertainty and sensitivity analysis

TBD

Role of drivers

Climatology Assessment of Ionosphere/Thermosphere Models

TBD

Information about the Study

Selected Events

GEM Events

E.2006.348: 2006/12/14 (doy 348) 12:00 UT - 12/16 00:00 UT
2006/12/13 (doy 347) 00:00 UT - 12/16 00:00 UT - for global electron density study (TEC, NmF2 and HmF2)
E.2001.243: 2001/08/31 (doy 243) 00:00 UT - 09/01 00:00 UT
E.2005.243: 2005/08/31 (doy 243) 10:00 UT - 09/01 12:00 UT
E.2005.135: 2005/05/15 (doy 135) 00:00 UT - 05/16 00:00 UT
E.2005.190: 2005/07/09 (doy 190) 00:00 UT - 07/12 00:00 UT
E.2003.302: 2003/10/29 (doy 302) 06:00 UT - 10/30 06:00 UT (optional)
E.2010.095: 2010/04/05 (doy 095) 00:00 UT - 2010/04/06 00:00 UT
E.2011.217: 2011/08/05 (doy 217) 09:00 UT - 2011/08/06 09:00 UT

CEDAR Events

E.2006.348: 2006/12/14 (doy 348) 12:00 UT - 12/16 (doy 350) 00:00 UT
2006/12/13 (doy 347) 00:00 UT - 12/16 (doy 350) 00:00 UT - for global electron density study (TEC, NmF2 and HmF2) (GEM event 2)
E.2001.243: 2001/08/31(doy 243) 00:00 UT - 09/01 (doy 244) 00:00 UT (GEM event 3)
E.2005.243: 2005/08/31 (doy 243) 10:00 UT - 09/01 (doy 244) 12:00 UT (GEM event 4)
E.2007.091: 2007/04/01 (doy 091) 00:00 UT - 04/02 (doy 092) 12:00 UT
E.2007.142: 2007/05/22 (doy 142) 12:00 UT - 05/25 (doy 145) 00:00 UT
E.2008.059: 2008/02/28 (doy 059) 12:00 UT - 03/01 (doy 061) 12:00 UT
E.2007.079: 2007/03/20 (doy 079) 00:00 UT - 03/22 (doy 081) 00:00 UT
E.2007.190: 2007/07/09 (doy 190) 00:00 UT - 07/10 (doy 191) 00:00 UT
E.2007.341: 2007/12/07 (doy 341) 00:00 UT - 12/09 (doy 343) 00:00 UT

Recent Events

03/08 - 03/11, 2012
07/14 - 07/20, 2012

Selected Physical Parameters

Ionosphere/Thermosphere models or coupled model components:

  • Global Electron Density (newly added):
    • TEC from ground-based GPS in eight 5° geographic longitude sectors
    • NmF2 from COSMIC in eight 5° geographic longitude sectors
    • hmF2 from COSMIC in eight 5° geographic longitude sectors
  • Vertical and horizontal drifts at Jicamarca (VperpN and VperpE)
  • Neutral density at CHAMP orbit (Nden)
  • Electron density at CHAMP orbit (Eden)
  • NmF2 from LEO satellites (CHAMP and COSMIC) and ISRs
  • HmF2 from LEO satellites (CHAMP and COSMIC) and ISRs
  • Temperature Tn obtained by Fabry-Perot Spectrometer at 250 km (Arrival height, Antarctica; Resolute Bay, Canada)
  • Neutral winds obtained by Fabry-Perot Spectrometer at 250 km (Arrival height, Antarctica; Resolute Bay, Canada)
  • Ne at 300 km (Millstone Hill, Sondrestrom, EISCAT, Svalbard ISRs).
  • Te at 300 km (Millstone Hill, Sondrestrom, EISCAT, Svalbard ISRs).
  • Ti at 300 km (Millstone Hill, Sondrestrom, EISCAT, Svalbard ISRs).
  • Ion vertical velocity at Sonderstrom ISR

Geospace models or coupled model components:

Parameters along DMSP tracks

  • Poynting flux (Joule heating) into ionosphere along DMSP tracks
  • Plasma Velocity (Vx - along track, Vy cross track, Vz - vertical)

Additional time series in support of simulations results analysis

  • Cross polar cap potential (northern and southern hemisphere)
  • Joule heating (or Poynting flux) integrated over each hemisphere in GW.

Ionosphere: Available Measurements/Stations/Locations

Notes: the links below contain no data - only trajectories/locations.

VperpN/VperpENdenEdenNmF2HmF2TnUn/Vn/WnNe300Te300Ti300Wi300TEC/NmF2/HmF2
E.2006.348JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 Millstone_HillCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 Millstone_HillResolute_Bay_E Resolute_Bay_N Resolute_Bay_S Resolute_Bay_W Resolute_Bay_ZResolute_Bay_E Resolute_Bay_N Resolute_Bay_S Resolute_Bay_W Resolute_Bay_ZMillstone_Hill EISCAT-Svalbard EISCAT SondrestromMillstone_Hill EISCAT-Svalbard EISCAT SondrestromMillstone_Hill EISCAT-Svalbard EISCAT SondrestromSondrestrom5 deg. geographic longitude sectors: 025-030, 090-095, 140-145, 175-180, 200-205, 250-255, 285-290, 345-350. Each longitude has 36 latitude bins of 5 degrees each from -90 to +90.
E.2001.243JicamarcaCHAMPCHAMPNo Data AvailableNo Data Available
E.2005.243JicamarcaCHAMPCHAMPCHAMP Millsone_HillCHAMP Millsone_Hill
E.2005.135CHAMPCHAMPCHAMPCHAMPSondrestromSondrestromSondrestromSondrestrom
E.2005.190CHAMPCHAMPCHAMPCHAMPArrival_Heights_E Arrival_Heights_N Arrival_Heights_S Arrival_Heights_W Arrival_Heights_ZArrival_Heights_E Arrival_Heights_N Arrival_Heights_S Arrival_Heights_W Arrival_Heights_Z
E.2007.091JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 COSMIC6 EISCAT-Svalbard Poker_FlatCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 COSMIC6 EISCAT-Svalbard Poker_Flat
E.2007.142JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 COSMIC6 Millstone_Hill EISCAT-Svalbard Poker_Flat SondrestromCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC5 COSMIC6 Millstone_Hill EISCAT-Svalbard Poker_Flat Sondrestrom
E.2008.059JicamarcaCHAMPCHAMPCHAMP COSMIC2 COSMIC3 COSMIC4 COSMIC6 Millstone_Hill SondrestromCHAMP COSMIC2 COSMIC3 COSMIC4 COSMIC6 Millstone_Hill Sondrestrom
E.2007.079JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC5 COSMIC6 EISCAT-Svalbard Poker_Flat SondrestromCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC5 COSMIC6 EISCAT-Svalbard Poker_Flat Sondrestrom
E.2007.190JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC4 COSMIC6 EISCAT-SvalbardCHAMP COSMIC1 COSMIC2 COSMIC4 COSMIC6 EISCAT-Svalbard
E.2007.341JicamarcaCHAMPCHAMPCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC6 Millstone_Hill Poker_Flat SondrestromCHAMP COSMIC1 COSMIC2 COSMIC3 COSMIC4 COSMIC6 Millstone_Hill Poker_Flat Sondrestrom

Magnetosphere: Available Measurements/Stations/Locations

Notes: the links below contain no data - only trajectories/locations.

EventMagn. field at geosync. orbitGround magn. perturb'sDSTAuroral ovalPoynting fluxPlasma velocity
E.2006.348GOES11 GOES12ABK FRD FRN FUR HRN IQA MEA NEW OTT PBQ WNG YKCDMSPDMSP
E.2001.243GOES08 GOES10ABK FRD FRN FUR IQA MEA NEW OTT PBQ WNG YKCDMSPDMSP
E.2005.243GOES10 GOES12ABK FRD FRN FUR HRN MEA NEW OTT PBQ WNG YKCDMSPDMSP
E.2005.135GOES12 GOES11ABK FRD FRN FUR HRN IQA MEA NEW OTT PBQ WNG YKCDMSPDMSP
E.2005.190GOES12 GOES11ABK FRD FRN FUR HRN IQA MEA NEW OTT PBQ WNG YKCDMSPDMSP
E.2003.302GOES10 GOES12ABK FRD FRN FUR HRN IQA MEA NEW OTT PBQ WNG YKCDMSPDMSP

Model Output File Format Description

Model output files should be in ASCII text format. Each file size should not exceed 1Mb. Full path name to the input file at your local disk should not contain any blank spaces or quotation marks. On DOS/Windows systems the recommended extension for the input file name is "txt".

The following file formats for model outputs for different physical parameters studies are expected:

See file format description for Ionosphere/Thermosphere models or coupled model components

See file format description for Magnetosphere models or coupled model components

Submission Instructions (submission is not available any more)

Determine the Model Setting

Check if the model setting is already registered with the CCMC. If not, submit your NEW model setting on the challenge website.

File Formats

Please check file formats for model outputs before you proceed with their submission.

For ALL studies EXCEPT global TEC, NmF2, hmF2

Submit the model results for this model setting on the challenge website.

For global TEC, NmF2 and/or hmF2 studies only

Please upload the model results to CCMC's anonymous ftp server (hanna.ccmc.gsfc.nasa.gov), into the subdirectory with the name of your model setting.

E.g., for model setting N_MODELNAME you should upload files into subdirectory:
pub/GEM-CEDAR/in/E.2006.347-2006.349/TEC/N_ModelName
pub/GEM-CEDAR/in/E.2006.347-2006.349/NmF2/N_ModelName
pub/GEM-CEDAR/in/E.2006.347-2006.349/hmF2/N_ModelName

For example:
ftp anonymous@hanna.ccmc.gsfc.nasa.gov
cd pub/GEM-CEDAR/in/E.2006.347-2006.349/hmF2/N_ModelName
put command should upload the files.

Model output file naming convention

  • Name of model output files to be submitted should follow the specific format shown below:
    PhysicalParameter_Location_ModelSetting_StartYear.StartDoyOfTheEvent-EndYear.EndDoyOfTheEvent.txtFor example: TEC_lon_025_1_CTIPE_2006.347-2006.349.txt
    • TEC: physical parameter which can be NmF2 or hmF2
    • lon_025: location which is positive 3 digit longitude (first longitude of the bin)
    • 1_CTIPE: model setting ID
    • 2006.347: start year (4 digits).start doy (3 digits)of the event
    • 2006.349: end year (4 digits).end doy (3 digits) of the event
  • Each model output file should include data for whole three days of the event at a given longitude (one of selected eight longitude slices: 025-030, 090-095, 140-145, 175-180, 200-205, 250-255, 285-290, 345-350)

Simulation Results Analysis Tools

View Ionosphere/Thermosphere Results via the Time-series Plotting Tool

See Table

View Magnetosphere Results via the Time-series Plotting Tool

See Table

List of Runs for the ionosphere/thermosphere studies performed at the CCMC

See Table

List of Runs for the magnetosphere studies performed at the CCMC

See Table

Challenge Status

GEM Modeling Challenge Status

See Table

CDAR-ETI and GEM-CEDAR Modeling Challenge Status

See Table

Presentations

CEDAR-GEM Modeling Challenge Meeting at the 2017 CEDAR Workshop

CEDAR-GEM Modeling Challenge meeting at the 2016 GEM min-Workshop:

GSM Modeling Methods and Validation at the 2016 GEM min-Workshop:

CEDAR-GEM Modeling Challenge meeting at the 2016 Joint GEM-CEDAR Workshop:

CEDAR-GEM Modeling Challenge meeting at the 2015 GEM Mini-Workshop:

Metrics and validation of TEC in large geographical areas:

Uncertainty and sensitivity analysis:

Modeling Challenges in auroral region:

CEDAR-GEM Modeling Challenge meeting at the 2015 CEDAR Workshop:

CEDAR-GEM Modeling Challenge meeting at the 2014 GEM Mini-Workshop:

Modeling challenges in auroral region:

Modeling challenges in TEC and neutral density:

CEDAR-GEM Challenge Meeting at the 2014 CEDAR Workshop

CEDAR-GEM Challenge meeting at the 2014 Space Weather Workshop:

CEDAR-GEM Challenge meeting at the 2013 GEM Mini-Workshop:

Introduction: Masha Kuznetsova [PDF]
Quantifying the storm enery input:

Role of drivers on IT model results:

Build-up of plasma and structure at mid-latitudes:

Onset/timing/evolution of neutral composition change:

Model-data comparison for high inclination and polar orbiting satellite:

CEDAR-GEM Challenge meeting at the 2013 CEDAR Workshop:

CEDAR-GEM Challenge meeting at the 2013 Space Weather Workshop:

CEDAR-GEM mini workshop at the AGU 2012 Fall Meeting:

Presentations from CEDAR Workshop 2012 (Santa Fe, NM)

CEDAR-GEM mini workshop at the AGU 2011 Fall Meeting:

CEDAR-GEM 2011 Summer Workshop:

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