2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalOutput/ICON/TIEGCM/L4/PT60M NASA NumericalOutput Ionospheric Connection Explorer (ICON) Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) Model Product Version 2 ICON TIEGCM Model Products https://doi.org/10.48322/w25t-d375 2026-02-02T13:10:56Z 2024-09-25T00:00:00Z Created Numerical metadata. JMW 2025-02-06T00:00:00Z Updated metadata to version 2.7.0. Added DOI. JMW 2026-02-02T13:10:56Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) L4-3 with Hough Mode Extension (HME) forcing. These metadtaa include both the model input data and model output data. National Aeronautics and Space Administration; Dr. Astrid Maute; Dr. Thomas J. Immel Maute, A. 2025-01-01T00:00:00 NASA Space Physics Data Facility National Aeronautics and Space Administration Explorers Program contracts NNG12FA45C National Aeronautics and Space Administration Explorers Program contracts NNG12FA42I spase://SMWG/Person/Astrid.Maute CoInvestigator spase://SMWG/Person/James.M.Weygand MetadataContact Additional information on ICON https://icon.ssl.berkeley.edu/ ICON spacecraft Homepage. Thermosphere-Ionosphere-Electrodynamics GeneralCirculation Model for the Ionospheric Connection Explorer: TIEGCM-ICON https://doi.org/10.1007/s11214-017-0330-3 Space Science Reviews, {2017) 212:523–551 DOI 10.1007/s11214-017-0330-3 spase://SMWG/Repository/NASA/GSFC/SPDF Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/icon/l4/tiegcm/ Access to ICON TIEGCM L4 data at the Space Physics Data Facility (SPDF) NetCDF spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products HTTPS from CDAWeb https://cdaweb.gsfc.nasa.gov/pub/data/icon/l4/tiegcm/ Access to ICON TIEGCM L4 data at Coordinated Data Analysis Web (CDAWeb) Data Services NetCDF ValueAdded ICON TIEGCM team ValueAdded 2 IonComposition NeutralGas 2019-12-21T00:00:00Z 2022-11-10T23:59:59Z PT60M Earth.NearSurface.Atmosphere Earth.NearSurface.AuroralRegion Earth.NearSurface.EquatorialRegion Earth.NearSurface.Ionosphere Total Density DEN Total neutral density. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M g/cm^3 1e+36 Atom Molecule MassDensity Eastward Electric Field ED12D E_d1 see Richmond (1995) at 90km (magnetic eastward direction). This is a 3 dimensional array: 81x97x24. The dimensions are based on the size of the arrays (81x97x24): mlon, mlat, and time. PT60M V/m 1e+36 Array Electric Equatorward Electric Field ED22D Ed2 see Richmond (1995) at 90km (down-/equatorward direction). This is a 3 dimensional array: 81x97x24. The dimensions are based on the size of the arrays (81x97x24): mlon, mlat, and time. PT60M V/m 1e+36 Array Electric Geographic Eastward Electric Field EEX Geographic eastward electric field on geographic grid. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M V/cm 1e+36 Array Electric Geographic Northward Electric Field EEY Geographic northward electric field on geographic grid. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M V/cm 1e+36 Array Electric Geographic Upward Electric Field EEZ Geographic northward upward field on geographic grid. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M V/cm 1e+36 Array Electric Helium HE Helium Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Atom MassMixingRatio Mass Kp index Kp Kp index. PT60M Magnitude Other Lower Boundary Condition LBC Interface level of t,u,v lower boundary condition. Other N2: Molecular Nitrogen N2 N2: Molecular Nitrogen. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Molecule Ratio Mass N(4S) N4S N(4S) Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Atom MassMixingRatio Mass Electron Density NE Electron density. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm^-3 1e+36 Electron Array NumberDensity Nitric Oxide NO Nitric Oxide Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Molecule MassMixingRatio Mass Atomic Oxygen O1 Atomic oxygen Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Atom MassMixingRatio Mass Neutral Molecule Oxygen O2 Neutral molecule oxygen Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M mmr 1e+36 Molecule MassMixingRatio Mass Molecule Oxygen Ion O2P O2+ ion Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M cm^-3 1e+36 Molecule MassMixingRatio NumberDensity Atomic Oxygen Ion OP O+ ion Mass mixing ratio. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M cm^-3 1e+36 Ion MassMixingRatio NumberDensity Two Dimensinal Electric Potential PHIM2D PHIM2D: 2d Electric Potential at 90 km on magnetic grid. This is a 3 dimensional array: 81x97x24. The dimensions are based on the size of the arrays (81x97x24): mlon, mlat, and time. PT60M V 1e+36 Array Potential Prescribed High Latitude Potential PHIMW Prescribed high latitude potential (for L4.3 Weimer potential). This is a 3 dimensional array: 81x97x24. The dimensions are based on the size of the arrays (81x97x24): mlon, mlat, and time. PT60M V 1e+36 Array Potential Electric Potential POTEN Electric potential. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M V 1e+36 Array Potential Aurora Ionization Rate QAURORA Aurora ionization rate. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M cm^-3 s^-1 1e+36 Other Joule Heating QJOULE Joule heating. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M erg g^-1 s^-1 1e+36 Other Height-Integrated Joule Heating QJOULE_INTEG Height-integrated joule heating. This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M erg cm^-2 s^-1 1e+36 Other Hall Conductivity SIGMA_HAL Hall Conductivity. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M S/m 1e+36 Other Pedersen Conductivity SIGMA_PED Pedersen Conductivity. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M S/m 1e+36 Other Electron Temperature TE Electron Temperature. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M K 1e+36 Electron Array Temperature Ion Temperature TI Ion Temperature. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M K 1e+36 Ion Array Temperature Lower boundary condition of Neutral temperature TLBC Lower boundary condition of Neutral temperature. This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M K 1e+36 Atom Molecule Array Temperature Lower boundary condition of Neutral temperature (previous timestep) TLBC_NM Lower boundary condition of Neutral temperature (previous timestep). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M K 1e+36 Atom Molecule Array Temperature Neutral Temperature TN Neutral Temperature. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, lev, and time. PT60M K 1e+36 Atom Molecule Array Temperature Zonal ExB Velocity UI_ExB UI: Zonal ExB Velocity (geographic eastward). This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm/s 1e+36 Ion Array FlowSpeed Lower boundary condition of zonal neutral wind ULBC Lower boundary condition of Zonal neutral wind (UN). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Lower boundary condition of zonal neutral wind (previous timestep) ULBC_NM Lower boundary condition of Zonal neutral wind (UN) (previous timestep). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Neutral Zonal Wind (+EAST) UN Neutral zonal wind (+East). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Meridional ExB Velocity VI_ExB VI: Meridional (geographic northward) ExB Velocity. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm/s 1e+36 Ion Array FlowSpeed Lower boundary condition of Meridional neutral wind VLBC Lower boundary condition of meridional neutral wind (VN). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Lower boundary condition of meridional neutral wind (previous timestep) VLBC_NM Lower boundary condition of meridional neutral wind (VN) (previous timestep). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Neutral Meridional Wind (+EAST) VN Neutral meridional wind (+north). This is a 3 dimensional array: 144x72x24. The dimensions are based on the size of the arrays (144x72x24): lon, lat, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Vertical ExB Velocity WI_ExB WI: Vertical (geographic Upward) ExB Velocity. This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm/s 1e+36 Ion Array FlowSpeed Neutral Vertical Wind WN Upward neutral wind (plus up) (note that the vertical dimension is using ilev). This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm/s 1e+36 Atom Molecule Array FlowSpeed Geopotential Height Z Geopotential height (used in the code with constant gravity). This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm 1e+36 Other Geometric Height ZG ZG Geometric height (just postprocessing with variable gravity). This is a 4 dimensional array: 144x72x57x24. The dimensions are based on the size of the arrays (144x72x57x24): lon, lat, ilev, and time. PT60M cm 1e+36 Other Geopotential height on magnetic grid ZMAG Geopotential height (constant gravity) on magnetic grid. This is a 4 dimensional array: 81x97x63x24. The dimensions are based on the size of the arrays (81x97x63x24): mlon, mlat, imlev, and time. PT60M cm 1e+36 Other Lower magnetic auroral activity index al Lower magnetic auroral activity index. PT60M nT Array Magnetic Characteristic Maxwellian energy of polar cusp electrons alfac Characteristic Maxwellian energy of polar cusp electrons. PT60M keV Electron Array Energy Characteristic Maxwellian energy of drizzle electrons alfad Characteristic Maxwellian energy of drizzle electrons. PT60M keV Electron Array Energy AMIE NH data file amienh_ncfile AMIE northern hemisphere data file that contains potential,energy flux, mean energy. This is a 2 dimensional array: 1024x24. PT60M Other AMIE SH data file amiesh_ncfile AMIE southern hemisphere data file that contains potential,energy flux, mean energy. This is a 2 dimensional array: 1024x24. PT60M Other Background LBC data file bgrddata_ncfile background lbc data file (for L4.3 based on HWM07 and MSISE00) that contains T,U,Z. This is a 2 dimensional array: 1024x24. PT60M Other BX component of Interplanetary Magnetic Field bximf GSM BX component of IMF. PT60M nT Array Magnetic BY component of Interplanetary Magnetic Field byimf GSM BY component of IMF. PT60M nT Array Magnetic BZ component of Interplanetary Magnetic Field bzimf GSM BZ component of IMF. PT60M nT Array Magnetic Calendar advance flag calendar_advance Calendar advance flag (1 if advancing calendar time), which means the model is advancing with time with realistic Kp and F10.7. PT60M Other Ion/neutral collision factor colfac ion/neutral (O-O+) collision factor PT60M Other CISM/CMIT coupling flag coupled_cmit 1 if coupled with Center for Integrated Space Weather Modeling (CISM)/Coupled Magnetospherer-Ionosphere-Thermosphere (CMIT), 0 otherwise PT60M Other Critical cross-over latitude 1 crit1 cross over latitude (co-latitude) from high to mid-latitude 1 PT60M deg Positional Critical cross-over latitude 2 crit2 cross over latitude (co-latitude) from high to mid-latitude 2 PT60M deg Positional CTMT LBC data file ctmt_ncfile CTMT LBC data file. This is a 2 dimensional array: 1024x24. PT60M Other Cross-tail potential ctpoten Cross-tail potential. PT60M kV Array Potential Calendar day day Calendar day. PT60M Temporal Amplitude and phase of diurnal tide mode dtide Amplitude and phase of diurnal tide mode (1,1). This is a 2 dimensional array: 2x24. The dimensions are based on the size of the arrays (2x24): dtidedim,time. PT60M Other Peak energy flux in noon sector of the aurora e1 Peak energy flux in noon sector of the aurora. PT60M ergs cm^-2 s^-1 Other Peak energy flux in midnight sector of the aurora e2 Peak energy flux in midnight sector of the aurora. PT60M ergs cm^-2 s^-1 Other Column energy input of polar cusp electrons ec Column energy input of polar cusp electrons. PT60M ergs cm^-2 s^-1 Electron Array EnergyFlux Column energy input of drizzle electrons ed Column energy input of drizzle electrons. PT60M ergs cm^-2 s^-1 Electron Array EnergyFlux 81-day average 10.7 cm solar flux f107a 81-day average 10.7 cm solar flux. PT60M 1.e-22 W m^-2 Hz^-1 Electromagnetic Array EnergyFlux Daily 10.7 cm solar flux f107d Daily 10.7 cm solar flux. PT60M 1.e-22 W m^-2 Hz^-1 Electromagnetic Array EnergyFlux Geophysical Indices data file gpi_ncfile Geophysical Indices data file, which contains Kp, f107, f107a, ctpoten, and power. If the name list variable GPI_NCFILE uses “ICON_Ancillary_GPI” a 7-73 day averaging in F107a is used otherwise the averaging is centered on the day. This is a 2 dimensional array: 1024x24. PT60M Other Gravitational Acceleration grav gravitational acceleration, which is a constant used in the model, independent of height. Also see see global attribute for formula). PT60M cm s^-2 Other Global Scale Wave Model migrating diurnal tides data file gswm_mi_di_ncfile Global Scale Wave Model (GSWM) migrating diurnal tides data file. The lower boundary perturbations for TN, UN, VN, and Z. This is a 2 dimensional array: 1024x24. PT60M Other Global Scale Wave Model migrating semi-diurnal tides data file gswm_mi_sdi_ncfile Global Scale Wave Model (GSWM) migrating semi-diurnal tides data file. The lower boundary perturbations for TN, UN, VN, and Z. This is a 2 dimensional array: 1024x24. PT60M Other Global Scale Wave Model non-migrating diurnal tides data file gswm_nm_di_ncfile Global Scale Wave Model (GSWM) non-migrating diurnal tides data file. The lower boundary perturbations for TN, UN, VN, and Z. This is a 2 dimensional array: 1024x24. PT60M Other Global Scale Wave Model non-migrating semi-diurnal tides data file gswm_nm_sdi_ncfile Global Scale Wave Model (GSWM) non-migrating semi-diurnal tides data file. The lower boundary perturbations for TN, UN, VN, and Z. This is a 2 dimensional array: 1024x24. PT60M Other Gaussian half-width of the noon auroral oval h1 Gaussian half-width of the noon auroral oval. PT60M degrees Other Gaussian half-width of the midnight auroral oval h2 Gaussian half-width of the midnight auroral oval. PT60M degrees Other HME file hme_ncfile HME file used for lower boundary perturbation. This is a 2 dimensional array: 1024x24. PT60M Other Hemispheric power hpower Hemispheric power. PT60M GW Other Interface pressure coordinate ilev Interface levels. ln(p0/p). Atmosphere ln pressure coordinate. p(k) = p0 * exp(-ilev(k)) Other Interplanetary Magnetic Field Data file imf_ncfile IMF data file. GSM Bx, GSM By, GSM Bz, Swvel, Swden, Kp, f107, and f107a. This is a 2 dimensional array: 1024x24. PT60M Other Magnetic Interface Pressure Coordinate imlev Magnetic interface levels. ln(p0/p). Atmosphere ln pressure coordinate. p(k) = p0 * exp(-imlev(k)) Other Number of Time Steps from Model Time iter number of time steps from model time 0,0,0. PT60M Other Joule Heating Factor joulefac Joule heating factor. PT60M Other Geographic Latitude lat Geographic latitude (-south, +north). PT60M degrees Positional Midpoint Pressure Coordinate lev Midpoint levels. ln(p0/p). Atmosphere ln pressure coordinate. p(k) = p0 * exp(-lev(k)) Other Geographic Longitude lon Geographic longitude (-west, +east). PT60M degrees Positional Geographic Latitutde and Longitude coordinates of S,N magnetic poles mag Geographic lat and lon coordinates of S,N magnetic poles. PT60M degrees Positional Magnetic Latitude mlat Magnetic latitude (-south, +north). PT60M degrees Positional Magnetic Midpoint Levels imlev Magnetic midpoint levels. ln(p0/p). Atmosphere ln pressure coordinate. p(k) = p0 * exp(-mlev(k)) Other Magnetic Longitude mlon Magnetic longitude (-west, +east). PT60M degrees Positional Model Times (day, hour, minute) mtime Model times (day, hour, minute). PT60M 3 model times (day, hour, minute) day 1 day hour 2 hour minute 3 minute Temporal NCEP Data File ncep_ncfile NCEP data file. 10 mb lower boundary for TN and Z. This is a 2 dimensional array: 1024x24. PT60M Other Number of MPI tasks ntask_mpi Number of MPI tasks. PT60M Other Reference pressure p0 Reference pressure. millibars Other Reference pressure (as used by the model) p0_model Reference pressure (as used by the model). microbars Other SABER Lower Boundary Condition data file saber_ncfile SABER lbc data file (T,Z). This is a 2 dimensional array: 1024x24. PT60M Other Amplitudes and Phases of semi-diurnal tide sdtide Amplitudes and phases of semi-diurnal tide. This is a 2 dimensional array: 1024x24. PT60M Other TIMED SEE data file see_ncfile TIMED SEE data file. This is a 2 dimensional array: 1024x24. PT60M Other Solar Wind Density swden Solar wind density. PT60M cm^-3 Ion NumberDensity Solar Wind Velocity swvel Solar Wind Velocity. PT60M km/s Ion FlowSpeed TGCMLB file tgcmlb_ncfile TIEGCM lower boundary file used for lower boundary perturbation. This is a 2 dimensional array: 1024x24. PT60M Other TIDI Lower Boundary Conditions Data File tidi_ncfile TIDI lower boundary conditions data file. This is a 2 dimensional array: 1024x24. PT60M Other Time time Time minutes since an initial start. PT60M minutes Temporal Time Step timestep Timestep size. PT60M seconds Temporal Universal Time ut Universal time (from model time hour and minute). PT60M hours Temporal Write Time Date and History write_date Date and time each history was written. PT60M Temporal Calendar Year year Calendar year. PT60M Temporal