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Share sensitive information only on official, secure websites. HDPWS Data Access HAPI: CDAWeb HAPI Server HTTPS from SPDF CDAWeb WebService: CDAWeb Programmatic Data Access ICON The Far Ultra Violet Imaging Spectrograph Nightside Images var authors='Kamalabadi, F.'; document.write(authors); (2023). ICON The Far Ultra Violet Imaging Spectrograph Nightside Images . [Data set]. Space Physics Data Facility. https://doi.org/10.48322/4vx2-1c67. Accessed on document.write(currentDateStr);. Note: Proper references, including Copy BibTeX Citation or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication. ResourceID spase://NASA/NumericalData/ICON/FUV/L2/Night/PT12S Description The FUV instrument takes 2D images of the Earth’s horizon in the Far ultraviolet. The imager is pointing approximately 90 degrees to the spacecraft motion, similar to looking out of the side window of a car as it drives down the road. Onboard electronics read the image 8 times per second and perform Time Delay Integration (TDI) to remove the motion-blur from the images. A turret is used to steer the field of view of the instrument left to right to ensure it always looks along the magnetic meridian (towards the magnetic pole). Metadata Rights CC0-1.0: Creative Commons Zero v1.0 Universal Note CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license. View XML | Edit Details Version:2.7.1 NumericalData ResourceID spase://NASA/NumericalData/ICON/FUV/L2/Night/PT12S NamingAuthority NASA ResourceType NumericalData ResourceHeader ResourceName ICON The Far Ultra Violet Imaging Spectrograph Nightside Images AlternateName FUV Nightside Images DOI https://doi.org/10.48322/4vx2-1c67 ReleaseDate 2026-07-21 12:05:18Z RevisionHistory RevisionEvent ReleaseDate 2023-08-01 00:00:00Z Note Added DOI and PublicationInfo minted by JMW on 20230801. Updated SPASE version. RevisionEvent ReleaseDate 2024-05-02 00:00:00Z Note Updated SPASE version. Edited AccessInformation. JMW RevisionEvent ReleaseDate 2025-10-02 15:11:59Z Note Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB RevisionEvent ReleaseDate 2025-12-04 13:29:31Z Note Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB RevisionEvent ReleaseDate 2026-06-26 13:17:46Z Note Add 'Z' to PublicationDate. ZCB RevisionEvent ReleaseDate 2026-07-21 12:05:18Z Note Added HelioData InformationURL. JMW RevisionEvent ReleaseDate 2026-08-26 14:22:18Z Note Revised StopDate. JMW Description The FUV instrument takes 2D images of the Earth’s horizon in the Far ultraviolet. The imager is pointing approximately 90 degrees to the spacecraft motion, similar to looking out of the side window of a car as it drives down the road. Onboard electronics read the image 8 times per second and perform Time Delay Integration (TDI) to remove the motion-blur from the images. A turret is used to steer the field of view of the instrument left to right to ensure it always looks along the magnetic meridian (towards the magnetic pole). Acknowledgement National Aeronautics and Space Administration; Dr. Farzad Kamalabadi; Dr. Thomas Immel PublicationInfo Authors Kamalabadi, F. PublicationDate 2023-01-01 00:00:00Z PublishedBy Space Physics Data Facility Funding Agency National Aeronautics and Space Administration Project Explorers Program AwardNumber NNG12FA45C Contacts Role Person StartDate StopDate Note 1. PrincipalInvestigator spase://SMWG/Person/Farzad.Kamalabadi InformationURL Name Additional information on ICON URL https://icon.ssl.berkeley.edu/ Description ICON spacecraft Homepage. InformationURL Name The far ultra-violet Imager on the ICON mission URL https://doi.org/10.1007/s11214-017-0386-0 Description Space Science Reviews, 212(1-2), pp.655-696. DOI: 10.1007/s11214-017-0386-0 InformationURL Name HelioData URL https://helio.data.nasa.gov/dataset/ICON_FUV_L2_Night_PT12S Description The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more. AccessInformation RepositoryID spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Availability Online AccessRights Open RightsList Rights SchemeURI https://spdx.org/licenses/ RightsIdentifierScheme SPDX RightsIdentifier CC0-1.0 RightsURI https://spdx.org/licenses/CC0-1.0.html RightsName Creative Commons Zero v1.0 Universal Note CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products AccessURL Name CDAWeb HAPI Server URL https://cdaweb.gsfc.nasa.gov/hapi Style HAPI ProductKey ICON_L2-5_FUV_NIGHT Description Web Service to this product using the HAPI interface. Format NetCDF Acknowledgement Please acknowledge Dr. Farzad Kamalabadi and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data. AccessInformation RepositoryID spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Availability Online AccessRights Open RightsList Rights SchemeURI https://spdx.org/licenses/ RightsIdentifierScheme SPDX RightsIdentifier CC0-1.0 RightsURI https://spdx.org/licenses/CC0-1.0.html RightsName Creative Commons Zero v1.0 Universal Note CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products AccessURL Name HTTPS from SPDF URL https://spdf.gsfc.nasa.gov/pub/data/icon/l2/l2-5_fuv_night/ ProductKey ICON_L2-5_FUV_NIGHT Description Access to Data in NetCDF Format via https from SPDF AccessURL Name CDAWeb URL https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ICON_L2-5_FUV_NIGHT&index=sp_phys ProductKey ICON_L2-5_FUV_NIGHT Description Access to NetCDFs via NASA/GSFC CDAWeb Format NetCDF Encoding None AccessDirectoryTemplate https://cdaweb.gsfc.nasa.gov/pub/data/icon/l2/l2-5_fuv_night/$Y AccessFilenameTemplate icon_l2-5_fuv_night_$Y$m$d_v07r000.nc Acknowledgement Please acknowledge Dr. Farzad Kamalabadi and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data. AccessInformation RepositoryID spase://SMWG/Repository/NASA/GSFC/SPDF Availability Online AccessRights Open AccessURL Name CDAWeb Programmatic Data Access URL https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/ICON_L2-5_FUV_NIGHT/clientLibraryExample/ Style WebService ProductKey ICON_L2-5_FUV_NIGHT Description Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Format Binary Acknowledgement Please acknowledge Dr. Farzad Kamalabadi and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data. ProcessingLevel Calibrated ProviderName ICON FUV team InstrumentIDs spase://SMWG/Instrument/ICON/FUV MeasurementType ImageIntensity TemporalDescription TimeSpan StartDate 2019-12-06 00:00:00Z StopDate 2022-11-25 23:59:59Z Cadence PT30S ObservedRegion Earth.NearSurface.Atmosphere ObservedRegion Earth.NearSurface.Ionosphere Parameter #1 Name Epoch Time ParameterKey Epoch Description Milliseconds since 1970-01-01 00:00:00 UTC at middle of measurement integration. Cadence PT12S Units ms ValidMin 0 ValidMax 31536000000000 FillValue -1 Support Qualifier Magnitude SupportQuantity Temporal Parameter #2 Name Center UTC Integration Time ParameterKey ICON_L25_UTC_Time Description Center time of 12-second profile integration. Cadence PT12S ValidMin 1970-01-01 00:00:00 ValidMax 2100-12-31 23:59:59 FillValue '' Support Qualifier Magnitude SupportQuantity Temporal Parameter #3 Name Start UTC Integration Time ParameterKey ICON_L25_Start_Times Description Start time of 12-second profile integration. Cadence PT12S ValidMin 1970-01-01 00:00:00 ValidMax 2100-12-31 23:59:59 FillValue '' Support Qualifier Magnitude SupportQuantity Temporal Parameter #4 Name Stop UTC Integration Time ParameterKey ICON_L25_Stop_Times Description Stop time of 12-second profile integration. Cadence PT12S ValidMin 1970-01-01 00:00:00 ValidMax 2100-12-31 23:59:59 FillValue '' Support Qualifier Magnitude SupportQuantity Temporal Parameter #5 Name Spacecraft WGS84 Latitude ParameterKey ICON_L25_Observatory_Position_Latitude Description The WGS84 latitude of the ICON S/C. Cadence PT12S Units degrees North ValidMin -90 ValidMax 90 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #6 Name Spacecraft WGS84 Longitude ParameterKey ICON_L25_Observatory_Position_Longitude Description The WGS84 longitude of the ICON S/C. Cadence PT12S Units degrees East ValidMin 0 ValidMax 360 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #7 Name Altitude of the ICON S/C ParameterKey ICON_L25_Observatory_Position_Altitude Description The WGS84 altitude of the ICON S/C. Cadence PT12S Units km ValidMin 0 ValidMax 1000 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #8 Name Orbit Number ParameterKey ICON_L25_Orbit_Number Description Orbit Number Cadence PT12S ValidMin 0 ValidMax 105000 FillValue -999 Support Qualifier Scalar SupportQuantity Temporal Parameter #9 Name O+ latitude in WGS84 ParameterKey ICON_L25_O_Plus_Profile_Latitude Description O+ latitude in WGS84. Cadence PT12S Units degrees North ValidMin -90 ValidMax 90 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #10 Name O+ longitude in WGS84 ParameterKey ICON_L25_O_Plus_Profile_Longitude Description O+ longitude in WGS84. Cadence PT12S Units degrees East ValidMin 0 ValidMax 360 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #11 Name Altitude of the ICON S/C ParameterKey ICON_L25_O_Plus_Profile_Altitude Description O+ altitude in WGS84 Cadence PT12S Units km ValidMin 100 ValidMax 600 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #12 Name Field of View Celestial Azimuth ParameterKey ICON_L25_Celestial_Azimuth_Angle_Profile Description Field of View Celestial Azimuth. Cadence PT12S Units degrees ValidMin 0 ValidMax 360 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #13 Name Field of View Celestial Zenith ParameterKey ICON_L25_Celestial_Zenith_Angle_Profile Description Field of View Celestial Zenith. Cadence PT12S Units degrees ValidMin 0 ValidMax 180 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #14 Name Volume Emission Rate of 135.6-nm emission ParameterKey ICON_L25_VER Description VER of 135.6-nm emission as a function of altitude. Cadence PT12S Units ph/cm^3/s ValidMin 0 ValidMax 100 FillValue -999 Wave WaveType Photon Qualifier LineOfSight WaveQuantity VolumeEmissionRate Parameter #15 Name Error in VER of 135.6-nm Emission ParameterKey ICON_L25_VER_Error Description Error in VER of 135.6-nm emission as a function of altitude. Cadence PT12S Units ph/cm^3/s ValidMin 0 ValidMax 100 FillValue -999 Support Qualifier Uncertainty SupportQuantity Other Parameter #16 Name O+ Density as a Function of Altitude ParameterKey ICON_L25_O_Plus_Density Description O+ density as a function of altitude. Cadence PT12S Units 1/cm^3 ValidMin 0 ValidMax 10000000000 FillValue -999 Particle ParticleType Ion Qualifier LineOfSight ParticleQuantity FlowSpeed AtomicNumber 8 Parameter #17 Name Error in O+ Density ParameterKey ICON_L25_O_Plus_Density_Error Description Error in O+ density as a function of altitude. Cadence PT12S Units 1/cm^3 ValidMin 0 ValidMax 10000000000 FillValue -999 Support Qualifier Uncertainty SupportQuantity Other Parameter #18 Name Altitudes of the Peak O+ Densities ParameterKey ICON_L25_HMF2 Description Altitudes of the peak O+ densities Cadence PT12S Units km ValidMin 130 ValidMax 580 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #19 Name Latitude of the Peak O+ densities ParameterKey ICON_L25_Latitude Description Latitudes of the peak O+ densities in WGS84. Cadence PT12S Units degrees ValidMin -90 ValidMax 90 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #20 Name Longitude of the Peak O+ densities ParameterKey ICON_L21_Observatory_Longitude Description Longitudes of the peak O+ densities in WGS84. Cadence PT12S Units degrees ValidMin 0 ValidMax 360 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #21 Name Solar Zenith Angles of NmF2 Points ParameterKey ICON_L25_Solar_Zenith_Angle Description Solar zenith angles of peak ion density of the F-layer points (NmF2). Cadence PT12S Units degrees ValidMin 0 ValidMax 180 FillValue 9.969209968386869e+36 Support Qualifier Direction SupportQuantity Positional Parameter #22 Name Magnetic Latitude of the Peak O+ densities ParameterKey ICON_L25_Magnetic_Latitude Description Magnetic latitudes of the peak O+ densities. Cadence PT12S Units degrees ValidMin -90 ValidMax 90 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #23 Name Magnetic Longitude of the Peak O+ densities ParameterKey ICON_L25_Magnetic_Longitude Description Magnetic longitudes of the peak O+ densities in WGS84. Cadence PT12S Units degrees ValidMin 0 ValidMax 360 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #24 Name Error in Estimated Altitudes of the Peak O+ Densities ParameterKey ICON_L25_HMF2_Error Description Error in estimated altitudes of the peak O+ densities. Cadence PT12S Units ph/cm^3/s ValidMin 0 ValidMax 1000 FillValue -999 Support Qualifier Uncertainty SupportQuantity Other Parameter #25 Name Estimated Peak O+ Densities ParameterKey ICON_L25_NMF2 Description Estimated peak O+ densities. Cadence PT12S Units 1/cm^3 ValidMin 0 ValidMax 10000000000 FillValue -999 Particle ParticleType Ion Qualifier LineOfSight ParticleQuantity FlowSpeed AtomicNumber 8 Parameter #26 Name Error in Estimated Altitudes of the Peak O+ Densities ParameterKey ICON_L25_NMF2_Error Description Error in estimated altitudes of the peak O+ densities. Cadence PT12S Units 1/cm^3 ValidMin 0 ValidMax 10000000000 FillValue -999 Support Qualifier Uncertainty SupportQuantity Other Parameter #27 Name Local Solar Time at the Retrieved Peak O+ Density Locations ParameterKey ICON_L25_Local_Solar_Time Description Local solar times at the retrieved peak O+ density locations. Cadence PT12S Units hours ValidMin 0 ValidMax 24 FillValue -999 Support Qualifier Direction SupportQuantity Positional Parameter #28 Name Inversion Quality ParameterKey ICON_L25_Quality Description A quantification of the inversion quality, from 0 (Bad) to 1 (Good). Cadence PT12S ValidMin 0 ValidMax 1 FillValue -999 Support Qualifier Scalar SupportQuantity DataQuality Parameter #29 Name Quality Flags ParameterKey ICON_L25_Quality_Flags Description Provides description about the observed inversion quality. Cadence PT30S ValidMin 0 ValidMax 31 FillValue -999 Support Qualifier Scalar SupportQuantity DataQuality Parameter #30 Name Inversion Method ParameterKey ICON_L25_Inversion_Method Description Used inversion method to get VER from brightness. Cadence PT12S FillValue '' Support Qualifier Fit SupportQuantity Other Contact SPDF: NASA-SPDF Feedback/Support Responsible NASA Official: Lan Jian Site Editor: Rita Johnson SPDF ROR ID SPDF re3data ID About NASA Accessibility FOIA No FEAR Act Privacy Policy Vulnerability Disclosure Policy Last Updated: 2026-08-26