2.3.2 spase://NASA/NumericalData/ICON/FUV/L2/Night/PT12S ICON The Far Ultra Violet Imaging Spectrograph Nightside Images FUV Nightside Images 2021-01-01T00:00:00Z 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). National Aeronautics and Space Administration; Dr. Stephen Mende National Aeronautics and Space Administration Explorers Program contracts NNG12FA45C spase://SMWG/Person/Stephen.B.Mende PrincipalInvestigator Additional information on ICON https://icon.ssl.berkeley.edu/ ICON spacecraft Homepage. The far ultra-violet Imager on the ICON mission https://doi.org/10.1007/s11214-017-0386-0 Space Science Reviews, 212(1-2), pp.655-696. DOI: 10.1007/s11214-017-0386-0 spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/icon/l2/ FTPS access to ICON data via ftps at the Space Physics Data Facility (SPDF) HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/icon/l2/ HTTPS ccess to ICON data at the Space Physics Data Facility (SPDF) NetCDF Calibrated ICON FUV team spase://SMWG/Instrument/ICON/FUV ImageIntensity 2019-12-06T00:00:00Z -P2M PT30S Earth.NearSurface.Atmosphere Earth.NearSurface.Ionosphere Epoch Time Epoch Milliseconds since 1970-01-01 00:00:00 UTC at middle of measurement integration. PT12S ms 0 31536000000000 -1 Magnitude Temporal Center UTC Integration Time ICON_L25_UTC_Time Center time of 12-second profile integration. PT12S 1970-01-01 00:00:00 2100-12-31 23:59:59 '' Magnitude Temporal Start UTC Integration Time ICON_L25_Start_Times Start time of 12-second profile integration. PT12S 1970-01-01 00:00:00 2100-12-31 23:59:59 '' Magnitude Temporal Stop UTC Integration Time ICON_L25_Stop_Times Stop time of 12-second profile integration. PT12S 1970-01-01 00:00:00 2100-12-31 23:59:59 '' Magnitude Temporal Spacecraft WGS84 Latitude ICON_L25_Observatory_Position_Latitude The WGS84 latitude of the ICON S/C. PT12S degrees North -90 90 -999 Direction Positional Spacecraft WGS84 Longitude ICON_L25_Observatory_Position_Longitude The WGS84 longitude of the ICON S/C. PT12S degrees East 0 360 -999 Direction Positional Altitude of the ICON S/C ICON_L25_Observatory_Position_Altitude The WGS84 altitude of the ICON S/C. PT12S km 0 1000 -999 Direction Positional Orbit Number ICON_L25_Orbit_Number Orbit Number PT12S 0 105000 -999 Scalar Temporal O+ latitude in WGS84 ICON_L25_O_Plus_Profile_Latitude O+ latitude in WGS84. PT12S degrees North -90 90 -999 Direction Positional O+ longitude in WGS84 ICON_L25_O_Plus_Profile_Longitude O+ longitude in WGS84. PT12S degrees East 0 360 -999 Direction Positional Altitude of the ICON S/C ICON_L25_O_Plus_Profile_Altitude O+ altitude in WGS84 PT12S km 100 600 -999 Direction Positional Field of View Celestial Azimuth ICON_L25_Celestial_Azimuth_Angle_Profile Field of View Celestial Azimuth. PT12S degrees 0 360 -999 Direction Positional Field of View Celestial Zenith ICON_L25_Celestial_Zenith_Angle_Profile Field of View Celestial Zenith. PT12S degrees 0 180 -999 Direction Positional Volume Emission Rate of 135.6-nm emission ICON_L25_VER VER of 135.6-nm emission as a function of altitude. PT12S ph/cm^3/s 0 100 -999 Photon LineOfSight VolumeEmissionRate Error in VER of 135.6-nm Emission ICON_L25_VER_Error Error in VER of 135.6-nm emission as a function of altitude. PT12S ph/cm^3/s 0 100 -999 Uncertainty Other O+ Density as a Function of Altitude ICON_L25_O_Plus_Density O+ density as a function of altitude. PT12S 1/cm^3 0 10000000000 -999 Ion LineOfSight FlowSpeed 8 Error in O+ Density ICON_L25_O_Plus_Density_Error Error in O+ density as a function of altitude. PT12S 1/cm^3 0 10000000000 -999 Uncertainty Other Altitudes of the Peak O+ Densities ICON_L25_HMF2 Altitudes of the peak O+ densities PT12S km 130 580 -999 Direction Positional Latitude of the Peak O+ densities ICON_L25_Latitude Latitudes of the peak O+ densities in WGS84. PT12S degrees -90 90 -999 Direction Positional Longitude of the Peak O+ densities ICON_L21_Observatory_Longitude Longitudes of the peak O+ densities in WGS84. PT12S degrees 0 360 -999 Direction Positional Solar Zenith Angles of NmF2 Points ICON_L25_Solar_Zenith_Angle Solar zenith angles of peak ion density of the F-layer points (NmF2). PT12S degrees 0 180 9.969209968386869e+36 Direction Positional Magnetic Latitude of the Peak O+ densities ICON_L25_Magnetic_Latitude Magnetic latitudes of the peak O+ densities. PT12S degrees -90 90 -999 Direction Positional Magnetic Longitude of the Peak O+ densities ICON_L25_Magnetic_Longitude Magnetic longitudes of the peak O+ densities in WGS84. PT12S degrees 0 360 -999 Direction Positional Error in Estimated Altitudes of the Peak O+ Densities ICON_L25_HMF2_Error Error in estimated altitudes of the peak O+ densities. PT12S ph/cm^3/s 0 1000 -999 Uncertainty Other Estimated Peak O+ Densities ICON_L25_NMF2 Estimated peak O+ densities. PT12S 1/cm^3 0 10000000000 -999 Ion LineOfSight FlowSpeed 8 Error in Estimated Altitudes of the Peak O+ Densities ICON_L25_NMF2_Error Error in estimated altitudes of the peak O+ densities. PT12S 1/cm^3 0 10000000000 -999 Uncertainty Other Local Solar Time at the Retrieved Peak O+ Density Locations ICON_L25_Local_Solar_Time Local solar times at the retrieved peak O+ density locations. PT12S hours 0 24 -999 Direction Positional Inversion Quality ICON_L25_Quality A quantification of the inversion quality, from 0 (Bad) to 1 (Good). PT12S 0 1 -999 Scalar DataQuality Quality Flags ICON_L25_Quality_Flags Provides description about the observed inversion quality. PT30S 0 31 -999 Scalar DataQuality Inversion Method ICON_L25_Inversion_Method Used inversion method to get VER from brightness. PT12S '' Fit Other