2.7.2 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://SMWG/NumericalData/ICON/EUV/L3/Climatology-Night-Oplus/P10D NASA NumericalData ICON Extreme Ultraviolet Night Time Oplus Images EUV Nighttime Oplus Images 2026-08-05T00:00:00Z 2026-08-05T00:00:00Z First release. JMW. ICON Night time Oplus climatology. The L3 FUV Night Limb files are produced from the L2.5 ICON FUV Night files. All variables within the file are described in their Var_notes attribute. The data are identified in one of 2 var_types: data – which contains the primary data product and support data – which contains parameters used in the retrieval such as geometry etc. that may also be useful in any analysis of this data. This single file spans the whole mission National Aeronautics and Space Administration; Dr. Farzad Kamalabadi; Dr. Thomas J. Immel Edelstein, J. 2026-06-16T00:00:00 Space Physics Data Facility National Aeronautics and Space Administration Explorers Program NNG12FA44C National Aeronautics and Space Administration Explorers Program contracts NNG12FA42I spase://SMWG/Person/Farzad.Kamalabadi PrincipalInvestigator spase://SMWG/Person/James.M.Weygand MetadataContact Additional information on ICON https://icon.ssl.berkeley.edu/ ICON spacecraft Homepage. Design and Performance of the ICON EUV Spectrograph https://doi.org/10.1007/s11214-017-0384-2 Space Science Reviews, 212(1-2), pp.631-643. DOI: 10.1007/s11214-017-0384-2 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 CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi ICON_L3-3_Climatology-Night-Oplus Web Service to this product using the HAPI interface. NetCDF National Aeronautics and Space Administration; Dr. Roderick A. Heelis; Dr. Thomas Immel. 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 SPDF https://spdf.gsfc.nasa.gov/pub/data/icon/l3/climatology/ ICON_L3-3_Climatology-Night-Oplus Access to Data in NetCDF Format via https from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ICON_L3-3_Climatology-Daytime-Oplus&index=sp_phys ICON_L3-3_Climatology-Night-Oplus Access to ASCII, NetCDF, CDF, and Plots via NASA/GSFC CDAWeb NetCDF None National Aeronautics and Space Administration; Dr. Roderick A. Heelis; Dr. Thomas Immel. Calibrated ICON EUV team spase://SMWG/Instrument/ICON/EUV ImageIntensity 2019-12-09T19:01:48Z 2022-11-03T23:27:18Z PT1800S Earth.NearSurface.Atmosphere Earth.NearSurface.Ionosphere Epoch Time Epoch Time corresponding to the middle of each 48 day average, in milliseconds since Jan 1 1970. P10D ms 0 6000000000000 -999 Magnitude Temporal 48 day bins ICON_L33_Included_Dates Dates used in each 48 day bin, in string format, in the format: 2017-05-27. P10D -999 Magnitude Temporal Binned O+ Density ICON_L33_OPlus Mean value of FUV nighttime O+ Density, taken over all good quality L2 datapoints in a 48-day time-span, as a function of altitude,longitude, latitude, time. Derived from ICON_L24_Disk_ON2. P10D 1/cm^3 0 1.000000020040877e+20 -999 Ion Average NumberDensity 8 Binned HMF2 ICON_L33_HMF2 Binned HMF2. Mean value of HMF2, taken over all good quality L2 datapoints in a 48-day time-span, as a function of longitude, latitude, time. Derived from ICON_L25_HMF2.. P10D km 0 1.000000020040877e+20 -999 Scalar Positional Binned NMF2 ICON_L33_NMF2 Electron density at the peak of the F2 layer from retrieval. Mean value of NMF2, taken over all good quality L2 datapoints in a 48-day time-span, as a function of longitude, latitude, time. Derived from ICON_L25_NMF2. P10D 1/cm^3 0 1.000000020040877e+20 -999 Electron Average NumberDensity Number of data points ICON_L33_Datapoints Number of data points in each 48 day average, as a function of altitude, longitude, latitude, time. P10D 0 1.000000020040877e+20 -999 Scalar Other Sigma O+ Density ICON_L33_Sigma_OPlus 1 standard deviation of the good O+ values used to compute the mean, as a function of altitude, longitude, latitude, time. P10D 1/cm^3 0 1.000000020040877e+20 -999 Ion StandardDeviation NumberDensity 8 Sigma HMF2 ICON_L33_Sigma_HMF2 1 standard deviation of the good column HMF2 values used to compute the mean, as a function of longitude, latitude, time. P10D km 0 1.000000020040877e+20 -999 StandardDeviation Positional Sigma HMF2 ICON_L33_Sigma_NMF2 Electron density at the peak of the F2 layer from retrieval. 1 standard deviation of the good column NMF2 values used to compute the mean, as a function of longitude, latitude, time. P10D 1/cm^3 0 1.000000020040877e+20 -999 Electron StandardDeviation NumberDensity Binned Altitude Grid ICON_L33_Altitude Altitude of the O+ data, binned in 4 km intervals, altitude +/- 2.0 km. Derived from ICON_L25_O+_Profile_Altitude. P10D km 154 510 -999 Direction Positional Local Time Bin ICON_L33_LocalTime Local time binned in 0.5 hour intervals, local time +/- 0.25 hours. P10D hours 0.25 23.75 -999 Direction Positional Latitude Bin ICON_L33_Latitude Latitude of the O+ data, binned in 5 degree intervals, latitude +/- 2.5 degrees. Derived from ICON_L25_O+_Profile_Latitude. P10D degrees -10 50 -999 Direction Positional Longitude Bin ICON_L33_Longitude Longitude of the O+ data, binned in 15 degree intervals, longitude +/- 7.5 degrees. Derived from ICON_L25_O+_Profile_Longitude. P10D degrees 0 360 -999 Direction Positional