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://NASA/NumericalData/ICON/MIGHTI/L3/Wind-Temperature/P10D NASA NumericalData The ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) Combined Wind and Temperaure https://doi.org/10.48322/tw3k-gr76 2026-10-03T19:00:03Z 2026-09-15T00:00:00Z First release 2026-09-22T00:00:00Z Fixed ResourceID error. JMW. 2026-10-03T19:00:03Z Added DOI. tlk The MIGHTI instrument measures the horizontal wind speed and direction (the wind vector). Each MIGHTI unit measures the wind along its line of sight. MIGHTI uses two perpendicular fields of view nominally pointing 45 degrees and 135 degrees in azimuth from the spacecraft velocity (MIGHTI A and MIGHTI B). Combining data from both units, this 90 degrees separation between their views allows the wind vector to be determined. For the wind measurements MIGHTI observes the Doppler shift of the atomic oxygen red and green lines at 630.0 nm and 557.7 nm wavelength. The wavelength shift is measured using field-widened, temperature compensated Doppler Asymmetric Spatial Heterodyne (DASH) spectrometers, employing low order échelle gratings operating at two different orders for the different atmospheric lines. The temperature measurement is accomplished by a multichannel photometric measurement of the spectral shape of the molecular oxygen A-band around 762 nm wavelength. For each field of view, the signals of the two oxygen lines and the A-band are detected on different regions of a single, cooled, frame transfer charge coupled device (CCD) detector. On-board calibration sources are used to periodically quantify thermal drifts, simultaneously with observing the atmosphere. National Aeronautics and Space Administration; Dr. Thomas Immel; Dr. Christoph Englert. Englert, C. 2026-09-15T00:00:00 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/Christoph.Englert PrincipalInvestigator Additional information on ICON https://icon.ssl.berkeley.edu/ ICON spacecraft Homepage. Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) on ICON https://doi.org/10.1007/s11214-023-00971-1 Space Science Reviews, 219(3), pp.27 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_Wind-Temperature Web Service to this product using the HAPI interface. NetCDF Please acknowledge Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data. 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/wind-temperature/ ICON_L3-3_Wind-Temperature Access to Data in NetCDF Format via https from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ICON_L3-3_Wind-Temperature&index=sp_phys ICON_L3-3_Wind-Temperature Access to NetCDFs via NASA/GSFC CDAWeb NetCDF None Please acknowledge Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data. Calibrated ICON MIGHTI team spase://SMWG/Instrument/ICON/MIGHTI Dopplergram 2019-12-29T01:18:49Z 2022-11-03T01:10:21Z P10D Earth.NearSurface.Atmosphere Earth.NearSurface.Ionosphere Milliseconds since 1970-01-01 00:00:00 UTC Epoch Time corresponding to the middle of each 48 day average, in milliseconds since Jan 1 1970. P10D ms 0 6000000000000 -999 Magnitude Temporal Dates used in each 48 day bin ICON_L33_Included_Dates Dates used in each 48 day bin, in string format, in the format: 2017-05-27. P10D -999 Magnitude Temporal Zonal Wind: Zonal component of the horizontal wind. Positive Eastward ICON_L33_ZONAL_WIND Mean value of zonal wind, taken over all good quality L31 datapoints in a 48-day time-span, as a function of longitude, latitude, time. Derived from ICON_L31_ZONAL_WIND P10D m/s -4000 4000 NaN Ion Magnitude FlowSpeed 8 Meridional Wind: Meridional component of the horizontal wind. Positive Northward. ICON_L33_MERIDIONAL_WIND Mean value of meridonal wind, taken over all good quality L31 datapoints in a 48-day time-span, as a function of altitude, longitude, latitude, time. Derived from ICON_L31_MERIDIONAL_WIND. P10D m/s -4000 4000 NaN Ion Magnitude FlowSpeed 8 Temperature ICON_L33_Temperature Mean value of temperature, taken over all good quality L31 datapoints in a 48-day time-span, as a function of altitude, longitude, latitude, time. Derived from ICON_L31_TEMPERATURE. PT31S K 0 9.999999848243207e+30 NaN Ion Scalar Temperature 8 Number of data points for zonal and meridional winds ICON_L33_Datapoints_Wind Number of data points in each 48 day average of zonal and meridoanl winds, as a function of altitude, longitude, latitude, time. P10D counts 0 1.000000020040877e+20 NaN Total Other Number of data points for temperature ICON_L33_Datapoints_Temperature Number of data points in each 48 day average of temperature, as a function of altitude,longitude, latitude, time. P10D counts 0 1.000000020040877e+20 NaN Total Other Sigma Zonal Wind ICON_L33_Sigma_Zonal_Wind 1 standard deviation of the good zonal wind values used to compute the mean, as a function of longitude, latitude, time. P10D m/s 0 1.000000020040877e+20 NaN Ion Magnitude FlowSpeed 8 Sigma Meridional Wind ICON_L33_Sigma_Meridional_Wind 1 standard deviation of the good meridional wind values used to compute the mean, as a function of altitude, longitude, latitude, time. P10D m/s 0 1.000000020040877e+20 NaN Ion Magnitude FlowSpeed 8 Sigma Temperature ICON_L33_Sigma_Temperature 1 standard deviation of the temperature values used to compute the mean, as a function of altitude, longitude, latitude, time. P10D K 0 1.000000020040877e+20 NaN Ion Scalar Temperature 8 WGS84 altitude of each wind or temperature sample ICON_L33_Altitude Altitude grid used by the forward model, in WGS.. P10D km 50 1600 -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 24 -999 Direction Positional Latitude Bin ICON_L33_Latitude Latitude of the MIGHTI data, binned in 5 degree intervals, latitude +/- 2.5 degrees. Derived from ICON_MIGHTI_L31_Latitude. P10D degrees -10 50 -999 Direction Positional Longitude Bin ICON_L33_Longitude Longitude of the MIGHTI data, binned in 15 degree intervals, longitude +/- 7.5 degrees. Derived from ICON_MIGHTI_L31_Longitude. P10D degrees 0 360 -999 Direction Positional