2.3.2 spase://NASA/NumericalData/DE2/FPI/Neutral/PT8S DE 2 Fabry-Perot Interferometer (FPI), Thermospheric Neutral Gas Density, Meridional Wind, and Temperature, 8-sec data Dynamics Explorer 2 FPI Neutral 8s Data DE-B FPI Neutral 8s Data 2021-04-27T15:38:11Z The Fabry-Perot Interferometer, FPI, was a High-Resolution Remote Sensing Instrument designed to measure the Thermospheric Temperature, Meridional Wind, and Density of the following Metastable Atoms: Atomic Oxygen, Singlet S and D, and the 2P State of Ionic Atomic Oxygen. The FPI performed a Wavelength Analysis on the Light detected from the Thermospheric Emission Features by spatially scanning the Interference Fringe Plane with a Multichannel Array Detector. The Wavelength Analysis characterized the Doppler Line Profile of the emitting Species. A Sequential Altitude Scan performed by a Commandable Horizon Scan Mirror provided a Cross-Sectional View of the Thermodynamic and Dynamic State of the Thermosphere below the DE 2 Orbit. The Information obtained from this Investigation was used to Study the Dynamic Response of the Thermosphere to the Energy Sources caused by Magnetospheric Electric Fields and the Absorption of Solar Ultraviolet Light in the Thermosphere. The Instrument was based on the Visible Airglow Experiment, VAE, used in the AE Program. The Addition of a Scanning Mirror, the Fabry-Perot Etalon, an Image Plane Detector, and a Calibration Lamp were the Principal Differences. Interference Filters isolated Lines at 5577, 6300, 7320, 5896, and 5200, in Angstroms. The FPI had a Field of View of 0.53°, Half-Cone Angle. More Details are found in P. B. Hays et al., Space Sci. Instrum., 5(4), 395, 1981. From February 16, 1982 to September 11, 1982 the DE Satellite was inverted and the FPI measured Galactic Emissions. NOTE: Animations of DE2-FPI Science Products have been created as Daily Summary Files. The Animations contain Binned Averages displayed as a Color Code against a Geographic Background. The Bin Sizes are 7.5° Latitude and 24.0° Longitude. The Longitude Bin corresponds to the approximate Separation of adjacent Orbits, assuming that DE2 completed 15 Orbits per Day. The Animations are divided by Day, 06-18 LST, and Night, 18-06 LST, where LST is Local Standard Time. All Summary File Information and Animations employ Spacecraft Orbital Attitude Data. Users should note 1, that the DE2-FPI Experiment acquired Airglow Spectra by imaging the Terrestrial Limb below and ahead of the Spacecraft at an approximate Tangent Altitude of 250 km, 2, All Airglow Spectra were acquired while the DE2 Spacecraft orbited in it's Normal Configuration, which corresponded to Calendar Months August to February in 1981 to 1982 and n 1982 to 1983; 3, The Orbital Inclination of DE2 was 90° implying that DE2-FPI always viewed Ahead along the Meridian; 4, And that DE2 flew in an Elliptical Orbit with Perigee of 305 km and Apogee of 1300 km at Launch ans the Attitude of DE2 for each FPI Measurement is included with each reduced Data Point permitting Users to determine the Tangent Latitude corresponding to the 250 km Terrestrial Airglow Limb. The three GIF Animations are: 1. FPI_brightness.gif, which documents the OI, 630.0 nm,, Column Brightness in Units of log10 Rayleighs. Note different Scales for Day and Night. 2. FPI_temperature.gif, which documents the Neutral Thermosphere Temperature in Units of °Kelvin. 3. FPI_wind.gif, which documents the Line of Sight Neutral Wind Component in Units of m/s. The Wind Direction is positive when the Wind blows away from the approaching Spacecraft. R.J. Niciejewski spase://SMWG/Person/Richard.J.Niciejewski PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact spase://VSPO/NumericalData/DE2/FPI/Neutral/PT8S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/de/de2/neutral_gas_fpi/de2_neutral8s_fpi/ Access to Data in CDF Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/de/de2/neutral_gas_fpi/de2_neutral8s_fpi/ Access to Data in CDF Format via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=DE2_NEUTRAL8S_FPI&index=sp_phys DE2_NEUTRAL8S_FPI Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb CDF None R.J. Niciejewski. Please acknowledge the data providers and CDAWeb when using these data. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi DE2_NEUTRAL8S_FPI Web Service to this product using the HAPI interface. CSV R.J. Niciejewski. Please acknowledge the data providers and CDAWeb when using these data. Calibrated spase://SMWG/Instrument/DynamicsExplorer2/FPI EnergeticParticles 1981-08-09T00:00:00.000 1983-02-16T23:59:59.999 PT8S Earth.NearSurface.Ionosphere Earth.NearSurface.Thermosphere Epoch Time, since 0 A.D. Epoch Epoch Time, Milliseconds since 0 A.D., NSSDC Standard Reference Time Value Average Type: standard This parameter exhibits an increasing monotonic progression. PT8S ms 1e-3>s TimeSeries F14.0 6.2536662219904e+13 6.2834069019904e+13 15-Sep-1981 00:00:00.000 18-Feb-1991 23:59:59.999 -1.0e-31 Temporal Sequence ID, Orbit Time series defined by using: EPOCH seq1 Sequence ID for Orbit Data PT8S TimeSeries Seq-ID Orbit F9.0 0.0 1.0e+14 -9999.0 Other Year, Day of Year Time series defined by using: EPOCH yyddd Year, Day of Year, Format: YYDDD, January 1 is DDD=001 PT8S TimeSeries ddd=1 for 1-Jan F5.0 0.0 999999.0 -9999.0 Temporal Universal Time Time series defined by using: EPOCH UT Universal Time, UT PT8S s TimeSeries UT F5.0 0.0 86400.0 -9999.0 Temporal Spacecraft Magnetic Latitude Time series defined by using: EPOCH mlat Spacecraft Magnetic Latitude PT8S ° 0.0174532925>rad TimeSeries Mag Lat F6.2 -90.0 90.0 -9999.0 Positional Spacecraft Magnetic Local Time Time series defined by using: EPOCH MLT Spacecraft Magnetic Local Time PT8S h 3600>s TimeSeries MLT F6.2 0.0 24.0 -9999.0 Positional Orbit Number Time series defined by using: EPOCH OrbitNumber Orbit Number PT8S TimeSeries Orbit # I6 1.0 999999.0 -9.0 Other Spacecraft Altitude Time series defined by using: EPOCH alt Spacecraft Altitude PT8S km 1e3>m TimeSeries Altitude F7.2 0.0 10000.0 -9999.0 Scalar Positional Spacecraft Latitude, GEO Time series defined by using: EPOCH glat Spacecraft Latitude, Geographic, GEO PT8S ° 0.0174532925>rad Spherical GEO TimeSeries Geog Lat F6.2 -90.0 90.0 -9999.0 DirectionAngle.ElevationAngle Positional Spacecraft Longitude, GEO Time series defined by using: EPOCH glon Spacecraft Longitude, Geographic, GEO PT8S ° 0.0174532925>rad Spherical GEO TimeSeries Geog Long F6.2 -180.0 180.0 -9999.0 DirectionAngle.AzimuthAngle Positional Spacecraft Local Solar Time Time series defined by using: EPOCH locst Spacecraft Local Solar Time PT8S h 3600>s TimeSeries LST F6.2 0.0 24.0 -9999.0 DirectionAngle.AzimuthAngle Positional Spacecraft Invariant Latitude Time series defined by using: EPOCH ilat Spacecraft Invariant Latitude PT8S ° 0.0174532925>rad Spherical CGM TimeSeries Inv Lat F6.2 -90.0 90.0 -9999.0 DirectionAngle.ElevationAngle Positional Spacecraft Local Magnetic Time Time series defined by using: EPOCH locmt Spacecraft Local Magnetic Time PT8S h 3600>s Spherical CGM TimeSeries LMT F6.2 0.0 24.0 -9999.0 DirectionAngle.AzimuthAngle Positional Spacecraft Solar Zenith Angle Time series defined by using: EPOCH sza Spacecraft Solar Zenith Angle PT8S ° 0.0174532925>rad TimeSeries SZA F10.5 0.0 180.0 -9999.0 DirectionAngle.PolarAngle Positional Spacecraft Latitude, CGM Time series defined by using: EPOCH cgmlat Spacecraft Corrected Geomagnetic Latitude PT8S ° 0.0174532925>rad Spherical CGM TimeSeries CGM Lat F6.2 -90.0 90.0 -9999.0 DirectionAngle.ElevationAngle Positional Spacecraft Longitude, CGM Time series defined by using: EPOCH cgmlon Spacecraft Corrected Geomagnetic Longitude PT8S ° 0.0174532925>rad Spherical CGM TimeSeries CGM Long F6.2 -180.0 180.0 -9999.0 DirectionAngle.AzimuthAngle Positional Spacecraft Local Time, CGM Time series defined by using: EPOCH cgmlt Spacecraft Corrected Geomagnetic Local Time PT8S h 3600>s Spherical CGM TimeSeries CGM LT F6.2 0.0 24.0 -9999.0 DirectionAngle.AzimuthAngle Positional Sequence ID, FPI Time series defined by using: EPOCH seq2 Sequence ID for Fabry-Perot Interferometer, FPI, Data PT8S TimeSeries Seq-ID FPI F9.0 0.0 1.0e+14 -9999.0 Other Meridional Wind, FPI Time series defined by using: EPOCH mer Meridional Wind, Positive away from the Spacecraft, measured by the Fabry-Perot Interferometer, FPI PT8S m/s Cartesian GEO TimeSeries Merid Wind F6.2 0.0 1.0e+14 -9999.0 Atom Ion Component.I FlowSpeed Meridional Wind, Error, FPI Time series defined by using: EPOCH merror Meridional Wind, Error, measured by the Fabry-Perot Interferometer, FPI PT8S m/s Cartesian GEO TimeSeries Mer Wind Err F6.2 0.0 1.0e+14 -9999.0 Atom Ion Component.I FlowSpeed Neutral Temperature, FPI Time series defined by using: EPOCH TnF Neutral Temperature, measured by the Fabry-Perot Interferometer, FPI PT8S °K TimeSeries Tn-FPI F6.2 -1.0e+14 1.0e+14 -9999.0 Atom Scalar Temperature Neutral Temperature, Error, FPI Time series defined by using: EPOCH TnFerr Neutral Temperature, Error, measured by the Fabry-Perot Interferometer, FPI PT8S °K TimeSeries Tn-FPI Err F9.2 -1.0e+14 1.0e+14 -9999.0 Atom Uncertainty Temperature OI, 6300Å, Brightness, FPI Time series defined by using: EPOCH v6300 OI, 6300Å, Brightness, measured by the Fabry-Perot Interferometer, FPI PT8S R 1e-10>m^-2 s-1 TimeSeries OI-6300A F9.2 -1.0e+14 1.0e+14 -9999.0 Electromagnetic Scalar Intensity OI, 6300Å, Brightness, Error, FPI Time series defined by using: EPOCH v6300err OI, 6300Å, Brightness, Error, measured by the Fabry-Perot Interferometer, FPI PT8S R 1e-10>m^-2 s-1 TimeSeries OI Error F9.2 -1.0e+14 1.0e+14 -9999.0 Electromagnetic Uncertainty Intensity Sequence ID, WATS Time series defined by using: EPOCH seq3 Sequence ID for Wind and Temperature Spectrometer, WATS, Data PT8S TimeSeries Seq-ID WATS F9.0 0.0 1.0e+14 -9999.0 Other Zonal Wind, WATS Time series defined by using: EPOCH zon Zonal Wind, measured by the Wind and Temperature Spectrometer, WATS PT8S m/s Cartesian GEO TimeSeries Zonal Wind F9.2 -1.0e+14 1.0e+14 -9999.0 Atom Component.J FlowSpeed Neutral Temperature, WATS Time series defined by using: EPOCH TnW Neutral Temperature, measured by the Wind and Temperature Spectrometer, WATS PT8S °K TimeSeries Tn-WATS F9.2 -1.0e+14 1.0e+14 -9999.0 Atom Temperature Vertical Wind, WATS Time series defined by using: EPOCH ver Vertical Wind, measured by the Wind and Temperature Spectrometer, WATS PT8S m/s Cartesian GEO TimeSeries Vert Wind F9.2 -1.0e+14 1.0e+14 -9999.0 Atom Component.K FlowSpeed