2.7.1 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/LANL/1994/MPA/PT86S NASA NumericalData LANL1994Magnetospheric Plasma Analyzer (MPA) at 87 sec Resolution in Spacecraft Coordinates LANL 084 MPA data https://doi.org/10.48322/8y0b-0s77 2025-12-04T13:29:50Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2023-07-30T12:34:56.789 Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727 2023-12-24T12:34:56.789 Correct geosynchronous spelling as requested. Removed ftp link. Corrected CDAWeb url. JMW 2025-05-22T15:38:11 Added ObservedRegion. JMW 2025-10-02T15:12:02Z Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB 2025-12-04T13:29:50Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB The LANL 1994-084 MPA data set contains various parameters in a variety of coordinates systems including GEI, spacecraft, polar geographic, and polar magnetic coordinates at about 87 s resolution. These parameters include universal time, denisty, velocity, and temperature for both low and high energy ions and electrons as well as position information and instrument status flags. Los Alamos National Laboratory; Dr. Michelle Thomsen; Dr. Michael G. Henderson Thomsen, M. F.; Henderson, M. G. 2023-01-01T00:00:00 Space Physics Data Facility spase://SMWG/Person/Michelle.F.Thomsen PrincipalInvestigator spase://SMWG/Person/Michael.G.Henderson GeneralContact spase://SMWG/Person/James.M.Weygand MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact Los Alamos Nation Laboratory spacecraft Magnetospheric Plasma Analyzer https://doi.org/10.1029/93JA00726 Journal of Geophysical Research Article on the LANL MPA instrument. spase://VMO/NumericalData/LANL/LANL1994/MPA/PT87S spase://VSPO/NumericalData/P_LANL1994_HDR_MPA_86S spase://VMO/NumericalData/LANL/1994/MPA/PT87S spase://VSPO/NumericalData/LANL/1994/MPA/PT86S 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/lanl/94_mpa/ In CDF via HTTP from CDAWeb CDAWeb https://cdaweb.gsfc.nasa.gov/pub/data/lanl/94_mpa/ L4_K0_MPA CDF https://cdaweb.gsfc.nasa.gov/pub/data/lanl/94_mpa/$Y l4_k0_mpa_$Y$m$d_$v.cdf LANL; Dr. Michelle Thomsen; Dr. Michael G. Henderson spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/L4_K0_MPA/clientLibraryExample/ L4_K0_MPA Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary LANL; Dr. Michelle Thomsen; Dr. Michael G. Henderson 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 L4_K0_MPA Web Service to this product using the HAPI interface. CSV LANL; Dr. Michelle Thomsen; Dr. Michael G. Henderson Calibrated LANL 084 MPA Numerical Data spase://SMWG/Instrument/LANL/1994/MPA EnergeticParticles 1996-01-01T00:00:00 2008-01-03T23:59:59 Time format in data files is: day, month, year hour, min, seconds. Ex: '01-Jan-1981 00:00:00.000' PT87S Earth.Magnetosphere.Main Earth.Magnetosphere.RadiationBelt Earth.NearSurface.Plasmasphere Flags=-1.0e+31. The content of the LANL SOPA cdfs at CDAWeb has not been fully documented. 87 sec geosynchronous LANL Magnetospheric Plasma Analyzer MPA LANL 084 MPA Time of proton collection Epoch This is the time of the proton data collection (electrons 21.5 seconds later). Universal Time in data cell: day, month, year hour, min, seconds. Ex: '01-Jan-1981 00:00:00.000'. Interval centered time tag ms '1.0e-3>s' Epoch 01-08-1992T00:00:00.000 31-12-2020T23:59:59.000 -1.0000e+031 Temporal LANL 084 MPA Time of proton collection Time_PB5 This is the time of the proton collection (electrons 21.5 seconds later). Time in the format: year, day of year, and second of the same day. Interval centered time tag Epoch 3 Date and Time Vector. Year 1 Years 1992 2020 Day of Year 2 Days 0 366 milliseconds of the day 3 ms 0 86399000 -2147483648 Temporal LANL 084 MPA Partial Density of Low Energy Ions dens_lop Partial density of low energy ions (1-130 eV/e). cm^-3 1.0e6>m^-3 low p dens 0.1 1000.0 0.0 100000.0 -1.0000e+031 Ion Scalar NumberDensity 1 130 eV/e LANL 084 MPA Velocity Vector Low-Enery Ions vel_lop Velocity vector low-enery Ions (1-130 eV/e) in spacecraft Coordinates in units of km/s. km/s 1.0e3>m s^-1 Cartesian SC -100 100 3 VX Component.I 1 VY Component.J 2 VZ Component.K 3 -2000 2000 -1.0000e+031 Ion Vector Velocity LANL 084 MPA Temperature Low Energy Ions temp_lop Temperature of low energy ions (1-130 eV/e). eV low p temp 0.1 100.0 0.0 50000.0 -1.0000e+031 Ion Scalar Temperature 1 130 eV/e LANL 084 MPA Ratio of Temperature Eigenvalues for Low-E Ions tratio_lop Ratio of temperature (Tperp/Tmid) of low energy ions (1-130 eV/e). Tper/Tmid 0.1 10.0 0.0 100.0 -1.0000e+031 Ion Ratio Temperature 1 130 eV/e LANL 084 MPA Partial Density High-E Ions dens_hip Partial density of high energy ions (.13-45 keV/e). cm^-3 hi p dens 0.01 10.0 0.0 10000.0 -1.0000e+031 Ion Scalar NumberDensity 0.13 45 keV/e LANL 084 MPA Velocity Vector High-E Ions vel_hip Velocity vector high-enery protons (.13-45 keV/e) in spacecraft Coordinates in units of km/s. km/s 1.0e3>m s^-1 Cartesian SC -200 200 3 VX Component.I 1 VY Component.J 2 VZ Component.K 3 -2000 2000 -1.0000e+031 Ion Vector Velocity LANL 084 MPA Temperature High-E Ions temp_hip Temperature of high energy ions (.13-45 keV/e). eV high p temp 100 100000.0 2 Temp Parallel Component.I 1 Temp Perpendicular Component.J 2 0.0 50000.0 -1.0000e+031 Ion Array Temperature 0.13 45 keV/e LANL 084 MPA Polar, Azimuthal Angle High-E Proton Symmetry Axis theta_phi_hip Proton symmetry axis: polar angle relative to Earth direction, azimuthal angle from the north. deg Spherical SC 2 Polar Angle DirectionAngle.PolarAngle 1 degrees 0 180 Azimuthal Angle DirectionAngle.AzimuthAngle 2 degrees -90 90 -1.0000e+031 Ion Array ArrivalDirection 0.13 45 keV/e LANL 084 MPA Ratio of Temperature Eigenvalues for High-E Ions tratio_hip Ratio of temperature (Tperp/Tmid) of low energy ions (.13-45 keV/e). Tper/Tmid 0.1 10.0 0.0 100.0 -1.0000e+031 Ion Ratio Temperature 0.13 45 keV/e LANL 084 MPA Partial Density Electrons dens_e Partial density of electrons (.03-45 keV/q). # cm^-3 elec dens 0.01 100.0 0.0 100000.0 -1.0000e+031 Electron Scalar NumberDensity 0.03 45 keV/e LANL 084 MPA Temperature Electrons temp_e Temperature of electrons (.03-45 keV/q). eV Temperatures, parallel and perp. for electrons 100 100000.0 2 Temp Parallel Component.I 1 Temp Perpendicular Component.J 2 0.0 50000.0 -1.0000e+031 Electron Array Temperature 0.03 45 keV/e LANL 084 MPA Polar, Azimuthal Angle Electron Symmetry Axis theta_phi_e Electron symmetry axis: polar angle relative to Earth direction, azimuthal angle from the north. Spherical SC 2 Polar Angle DirectionAngle.PolarAngle 1 degrees 0 180 Azimuthal Angle DirectionAngle.AzimuthAngle 2 degrees -90 90 -1.0000e+031 Electron Array ArrivalDirection 0.03 45 keV/e LANL 084 MPA Ratio of Temperature Eigenvalues for Electrons tratio_e Ratio of temperature (Tperp/Tmid) of electrons (.03-45 keV/q). Tper/Tmid 0.1 10.0 0.0 100.0 -1.0000e+031 Electron Ratio Temperature 0.03 45 keV/e LANL 084 MPA Spacecraft Potential sc_pot Spacecraft potential in units of volts. volts S/C poten. -10000.0 0.0 -20000. 0.0 -1.0000e+031 Scalar Potential LANL 084 MPA Background Count Rate (Not Clear what this is the background for) bkgd Background Count Rate. cts/9ms Backgrd 0.1 1000.0 0.0 1000.0 -1.0000e+031 Scalar Other LANL 084 MPA Spacecraft Position, Polar Geographic Coordinates sc_pos_geo Spacecraft position, polar geographic coordinates (radius,lat,long). Spherical GEO 3 Polar Geographic Coordinates. Radius Magnitude 1 EarthRadii 0 10 Latitude DirectionAngle.ElevationAngle 2 degrees -90 90 Longitude DirectionAngle.AzimuthAngle 3 degrees -180 180 -1.0000e+031 Vector Positional LANL 084 MPA Spacecraft Position, Cartesian Geocentric Celestial Inertial coordinates sc_pos_syngci Spacecraft position, cartesian coordinates (radius,lat,long). Geocentric Celestial Inertial, is earth centered, with the X-axis pointing from the Earth towards the first point of Aries (the position of the Sun at vernal equinox). This direction is the intersection of the Earth's equatorial plane and the ecliptic plane--thus the X-axis lies in both planes. The Z-axis is parallel to the rotation axis of the Earth, and the Y-axis completes a right-handed orthogonal coordinate system. The X-axis is the direction of the mean vernal equinox of J2000. This is a virtual variable generated by read_myCDF w/ useof the data in the sc_pos_geo variable and a conversion routinespecified in the function attribute, namely conv_pos. Cartesian GEI 3 Geocentric Celestial Inertial coordinates. X Component.I 1 -1000 1000 Y Component.J 2 -1000 1000 Z Component.K 3 -1000 1000 -1.0000e+031 Vector Positional LANL 084 MPA Spacecraft Position, Polar Magnetic Coordinates sc_pos_mag Spacecraft position, polar magnetic coordinates (radius,lat,long). Spherical MAG 3 Polar Magnetic Coordinates. Radius Magnitude 1 EarthRadii 0 10 Latitude DirectionAngle.ElevationAngle 2 degrees -90 90 Magnetic Local Time DirectionAngle.AzimuthAngle 3 hours 0 24 -1.0000e+031 Vector Positional LANL 084 MPA Data Quality Flag qual_flag Data quality flag. Data quality flag, 0 = ok, 1 = Results unreliable. Qual Flag 0.0 10.0 0.0 10.0 -2147483648 Scalar Other LANL 084 MPA Data Gap Flag gap_flag Data gap flag. Data gap flag, 0 = No Gap, 10 = No data available. Gap Flag 0.0 10.0 0.0 10.0 -2147483648 Scalar Other LANL 084 MPA Time Offset for Electron Measurements offset_time Time offset for electron measurements. Electron sample time is 21.5 seconds after that of ions. ms T offset 21500.0 21500.0 21500.0 21500.0 -1.0000e+031 Scalar Temporal