2.2.9 spase://NASA/NumericalData/AMPTE-IRM/Plasma/PT4.4S AMPTE-IRM Plasma Data 2020-07-07T21:14:16Z AMPT-IRM spin-averaged plasma moments at ~4.4 second resolution. User will acknowledge the AMPTE-IRM 3-D Plasma Analyser team in any publication resulting from the use of these data. spase://SMWG/Person/Goetz.Paschmann PrincipalInvestigator spase://SMWG/Person/Lynn.M.Kistler DataProducer AMPTE/IRM page at University of New Hampshire http://www-ssg.sr.unh.edu/index.html?tof/Missions/Ampte-irm Information on the AMPTE/IRM data spase://VMO/NumericalData/AMPTE_IRM/Plasma/PT4.4S spase://VMO/NumericalData/AMPTE-IRM/Plasma/PT4.4S spase://VSPO/NumericalData/AMPTE-IRM/Plasma/PT4.4S spase://SMWG/Repository/NASA/GSFC/VHO-VMO Online Open AMPTE/IRM Data https://vmo.nasa.gov/mission/ampte_irm/ A web-accessible directory hosting AMPTE/IRM spin-averaged magnetic field and plasma data. Text ASCII spase://SMWG/Instrument/AMPTE-IRM/Plasma Ephemeris ThermalPlasma 1984-08-22T12:58:03 1986-08-11T21:32:28 PT4.4S Earth.Magnetosheath Earth.Magnetosphere Earth.Magnetosphere.Magnetotail Heliosphere.NearEarth The only moment which should be used in the solar wind is proton bulk velocity. The spin period changed from ~4.3s to ~4.7s during the mission. IRM time stamps are UT at time of ground receipt. Thus for time-critical science, the IRM times need to be corrected by subtracting the light travel time from the spacecraft to the ground-station (at Weilheim in Germany apart special events requiring NASA DSN). For the transmission frequencies used, the vacuum light speed is appropriate. At apogee, this correction is more than a third of a second. There are no other known time delays. Time Column 1 The center of the accumulation time interval for the data point, in DA/MO/YR HR:MI:SS format. Temporal DT Column 2 The accumulation time for the measurement, normally one spin s Temporal Xgse Column 3 The X component of spacecraft location in GSE, in Re (Re=6378 km) Re 6.378e6>m Cartesian GSE 1 Xgse Component.I 1 Positional Ygse Column 4 The Y component of spacecraft location in GSE, in Re (Re=6378 km) Re 6.378e6>m Cartesian GSE 1 Ygse Component.J 1 Positional Zgse Column 5 The Z component of spacecraft location in GSE, in Re (Re=6378 km) Re 6.378e6>m Cartesian GSE 1 Zgse Component.K 1 Positional Rgse Column 6 Radial distance in SM, in Re (Re=6378 km) Re 6.378e6>m Spherical SM Magnitude Positional MLAT Column 7 Magnetic latitude in SM, in degrees Spherical SM DirectionAngle.ElevationAngle Positional MLT Column 8 Magnetic Local Time in SM, in hours hour 15>deg Spherical SM DirectionAngle.AzimuthAngle Positional Np Column 9 Number density of protons cm^-3 1e6>m^-3 Proton Moment Scalar NumberDensity Vp Velocity of protons km/s 1.0e3>m/s Cartesian GSE 3 Vx_p Component.I 1 Column 10 Vy_p Component.J 2 Column 11 Vz_p Component.K 3 Column 12 Proton Moment Vector Velocity Tp Column 13 Temperature of protons MK 1e6>K Proton Moment Scalar Temperature Ne Column 14 Number density of electrons cm^-3 1e6>m^-3 Electron Moment Scalar NumberDensity Ve Velocity of electrons The electron velocity is rarely correct, due to photoeletrons and/or missing real electrons at low energies. Please do not use for quantitative work. km/s 1.0e3>m/s Cartesian GSE 3 Vx_e Component.I 1 Column 15 Vy_e Component.J 2 Column 16 Vz_e Component.K 3 Column 17 Electron Moment Vector Velocity Te Column 18 Temperature of electrons MK 1e6>K Electron Moment Scalar Temperature