https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/solarwind_min_old/ 00readme.txt These 1-min. plasma data are a subset of data at the MIT website: ftp://space.mit.edu/pub/plasma/imp/fine_res/. The MIT-resident data include moments-based and fits-based parameters, for both solar wind and magnetosheath orbit phases. (NSSDC provides these data as annual files at https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/sw_msheath_min/. (They are accessible from MIT but in shorter files.) The fits-based, solar wind-only data were reformatted at NSSDC, reorganized into annual files and placed at the nssdc site: https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/solarwind_min/ These data are nominally all from the solar wind phases of the IMP orbit. The day number convention used is January 1 = day 1. Thermal speed is the most probable thermal speed (i.e., the square root of [2kT/m(proton)]). The flow azimuth (E/W) angle is positive for flow from west of the sun. The flow elevation (N/S) angle is positive for flow from south of the sun. The aberration in velocity due to Earth's motion around the Sun has been removed. Flow cartesian components may be directly computed from these angles and the flow speed. The contents/format of records are: Word Format Description 1 I4 Year 2 I4 Day 3 I3 Hour 4 I3 Minute 5 I3 Second 6 F7.2 Spacecraft position Xgse, Re 7 F7.2 Spacecraft position Ygse, Re 8 F7.2 Spacecraft position Zgse, Re 9 F7.2 Spacecraft position Ygsm, Re 10 F7.2 Spacecraft position Zgsm, Re 11 F7.1 Flow Speed, km/s 12 F7.1 Flow azimuth, deg 13 F7.1 Flow elevation, deg 14 F7.1 Thermal speed, km/s 15 F7.1 Proton Density, N/cm^3 ---------------------------------------- Related data and directories: SPDF Data and Orbits Services -------------- SPDF Contact: Natalia Papitashvili , Please acknowledge NASA's Space Physics Data Facility for data usage. Authorizing NASA Official: Dr. R.E. McGuire, Head, SPDF, NASA Goddard Space Flight Center 301-286-7794, e-mail: Robert.E.McGuire@nasa.gov -----------------------------------------------------------------------