Magsat half second data from January 1980 to February 1980 (ASCII) FILE FORMAT DESCRIPTION /AE/ Auroral indices of geomagnetic activity (1-min) /IMP8/ Interplanetary magnetic field data from IMP-8 (15-sec) /ISEE1_2/ Magnetic field data from high-altitude spacecraft ISEE-1 and 2 (1-min) /ISEE3/ Interplanetary magnetic field data from ISEE-3 (1-min) /MAGSAT/ magsat.doc Format explanation 80_01_01.dat-80_02_29.dat MAGS Daily half second files /OMNI/ Interplanetary magnetic field and solar wind data, and geomagnetic indices (OMNI-database; hourly)