Copyright WDC C1 for STP at RAL.
The meaning of the fields in the OMNI database is as follows;
Date - 3 components: year (4 digits) month day Time - 3 components: hour minute seconds SC_IMF - spacecraft number for IMF data (see "Further information") SC_SW - spacecraft number for solar wind data (see "Further information") N_mag - Number of fine time scale IMF measurements used N_sw - Number of fine time scale solar wind measurements used FMA - Field magnitude average MAFV - Magnitude of the average field vector lat - latitude angle of average vector long - longitude angle of average vector Mag_field - 5 components: Bx GSE, By GSE, Bz GSE, By GSM, Bz GSM s_mag_b - error in field magnitude s_bt - error in ???? s_b - 3 components: errors in Bx, By, Bz T - plasma temperature Density - plasma density (ions/cm**3) Speed - solar wind bulk flow speed (km/s) Fl_long - bulk flow longitude (degrees - positive from west) GSE Fl_lat - bulk flow latitude (degrees - positive from south) GSE S_T - error in temperature S_den - error in density S_speed - error in bulk flow speed S_fl_long - error in bulk flow longitude S_fl_lat - error in bulk flow latitude