27 4 Solar Wind Ion parameters from ACE/SWEPAM. Level 2 data, 1-hour averages. Please acknowledge the ACE/SWEPAM instrument team and the ACE Science Center http://www.srl.caltech.edu/ACE/ASC/level2/swepam_l2desc.html http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html year %4d 0 Year years 1997 2030 -9999.9 Linear Scale Integer Year of observation. Timestamp marks beginning of interval 1 Year day %3d 1 DayofYear days 1 366 -9999.9 Linear Scale Integer Day of Year of observation (starting from 1). Timestamp marks beginning of interval 1 DayofYear hr %2d 2 Hour hours 0 23 -9999.9 Linear Scale Hour of day of observation (starting from 0). Timestamp marks beginning of interval 1 Hour min %2d 3 Minute minutes 0 59 -9999.9 Linear Scale Minute of hour of observation (starting from 0). Timestamp marks beginning of interval 1 Minute sec %6.3f 4 Second seconds 0.0 60.0 -9999.9 Linear Scale Second of minute of observation. Timestamp marks beginning of interval 1 Second fp_year %13.8f 5 FP_Year years 1997.0 2030.0 -9999.9 Linear Scale Fractional Year of observation. Timestamp marks beginning of interval 1 FP_Year fp_doy %10.6f 6 FP_DayofYear days 1.0 367.0 -9999.9 Linear Scale Fractional Day of Year of observation. Timestamp marks beginning of interval 1 FP_DayofYear ACEepoch %13.3f 7 ACE Epoch seconds 0 1072742400 -9999.9 Linear Scale Epoch of observation - seconds since 00:00:00UT on Jan 1 1996. Timestamp marks beginning of interval 1 ACE Epoch proton_density %10.3f 8 Proton Number density cm^-3 0.0 200.0 -9999.9 Linear Scale Solar Wind Proton Number Density, scalar 1 Proton Number density proton_temp %11.4e 9 Proton Temperature Kelvin 1000.0 1100000.0 -9999.9 Log Scale radial component of the proton temperature 1 Proton Temperature He4toprotons %9.4f 10 alpha/proton ratio Ratio 0.0 10.0 -9999.9 Linear Scale alpha to proton density ratio 1 alpha/proton ratio proton_speed %9.2f 11 Solar Wind Proton Speed km/s 0.0 2500.0 -9999.9 Linear Scale Solar Wind Bulk Speed 1 Solar Wind Proton Speed x_dot_GSE %9.2f 12 X-component of Solar Wind Velocity (GSE) km/s -2500.0 2500.0 -9999.9 Linear Scale X-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average 1 X-component of Solar Wind Velocity (GSE) y_dot_GSE %9.2f 13 Y-component of Solar Wind Velocity (GSE) km/s -2500.0 2500.0 -9999.9 Linear Scale Y-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average 1 Y-component of Solar Wind Velocity (GSE) z_dot_GSE %9.2f 14 Z-component of Solar Wind Velocity (GSE) km/s -2500.0 2500.0 -9999.9 Linear Scale Z-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average 1 Z-component of Solar Wind Velocity (GSE) x_dot_RTN %9.2f 15 R-component of Solar Wind Velocity (RTN) km/s -2500.0 2500.0 -9999.9 Linear Scale radial-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average 1 R-component of Solar Wind Velocity (RTN) y_dot_RTN %9.2f 16 T-component of Solar Wind Velocity (RTN) km/s -2500.0 2500.0 -9999.9 Linear Scale Tangential-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average 1 T-component of Solar Wind Velocity (RTN) z_dot_RTN %9.2f 17 N-component of Solar Wind Velocity (RTN) km/s -2500.0 2500.0 -9999.9 Linear Scale Normal-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average 1 N-component of Solar Wind Velocity (RTN) x_dot_GSM %9.2f 18 X-component of Solar Wind Velocity (GSM) km/s -2500.0 2500.0 -9999.9 Linear Scale X-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average 1 X-component of Solar Wind Velocity (GSM) y_dot_GSM %9.2f 19 Y-component of Solar Wind Velocity (GSM) km/s -2500.0 2500.0 -9999.9 Linear Scale Y-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average 1 Y-component of Solar Wind Velocity (GSM) z_dot_GSM %9.2f 20 Z-component of Solar Wind Velocity (GSM) km/s -2500.0 2500.0 -9999.9 Linear Scale Z-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average 1 Z-component of Solar Wind Velocity (GSM) pos_gse_x %11.4e 21 X-component of S/C position (GSE) km -3.0E6 3.0E6 -1.0E31 Linear Scale X-component of ACE s/c position in GSE coordinates 1 X-component of S/C position (GSE) pos_gse_y %11.4e 22 Y-component of S/C position (GSE) km -3.0E6 3.0E6 -1.0E31 Linear Scale Y-component of ACE s/c position in GSE coordinates 1 Y-component of S/C position (GSE) pos_gse_z %11.4e 23 Z-component of S/C position (GSE) km -3.0E6 3.0E6 -1.0E31 Linear Scale Z-component of ACE s/c position in GSE coordinates 1 Z-component of S/C position (GSE) pos_gsm_x %11.4e 24 X-component of S/C position (GSM) km -3.0E6 3.0E6 -1.0E31 Linear Scale X-component of ACE s/c position in GSM coordinates 1 X-component of S/C position (GSM) pos_gsm_y %11.4e 25 Y-component of S/C position (GSM) km -3.0E6 3.0E6 -1.0E31 Linear Scale Y-component of ACE s/c position in GSM coordinates 1 Y-component of S/C position (GSM) pos_gsm_z %11.4e 26 Z-component of S/C position (GSM) km -3.0E6 3.0E6 -1.0E31 Linear Scale Z-component of ACE s/c position in GSM coordinates 1 Z-component of S/C position (GSM)