1.3.0 spase://VHO/NumericalData/ACE/SWEPAM/HDF_PT1H ACE Solar Wind Electron Proton Alpha Monitor (SWEPAM) 1-Hour Level 2 Data in HDF Format 2007-11-27T22:42:26Z 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 spase://nssdc/person/67893 TechnicalContact ACE SWEPAM Level 2 data Home Page http://www.srl.caltech.edu/ACE/ASC/level2/swepam_l2desc.html ACE Science Center site hosting instrument information, data release notes, as well as web utilities for plotting and downloading data Rules of use, and caveats http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html ACE level 2 data rules of use, and caveats spase://VMO/Repository/ACEScienceCenter Online Open http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SWEPAM.html Repository of ACE SWEPAM data at ACE Science Center HDF4 swepam_level2_data_1hr Level 2 spase://VHO/Instrument/ACE/SWEPAM ThermalPlasma 1998-02-04T00:00:12Z P2M PT1H Heliosphere.Inner Heliosphere.NearEarth The quality of ACE level 2 data is such that it is suitable for serious scientific study. However, to avoid confusion and misunderstanding, it is recommended that users consult with the appropriate ACE team members before publishing work derived from the data. The ACE team has worked hard to ensure that the level 2 data are free from errors, but the team cannot accept responsibility for erroneous data, or for misunderstandings about how the data may be used. This is especially true if the appropriate ACE team members are not consulted before publication. At the very least, preprints should be forwarded to the ACE team before publication. Year year Integer Year of observation. Timestamp marks beginning of interval years 1997 2030 -9999.9 %4d Linear Scale Temporal DayofYear day Integer Day of Year of observation (starting from 1). Timestamp marks beginning of interval days 1 366 -9999.9 %3d Linear Scale Temporal Hour hr Hour of day of observation (starting from 0). Timestamp marks beginning of interval hours 0 23 -9999.9 %2d Linear Scale Temporal Minute min Minute of hour of observation (starting from 0). Timestamp marks beginning of interval minutes 0 59 -9999.9 %2d Linear Scale Temporal Second sec Second of minute of observation. Timestamp marks beginning of interval seconds 0.0 60.0 -9999.9 %6.3f Linear Scale Temporal FP_Year fp_year Fractional Year of observation. Timestamp marks beginning of interval years 1997.0 2030.0 -9999.9 %13.8f Linear Scale Temporal FP_DayofYear fp_doy Fractional Day of Year of observation. Timestamp marks beginning of interval days 1.0 367.0 -9999.9 %10.6f Linear Scale Temporal ACE Epoch ACEepoch Epoch of observation - seconds since 00:00:00UT on Jan 1 1996. Timestamp marks beginning of interval seconds 0 1072742400 -9999.9 %13.3f Linear Scale Temporal Proton Number density proton_density Solar Wind Proton Number Density, scalar Np is the proton number density in units of cm-3, as calculated by integrating the ion distribution function. cm^-3 0.0 200.0 -9999.9 %10.3f Linear Scale Proton Moment NumberDensity Proton Temperature proton_temp radial component of the proton temperature The radial component of the proton temperature is the (1,1) component of the temperature tensor, along the radial direction. It is obtained by integration of the ion (proton) distribution function. Kelvin 1000.0 1100000.0 -9999.9 %11.4e Log Scale Proton Moment Temperature alpha/proton ratio He4toprotons alpha to proton density ratio Alpha ratio (Na/Np) - is the ratio of the number density of helium++ ions to the number density of protons. Ratio 0.0 10.0 -9999.9 %9.4f Linear Scale AlphaParticle Proton Ratio NumberDensity Solar Wind Proton Speed proton_speed Solar Wind Bulk Speed Vp is the solar wind proton speed, or more generally just the solar wind (bulk) speed. It is obtained by integrating the ion (proton) distribution function. km/s 0.0 2500.0 -9999.9 %9.2f Linear Scale Proton Moment Scalar Velocity X-component of Solar Wind Velocity (GSE) x_dot_GSE X-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSE Proton Moment Component.X Velocity Y-component of Solar Wind Velocity (GSE) y_dot_GSE Y-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSE Proton Moment Component.Y Velocity Z-component of Solar Wind Velocity (GSE) z_dot_GSE Z-component of Solar Wind Velocity in GSE cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSE Proton Moment Component.Z Velocity X-component of Solar Wind Velocity (GSM) x_dot_GSM X-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSM Proton Moment Component.X Velocity Y-component of Solar Wind Velocity (GSM) y_dot_GSM Y-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSM Proton Moment Component.Y Velocity Z-component of Solar Wind Velocity (GSM) z_dot_GSM Z-component of Solar Wind Velocity in GSM cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian GSM Proton Moment Component.Z Velocity R-component of Solar Wind Velocity (RTN) x_dot_RTN radial-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian RTN Proton Moment Component.X Velocity T-component of Solar Wind Velocity (RTN) y_dot_RTN Tangential-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian RTN Proton Moment Component.Y Velocity N-component of Solar Wind Velocity (RTN) z_dot_RTN Normal-component of Solar Wind Velocity in RTN cartesian coordinates, 64-second average km/s -2500.0 2500.0 -9999.9 %9.2f Linear Scale Cartesian RTN Proton Moment Component.Z Velocity X-component of S/C position (GSE) pos_gse_x X-component of ACE s/c position in GSE coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSE Positional Y-component of S/C position (GSE) pos_gse_y Y-component of ACE s/c position in GSE coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSE Positional Z-component of S/C position (GSE) pos_gse_z Z-component of ACE s/c position in GSE coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSE Positional X-component of S/C position (GSM) pos_gsm_x X-component of ACE s/c position in GSM coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSM Positional Y-component of S/C position (GSM) pos_gsm_y Y-component of ACE s/c position in GSM coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSM Positional Z-component of S/C position (GSM) pos_gsm_z Z-component of ACE s/c position in GSM coordinates km -3.0E6 3.0E6 -1.0E31 %11.4e Linear Scale 1e3>m Cartesian GSM Positional