This data product contains 1-hour averaged values of solar wind proton flow speed, density, and temperature and corresponding thermal speed. The records also hold flow velocity vector components and direction angles in HERTN and RTN coordinates. Chi-squared and statistical uncertainties are included, as are various flags. STEREO position information is given in radial distance and HEE, HEEQ and HCI direction angles.

Beginning of time interval

Time of observation in Year, Day, and milliseconds

Inidcates possible error condition. 0=no known issues, 1=Processing error, 2=Level 1 error, 3=Data overflow, 4=Data outside 3-sigma limit (1 hr window). 5=Data gap (usually due to operations, 6=Jump in thermal speed, use caution, 7=Suspicious thermal speed, 8=Removed by hand.

Indicates how sensitive the density value is to method for determining background correction. 0=no issues (lt 5% effect). 1=minor issues (5-10% effect). 2=use with caution (gt 10% effect).

Indicates how many 1-min cycles were included in average

Indicates how many 1-min cycles were included in average.

Indicates how many 1-min cycles were included in average. Used for N/S flow angle (instrument coordinates only)

Indicates how many 1-min cycles were included in average. Used for velocity components, and angles (except ns_inst).

Indicates when instrument flow angles are not in nominal s/c orientation. 0=OK. 1=problem. [roll, yaw, pitch]

Source Flage for EW Data. 1st elem=source: 0=main (no data). 1=schan. 2=mixed (data from schan). 3=combination. 2nd elem=flag: 0=got peak in dist. 1=missed peak. 2=combination

Reduced Chi Square for 1D Maxwellian fit

Preliminary Statistical Uncertainty for the Angles

Proton Number Density. 1D Maxwellian Fit

Proton Bulk Speed. 1D Maxwellian Fit

Proton Temperature. 1D Maxwellian Fit

Proton Thermal Speed. 1D Maxwellian Fit

Proton Flow Angle North/South. 1D Maxwellian Fit. Instrument Coordinates. Angle gt 0 means flow from S of ecliptic plane (i.e. Vn gt 0). No aberration angle. No transformation.

Proton East/West Flow Angle. Instrument Coordinates. Angle gt 0 means flow from E of the sun (i.e. Vt gt 0). inst. No aberration angle. No transformation.

Proton Flow Angle North/South. 1D Maxwellian Fit. Angle gt 0 means flow from S of ecliptic plane (i.e. Vn gt 0). No aberration angle. No transformation.

Proton East/West Flow Angle. Angle gt 0 means flow from E of the sun (i.e. Vt gt 0). inst. No aberration angle. No transformation.

Proton Vr. 1D Maxwellian Fit. HERTN coordinates

Proton Vt. 1D Maxwellian Fit. HERTN coordinates

Proton Vn. 1D Maxwellian Fit. HERTN coordinates

Proton Flow Angle North/South. 1D Maxwellian Fit. Angle gt 0 means flow from S of ecliptic plane (i.e. Vn gt 0)

Proton East/West Flow Angle. Angle gt 0 means flow from E of the sun (i.e. Vt gt 0).

Proton Vr. 1D Maxwellian Fit. HERTN coordinates

Proton Vt. 1D Maxwellian Fit. HERTN coordinates

Proton Vn. 1D Maxwellian Fit. HERTN coordinates

Carrington Rotation Number

Spacecraft Longitude - Carrington

Heliocentric Distance

Spacecraft longitude - HEE

Spacecraft latitude - HEE

Spacecraft longitude - HEEQ

Spacecraft latitude - HEEQ

Spacecraft longitude - HCI

Spacecraft latitude - HCI