HET Data and Plots
Biweekly Time-series Survey Plots
ASCII Data Files
HET Data Documentation
The current release of HET data consists of 1-minute, 15-minute, Hourly, 12-hour, and Daily averaged electron and proton intensities. The intensity units are particles/(cm2-sr-sec-MeV), and intensities in the following energy ranges are provided:
- electrons: 0.7-1.4, 1.4-2.8, 2.8-4.0 MeV
- protons: 13.6-15.1, 14.9-17.1, 17.0-19.3, 20.8-23.8, 23.8-26.4, 26.3-29.7, 29.5-33.4, 33.4-35.8, 35.5-40.5, 40.0-60.0, 60.0-100.0 MeV
Caveats and Warnings
These data do not have any background corrections applied. There may be significant background contributions during solar quiet times, but it is not expected that these contributions are important during periods when the count rates are well above their minimum levels.
Data gaps in these HET files are not filled.
File Format Description
The files have names like BeH07Dec.15m (which can be parsed as spacecraft B, electrons and hydrogen, 2007 December, 15minute averages).
There is a header in each file which ends with the line '#End'. The header can be used to infer the data contained in the file; each subsequent line in the file, if it doesn't start with ';' , represents a date record; lines starting with a ';' are comment lines :
After the file header, the data records are defined as follows:
Column 1: Verse number (always '0')
Columns 2,3,4,5: Start date/time
Columns 6,7,8,9: End date/time
Column 10: Electron flux, 0.7 - 1.4 MeV, particles/(cm2-sr-sec-MeV)
Column 11: Uncertainty (sigma) for 0.7 - 1.4 MeV electron flux
Column 12: Electron flux, 1.4 - 2.8 MeV, particles/(cm2-sr-sec-MeV)
Column 13: Uncertainty (sigma) for 1.4 - 2.8 MeV electron flux
Column 14: Electron flux, 2.8 - 4.0 MeV, particles/(cm2-sr-sec-MeV)
Column 15: Uncertainty (sigma) for 2.8 - 4.0 MeV electron flux
Column 16: Proton flux, 13.6-15.1 MeV, particles/(cm2-sr-sec-MeV)
Column 17 Uncertainty (sigma) for 13.6-15.1 MeV proton flux
Column 18: Proton flux, 14.9-17.1 MeV, particles/(cm2-sr-sec-MeV)
Column 19: Uncertainty (sigma) for 14.9-17.1 MeV proton flux
and so on....
The information in the file header can be parsed as follows:
line 1 ASCIIThe next lines before the #End line specify the quantities which appear in each column of each data record.
line 2 comment (without ; )
line 3 start date/time for the data in the file
line 4 end date/time for the data in the file
line 5 ignore this line
line 6 #0 Rate - signifies the start of definition for verse 0; each data record starts with its verse number; in the present case the only verse which appears is verse 0
line 7 T2 field indicates that both a start and end time will be given for each verse 0
T1 field indicates that only a start time will be given for each verse 0
line 8 "F2 1e-005 5e+005 0.7 1.4 e" F2 field signifies that there will be a value given for electrons with energies between 0.7 and 1.4 MeV followed by the value of sigma for this value
line 11 "F2 1e-005 5e+005 13.6 15.1 H" similar to line 8 but for 13.6 to 15.1 MeV Hydrogen
The HET design, calibration and operation is described in detail in a Space Science Reviews paper by von Rosenvinge et al. (2008).