STEREO LET Level 1 sectored 6 - 12 MeV/nuc 4He intensities for ahead spacecraft, for April 2015
Verified Data - OK to distribute
File Created: Thu Jul 23 12:07:39 PDT 2015
Created by: Caltech Space Radiation Lab
10Min-averaging Software Version: 04
Level 1 software version: 11
Time Resolution: 10-minute
Note: Timestamps mark Beginning of averaging interval.
These data are binned into 16 look-directions (sectors). 
Detailed information about these sectored data may be found at
http://www.srl.caltech.edu/STEREO/docs/LET_Level1.html
Column 1: Year
Column 2: Day of year (fractional)
Column 3: Hour of day
Column 4: Minute of hour
Column 5: Second of minute
Column 6: LET Livetime (seconds)
Column 7 - 22: 16 sectored 4He intensities, 6 - 12 MeV/nuc (1/(cm^2 s sr MeV/nuc))
Column 23 - 38: 16 sectored 4He counts (counts/minute)
Column 39 - 54: 16 sectored 4He statistical uncertainties  (1/(cm^2 s sr MeV/nuc))
Bad/missing data are filled as follows:
     -9999.9 for floating-point data
     -9999 for integer data
10-minute Averages and Uncertainties are calculated as follows:
     I = Sum(Ii)/M
     U(I) = sqrt ( Sum( Ii^2/Ni ) ) / M
     I is the 10-minute average intensity.
     U(I) is the uncertainty in the calculated average intensity.
     Ii is the intensity for minute i in one of the energy bins.
     Ii^2 = Ii * Ii  (in case the notation is confusing...)
     Ni is the counts for minute i in one of the energy bins.
     M is the number of good 1-minute records in the averaging interval.
The total number of counts in each 10-minutes is also provided.
BEGIN DATA