IBEX-Lo TOF Level 2 data is organized by three basic criteria.  First by orbit, then by energy, finally by species.  For detailed and comprehensive orbit information including satellite positioning and pointing, please refer to the ISOC.  The center of each of the 8 possible energy bands is included in each level 2 data product.  Data is sorted into broad Oxygen and Hydrogen categories.  The Oxygen categorization contains both Oxygen and Carbon counts.  For time-of-flight files, there are also complete Oxygen/Carbon/Hydrogen histograms.  these are labeled as 'All'.

  For each of these three categories, the data has been compiled into a Time-of-flight histogram, and an angular histogram.  In both cases all data from a single orbit, energy, and species has been integrated over the entire time period of the orbit, and this time in seconds included in the data product.
  
  Time of Flight Histograms:
  
  Filename convention:
  IBEX_Lo_Level2_TOF2_o[NNNN]_e[M]_[SPECIES]_v1_1.csv
                         ^      ^      ^
                         |      |      |
                 orbit# --      |      -- Oxygen, Hydrogen, or All
                  Energy Step #-- 
  
  The definition of the center of each of the 8 energy steps is as follows:
  
  Energy      Hydrogen            Oxygen
  Step       Energy (eV)        Energy (eV)
  1             15                 16
  2             29                 32
  3             55                 65
  4            110                132
  5            209                279
  6            439                601
  7            872               1206
  8           1821               2361
  
  Time of flight (TOF) histograms are accumulated in 0.33ns steps from 0 to 340ns (for a total of 1024 steps).  This represents the resolution of the TOF in the CEU.  This data is culled from the raw TOF2 data from IBEX-Lo.  For a detailed description of the various TOFs, refer to the latest IBEX-LO TOF reference document, available on the ISOC.  Like all Level2 data of this version, this data is integrated over the entire orbit.

  Time of Flight file structure:  (All values are separated by commas)

IBEX-Lo,Level2,Version,v1_1
TOF2,Histogram,Data,Species:,[SPECIES]
Created,on:,[DAY] [MONTH] [DAY] [HH]:[MM]:[SS] [YEAR]
Orbit,[ORBIT],Energy,Step,e[E-STEP],[ENERGY],eV
Total,Integration,Time=,[TIME(SECONDS)]
****************************************
TOF2(ns),counts
T1,C1         <-------------- C1 = counts between T1 and T2.  T[X] measured in nanoseconds.
T2,C2
T3,C3
T4,C4
.
.
Tn,Cn
  
  Angular Histograms:
  
  Filename convention:
  IBEX_Lo_Level2_Angular_o[NNNN]_e[M]_[SPECIES]_v1_1.csv
                            ^      ^      ^
                            |      |      |
                    orbit# --      |      -- Oxygen or Hydrogen
                     Energy Step #-- 
                     
  Angular histograms are accumulated in 1 degree steps over the entire spin of the spacecraft.  Values are given for the NEP angle (0 to 360), Ecliptic Latitude (-90 to 90) for the RAM (NEP 0 to 180) and ANTIRAM (NEP 180-360) directions pointing direction, and Ecliptic Latitude (-90 to 90) for the flow direction.
  
  Angular file structure:  (All values are separated by commas)
  
IBEX-Lo,Level2,Version,v1_1
Angular,Histogram,Data,Species:,[SPECIES]
Created,on:,[DAY] [MONTH] [DAY] [HH]:[MM]:[SS] [YEAR]
Orbit,[ORBIT],Energy,Step,e[E-STEP],[ENERGY],eV
Total,Integration,Time=,[TIME(SECONDS)]
****************************************
NEP(degrees),Look Ecliptic Latitude(degrees),Flow Ecliptic Latitude(degrees),counts
NA1,LEL1,FEL1,C1           <-------------- C1 = counts in a 1 degree bin CENTERED on NA1, LEL1 and FEL1
NA2,LEL2,FEL2,C2
NA3,LEL3,FEL3,C3
NA4,LEL4,FEL4,C3
.
.
NAn,LELn,FELn,Cn

***********************************************
  Improvements to be made in future versions:
  
  Time-of-flight histograms are binned in a different way from the more intuitive angular bins.  In the next version these will both be binned in the exact same way.  Angular bins are labeled at the center of the bin range, while TOF bin are labeled at the start of the bin.  This confusion will be cleared up by the time of final data delivery.