Averaged HEND Data

Averaged HEND Data products are composed of averaged normalized counting rates, orbital neutron fluxes and the associated timing, spatial and engineering information. The AHDs consists of the cumulative background subtracted and normalized counts of neutrons at the four HEND detectors averaged over the 5x5 degree latitude longitude, 15-degree Ls. Please refer to the HEND processing document located in the documents directory that accompanies this release for a full description of how HEND spectra are processed to yield averaged normalized counting rates and orbital neutron fluxes. The timing and spatial data provided with each AHD record include the time and spatial range over which the average was generated.

Column Descriptions
Column Name Type Bytes Units
AREOCENTRIC_LATITUDE IEEE_REAL 4 DEGREE
Centerpoint areocentric latitude.
AREOCENTRIC_EAST_LONGITUDE IEEE_REAL 4 DEGREE
Centerpoint areocentric east longitude.
EXPOSURE IEEE_REAL 4 SECOND
Exposure time of given map pixel in seconds.
SD_NORMALIZATION IEEE_REAL 4
Normalization value which was used to normalize map for the Small Detector (counts/sec).
SD_RATE IEEE_REAL 4
The relative count rate (after normalization) which is observed in the given map pixel by the Small Detector.
SD_ERROR IEEE_REAL 4
The statistical error of the relative count rate in the Small Detector.
MD_NORMALIZATION IEEE_REAL 4
Normalization value which was used to normalize map for the Medium Detector (counts/sec).
MD_RATE IEEE_REAL 4
The relative count rate (after normalization) which is observed in given map pixel by the Medium Detector.
MD_ERROR IEEE_REAL 4
The statistical error of relative count rate in the Medium Detector.
LD_NORMALIZATION IEEE_REAL 4
Normalization value which was used to normalize map for the Large Detector (counts/sec).
LD_RATE IEEE_REAL 4
The relative count rate (after normalization) which is observed in given map pixel by the Large Detector.
LD_ERROR IEEE_REAL 4
The statistical error of relative count rate in the Large Detector.
IN_SC_LOW_NORMALIZATION IEEE_REAL 4
Normalization value which was used to normalize map for low energy channels in the inner scintillator (count/sec).
IN_SC_LOW_RATE IEEE_REAL 4
The relative count rate (after normalization) which is observed in given map pixel by the inner scintillator (low channels) .
IN_SC_LOW_ERROR IEEE_REAL 4
The statistical error of relative count rate in the inner scintillator (low channels).
IN_SC_HIGH_NORMALIZATION IEEE_REAL 4
Normalization value which was used to normalize map for high energy channels in the inner scintillator (count/sec).
IN_SC_HIGH_RATE IEEE_REAL 4
The relative count rate (after normalization) which is observed in given map pixel by the inner scintillator (high channels).
IN_SC_HIGH_ERROR IEEE_REAL 4
The statistical error of relative count rate in the inner scintillator (high channels).
EPITHERMAL_FLUX1 IEEE_REAL 4
Orbital epithermal neutron flux in energy range [100 eV-10 keV] (n/cm^2/sec).
EPITHERMAL_FLUX2 IEEE_REAL 4
Orbital epithermal neutron flux in energy range [10 keV-1 MeV] (n/cm^2/sec).
FAST_FLUX1 IEEE_REAL 4
Orbital fast neutron flux in energy range [1 MeV - 2.5 MeV] (n/cm^2/sec).
FAST_FLUX2 IEEE_REAL 4
Orbital fast neutron flux in energy range [2.5 MeV - 10 MeV] (n/cm^2/sec).
NEUTRON_NORMALIZATION IEEE_REAL 4
Normalization of neutron spectra.
ALPHA IEEE_REAL 4
Power index of neutron spectra.