Averaged Neutron Data

The AND product contains average fluxes for epithermal, thermal, and fast neutrons. The data is presented in a table format for a 5 degree by 5 degree grid. There are 36 latitude bands and 72 longitude bands, thus 2592 grid cells. Each cell corresponds to one row in the table. The first 72 rows in the table are the data for the 5 degree latitude band centered at 87.5 degrees north latitude, the second 72 rows are the data for the band centered at 82.5 degrees north latitude, and so on. Within each band, longitude increases eastward from the cell centered at 2.5 degrees east longitude to the cell centered at 357.5 degrees east longitude.

Product Errata

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.
CTHERM IEEE_REAL 4
Averaged Thermal neutron count rate (counts per second) over the 5x5 degree latitude longitude map bin and 15-degrees L-sub-S.
NTHERM IEEE_REAL 4
Number of collection intervals per map bin.
STHERM IEEE_REAL 4
Standard deviation in the thermal count rate (counts per second).
CEPI IEEE_REAL 4
Averaged Epithermal neutron count rate (counts per second) over the 5x5 degree latitude longitude map bin and 15-degrees L-sub-S.
NEPI IEEE_REAL 4
Number of collection intervals per map bin.
SEPI IEEE_REAL 4
Standard deviation in the epithermal count rate (counts per second).
CFAST IEEE_REAL 4
Averaged Thermal neutron count rate (counts per second) over the 5x5 degree latitude longitude map bin and 15-degrees L-sub-S.
NFAST IEEE_REAL 4
Number of collection intervals per map bin.
SFAST IEEE_REAL 4
Standard deviation in the fast count rate (counts per second).