Next: Column DETCODE
The integer column named NDET contains the sequence number for the detector
Each detector channel has its own row in this sub-table.
For multichannel instruments that devote one detector to each passband,
these rows can be considered a natural continuation of the rows of the passband
In this case, the NBAND and NDET columns should have the same values within
The A*16 column named DETNAME is optional, and is provided only for the user's
As its name indicates, it can hold a character string naming the detector.