AIPS HELP file for TBLC in 31DEC19
As of Fri Apr 19 20:15:35 2019
Type: Adverb (Real array, 7 elements)
Use: The array subscripts of the pixel at the Bottom Left
Corner of the desired subarray of the image. The first
value in TBLC gives the column number of the pixel; the
second value in TBLC gives the row number of the pixel.
The array may contain up to 7 dimensions. This adverb
is used with TV verbs, but is otherwise the same as BLC.
Null value: 7*0
Null value is usually assigned to (1,1,...), the bottom
left corner of the entire image.