AIPS HELP file for SORT in 31DEC18
As of Sun Jul 22 6:23:23 2018
Type: Adverb (String*2)
Use: Specify in which order data are to be sorted. Up to
two characters can be packed into SORT with the second
key to vary the fastest.
Legal values in task UVSRT are:
B => baseline number
T => time order
U => u spatial freq. coordinate
V => v spatial freq. coordinate
W => w spatial freq. coordinate
R => baseline length.
P => baseline position angle.
X => descending ABS(u)
Y => descending ABS(v)
Z => ascending ABS(u)
M => ascending ABS(v)
For example SORT='XY' is required by UVMAP.
Legal values in task DISKUSE are:
U => sort by user
B => sort by blocks used
Null Value: ' '
Null value assignment varies with verb or task.