AIPS HELP file for COODEFIN in 31DEC22
As of Tue Jul 5 5:55:55 2022
COODEFIN: Verb to redefine the RA and Dec coordinates
INNAME Image name(name).
INCLASS Image name(class).
INSEQ 0.0 9999.0 Image name(seq. #). 0=>high
INDISK 0.0 9.0 Disk drive #. 0=>any
COORDINA Reference coordinate
COOINC Axis increments in arc sec
0 => no change
COOREF Reference pixel location,
both = 0 => no change
ROTATE Coordinate rotation in deg
< -180 => no change
Use: COODEFINE is used to alter the celestial axis descriptions in
the catalogue map header.
INNAME......Image name(name). Standard defaults.
INCLASS.....Image name(class). Standard defaults.
INSEQ.......Image name(seq. #). 0 => highest.
INDISK......Disk drive # of image. 0 => any
COORDINA....The X and Y coordinates are found as:
Xpos = abs(CO(1)) + abs(CO(2))/60 + abs(CO(3))/3600
if any of CO(1), CO(2), CO(3) < 0: Xpos = -Xpos
Ypos = abs(CO(4)) + abs(CO(5))/60 + abs(CO(6))/3600
if any of CO(4), CO(5), CO(6) < 0: Ypos = -Ypos
These are used here for RA, Dec (or other celestial
systems such a GLON/GLAT) in sexagesimal notation. The
units are degrees, minutes and seconds of arc except for
RA in which they are hours, minutes, and seconds of time.
COOINC......Axis increment to set (RA/Dec). 0 => no change.
Units are arc seconds. Be careful of sign.
COOREF......Reference pixel location (Ra/Dec). If both are 0
exactly, then no change is made.
ROTATE......Coordinate rotation of the celestial coordinates from
the axis coordinates in degrees. < -180 => no change.