AIPS HELP file for EPOSWTCH in 31DEC19
As of Tue Jan 22 1:22:30 2019
EPOSWTCH: Verb to switch between B1950 and J2000 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.
Use: EPOSWTCH may be used to swithc the epoch of the coordinates in the
image or UV header from B1950 (or whatever) to J2000 and back to
B1950. The conversion is of adequate accuracy for normal imaging
but should not be used in astrometric circumstances. The
conversion assumes that it may be represented by a shift of the
coordinates of the reference pixel and a slight rotation. This is
not correct at the highest accuracies.
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.