AIPS HELP file for MAPDIF in 31DEC19
As of Tue Dec 11 22:48:48 2018
Type: Adverb (Real(5,8))
Use: An Adverb for recording the differences between DDT
output maps and the standard reference maps.
The BITs differences are calculated as
BITS = -3.3219 * LOG(DIFF/PEAK).
DIFF is either the max difference between the images or
the RMS difference.
(LOG is the Base 10 Logarithm; 1/LOG(2) = 3.3219)
MAPDIF(1-2,.) => peak, mean bits
MAPDIF(3-5,.) => dx,dy,dT
MAPDIF(.,1-8) => UVMAP, UVBEAM, APCLN, APRES,
MXMAP, MXBEAM, MXCLN, IVTESS