Description:
This routine takes the apparent
centre coords at the time of the observation and converts them to the output coordinate
system. In addition, the angle between the north direction in the output coordinate frame
and that in the apparent frame is calculated (measured anticlockwise from output north,
in radians).
Invocation
CALL SCULIB_CALC_OUTPUT_COORDS (RA_APP, DEC_APP, MJD,
OUTPUT_COORDS, LONG, LAT, STATUS)
Arguments
RA_APP = DOUBLE PRECISION
(Given)
apparent RA of map centre on MJD (radians)
DEC_APP = DOUBLE PRECISION
(Given)
apparent declination of map centre on MJD (radians)
MJD = DOUBLE PRECISION
(Given)
U1 of observation expressed as modified Julian day
OUTPUT_COORDS =
CHARACTER()
(Given)
output coordinated system; RB, RJ, RD, GA or EQ
LONG = DOUBLE PRECISION
(Returned)
longitude of map centre in output coord system (radians)
LAT = DOUBLE PRECISION
(Returned)
latitude of map centre in output coord system (radians)
STATUS = INTEGER (Given
and returned)
global status
Notes:
SLA routines are used to perform the coordinate conversions.
Copyright
Copyright ©1995,1996,1997,1998,1999 Particle Physics and Astronomy Research Council.
All Rights Reserved.