Description:
This routine converts a list of apparent RA,Decs to tangent plane offsets from a tangent
point whose position is also given in apparent RA,Dec. In addition, a rotation is applied to the tangent
plane so that it can be aligned with a coordinate system other than apparent RA,Dec, and a shift
is added to allow the map to be moved about in that output frame.
Invocation
CALL
SCULIB_APPARENT_2_TP (N_POS, BOL_XPOS, BOL_YPOS, RA_CEN, DEC_CEN, ROTATION,
SHIFT_DX, SHIFT_DY, STATUS)
Arguments
N_POS = INTEGER (Given)
the number
of positions to be converted
BOL_XPOS (N_POS) = DOUBLE PRECISION (Given and
returned)
apparent RA on input (radians), x tangent plane offset on output (radians)
BOL_YPOS (N_POS) = DOUBLE PRECISION (Given and returned)
apparent Dec on input
(radians), y tangent plane offset on output (radians)
RA_CEN = DOUBLE PRECISION
(Given)
apparent RA of tangent point (radians)
DEC_CEN = DOUBLE PRECISION
(Given)
apparent Dec of tangent point (radians)
ROTATION = DOUBLE PRECISION
(Given)
angle between output North and apparent North (radians, measured anticlockwise
from output North)
SHIFT_DX = DOUBLE PRECISION (Given)
value to be added to x
offsets (radians)
SHIFT_DY = DOUBLE PRECISION (Given)
value to be added to y
offsets (radians)
STATUS = INTEGER (Given and returned)
Copyright
Copyright
©1995,1996,1997,1998,1999 Particle Physics and Astronomy Research Council. All Rights Reserved.