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SCULIB_APPARENT_2_MP - Calculate mean place from a given apparent RA,Dec

Description:
This routine takes the apparent RA,Dec as input and converts them to the position in a specified output coordinate system. Allowed OUTPUT_COORDS are AZ, RJ, RB, GA, EQ. This is the reverse of SCULIB_CALC_APPARENT

Invocation:
CALL SCULIB_APPARENT_2_MP(RA_APP, DEC_APP, OUT_COORDS, LST, MJD, LAT_OBS, LONG, LAT, STATUS )

Arguments:

RA_APP = DOUBLE PRECISION (Given)
Apparent RA of point at date (radians)
DEC_APP = DOUBLE PRECISION (Given)
Apparent Dec
OUT_COORDS = CHARACTER $ *$ ($ *$) (Given)
LST = DOUBLE PRECISION (Given)
LST for requested coordinates (for AZ and HA)
MJD = DOUBLE PRECISION (Given)
Modified Julian date of observation
LAT_OBS = DOUBLE PRECISION (Given)
Latitude of observatory in radians. For JCMT this value is 3.46026051751D-1
LONG = DOUBLE PRECISION (Returned)
longitude of centre in input coord system (radians)
LAT = DOUBLE PRECISION (Returned)
latitude of centre in input coord system (radians)
STATUS = INTEGER (Given and returned)
Global status

Copyright
Copyright ©1995,1996,1997,1998,1999 Particle Physics and Astronomy Research Council. All Rights Reserved.


next up previous 623
Next: SCULIB_APPARENT_2_TP - calculate tangent plane coordinates from apparent RA, Decs
Up: Library APIs
Previous: SCULIB_ANALYSE_PHOTOM_JIGGLE - analyse the jiggle map made by a bolometer during a PHOTOM observation

SURF Programming Interface
Starlink System Note 72
Tim Jenness, John F. Lightfoot
Joint Astronomy Centre, Hilo, Hawaii
10 July 2000
E-mail:ussc@star.rl.ac.uk

Copyright © 2008 Science and Technology Facilities Council