Next: astSetStatus - Set the AST error status to an explicit value
Up: AST Function Descriptions
Previous: astSetFitsU - Store an undefined keyword value in a FitsChan
astSetRefPos
-
Set the reference position in a specified celestial coordinate system
- Description:
- This function
sets the reference position (see attributes RefRA and RefDec) using
axis values (in radians) supplied within the celestial coordinate
system represented by a supplied SkyFrame.
- Synopsis:
- void astSetRefPos( AstSpecFrame
this, AstSkyFrame
frm, double lon,
double lat )
- Parameters:
-
this
-
Pointer to the SpecFrame.
-
frm
-
Pointer to the SkyFrame which defines the celestial coordinate
system in which the longitude and latitude values are supplied.
If NULL
is supplied, then the supplied longitude and latitude values are
assumed to be FK5 J2000 RA and Dec values.
-
lon
-
The longitude of the reference point, in the coordinate system
represented by the supplied SkyFrame (radians).
-
lat
-
The latitude of the reference point, in the coordinate system
represented by the supplied SkyFrame (radians).
Next: astSetStatus - Set the AST error status to an explicit value
Up: AST Function Descriptions
Previous: astSetFitsU - Store an undefined keyword value in a FitsChan
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council