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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  
  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).  
  Copyright (C) 2021 East Asian Observatory
  -  ←Prev 
- AST
 A Library for Handling
 World
Coordinate Systems
 in Astronomy
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