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Description: 
 This function returns the reference position (specified
by attributes 
RefRA and 
RefDec) converted to the celestial coordinate system
represented by a supplied 
SkyFrame. The celestial longitude and latitude
values are returned in radians.  
Synopsis 
 void astGetRefPos( AstSpecFrame
this,
AstSkyFrame frm,
double lon,
double lat
)  
 Parameters: 
  this  
  frm  
 Pointer to the SkyFrame
which defines the required celestial coordinate system. If NULL is supplied, then the
                                                                                       
                                                                                       
longitude and latitude values are returned as FK5 J2000 RA and Dec values.  
  lon  
 A
pointer to a double in which to store the longitude of the reference point, in the
coordinate system represented by the supplied SkyFrame (radians).  
  lat  
 A
pointer to a double in which to store the latitude of the reference point, in the
coordinate system represented by the supplied SkyFrame (radians).  
    Notes: 
 Copyright (C) 2021 East Asian Observatory
  -  ←Prev 
- AST
 A Library for Handling
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Coordinate Systems
 in Astronomy
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