;+
; return the hour angle (HA) in degrees using the given data_container
;
; @param dc {in}{required}{type=data_container} The data_container to
; use.
;
; @returns HA in degrees.
;
; @version $Id: getha.pro,v 1.2 2004/11/17 21:47:51 bgarwood Exp $
;-
function getha, dc
   ; will need to do better to ensure longitude_axis is really RA here
   ha=(dc.lst/3600.0) - dc.longitude_axis/15.0
   ha = (ha gt 12.) ? (ha-24.) : ha ; note use of the Ternary operator...!
   ha = (ha lt -12.) ? (ha+24.) : ha
   return, ha
end