;+
; NAME:
;     GET_PHZCAL_STRUCT
; PURPOSE:
;     Define structure necessary for holding reference phase calibration information
;     from the PHZCAL segment.
; CATEGORY:
;     OVRO APC DATA ANALYSIS
; CALLING SEQUENCE:
;     phzcal = get_phzcal_struct()
; INPUTS:
; OPTIONAL (KEYWORD) INPUT PARAMETERS:
; ROUTINES CALLED:
; OUTPUTS:
;     phzcal    an empty phase calibration structure
; COMMENTS:
;     This is a trivial structure, but I am using a structure to keep the
;     parallelism with TPCAL and AMPCAL structures, which are slightly more
;     complex.
; SIDE EFFECTS:
; RESTRICTIONS:
; MODIFICATION HISTORY:
;     Written 27-Jul-1999 by Dale E. Gary
;     20-Feb-2006  DG
;       Added a third index to PHASE to account for both R and L
;       data--a result of all dishes having R and L.
;-
function get_phzcal_struct

   ; Define phase calibration structure
   phzcal = {phzcal, phase: fltarr(10,86,2)}  ; Phases (deg) for 10 feeds at 86 frequencies

return,phzcal
end