function norh_gt_pixsz,index

;+
; NAME:
;       norh_gt_pixsz
;
; PURPOSE:
;       Return the pixel size 
;       in units of arcsec.
;
; CALLING SEQUENCE:
;       pixsz=norh_gt_pixsz(index)
;
; INPUTS:
;       index: index structure
;
; HISTORY:
;       Writtern 1998-05-29 TY
;       Modified 2000-04-19 TY based on V. Grechnev's suggestion
;-


  out = index.norh.sec_per_pix

if n_elements(out) eq 1 then out=out(0)

return,out
end