function norh_gt_pixsd, index

;+
; NAME:
;       norh_gt_pixsd
;
; PURPOSE:
;       Return the pixel size of the dirty maps
;       in units of arcsec
;
; CALLING SEQUENCE:
;       sec_per_pix_dty=norh_gt_pixsd(index)
;
; INPUTS:
;       index: index structure
;
; HISTORY:
;       Writtern 1998-09-17 TY
;       Modified 2000-04-19 TY based on V. Grechnev's suggestion
;
;-

  out = index.norh.sec_per_pix_dty

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

return,out

end