;.r sky_variation.pro
;
;
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
;
; **************************** COMPARING THE SKY ***********************************************
;The following will plot normalized values of sky nightglow
; each exposure is 3 min, fixed altitude of 30 deg
; time is the hour before dawn.
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

READCOL, 'sky.0014_5577.dat', lambda1, flux1, FORMAT='F,F'



  LOADCT,39
   SET_PLOT,'PS'
   DEVICE, FILENAME = 'sky_variation.ps',/COLOR,/LANDSCAPE,YSIZE=7,XSIZE=9.5,/COURIER,/INCHES

         plot, lambda1, flux1,  xrange=[-1, 1], /xstyle, yrange=[5576.5578.5], /ystyle, psym=0

           oplot, lambda2, flux2, linestyle = 2, color = 50