function resynth_background,l1c
  ;Put the background back into an image, based on the zenith viewing geometry. This means that the
  ;view angle is zero, the zenith angle is what it is, and the scattering angle is 180-zenith
  sza=*(l1c.zenith_angle[0])
  cnp=*(l1c.cloud_no_phase[0])
  sva=sza*0
  ssa=180-sza
  cwp=mie_phase(ssa,30)*cnp
  return,calc_albedo(39,0.608,rayleigh_phase(ssa),sva,sza,/correction_sva1)+cwp
end