Note:   "Clear sky irradiance" (Frouin et al 1989, JGR) 
             is given at nominal stations
         (47N 21W and 59.5N 21W) for ozone 0.3, water 2.5.
         PAR irradiance was measured by LiCor Type LI-190SA cosine sensor.
         Scalar (spherical) PAR was measured by LiCor type LI-193-SB 
             for MLML incubator.
 Ref:    JGOFS North Atlantic Bloom long track and vertical profiling results.
         W.W. Broenkow, R.E. Reaves and M.A. Yarbrough  MLML Tech Pub 90-1
         Recorded: 14:16:19  16-FEB-90