instrument-to-instrument variability

CL51

sometimes, profiles of both CL51 are almost identical, sometimes occur significant differences. Those differences are largest where aerosol layers are. But sometimes they also occur also in clean regions. See some examples of 13 June and 14 June.

Comment from Vaisala:
The main reason for this is the different firmware version of the two units involving also different overlap functions, see Special topics/Overlap. There is also a small difference in instrument sensitivity that could be adjusted. This adjustment has been proposed by Vaisala on 16.07.

20150613PS time00 01zr00 08km Smooth11 Ceilos 5 620150613PS time05 06zr00 08km Smooth11 Ceilos 5 620150613PS time06 07zr00 08km Smooth11 Ceilos 5 6
20150613PS time23 24zr00 08km Smooth11 Ceilos 5 6 20150614PS time00 01zr00 08km Smooth11 Ceilos 5 6 20150614PS time15 16zr00 08km Smooth11 Ceilos 5 6

Correlation plots:

20150613Correlation CL51RAO CL51CG  Low20150613Correlation CL51RAO CL51CG  2PBL20150613Correlation CL51RAO CL51CG  OverPBL