Column assignment is as follow:

* Radar_Cldtop_doy.txt
	1 hour
	2 Cloud top height (km)
	3 CLoud top height std (km)
	4 Cloud top height 1/2 width distribution (km)
	5 Mean dBZ
	6 Mean dBZ-noise
	7 Mean Dopper veloc (+ down)
	8 Total number range gates with significant signal (0.3 s, 1hr)
	9 Cloud thickness (km)