reference|http://artefacts.ceda.ac.uk/badc_datadocs/surface/code.html
short_description|Cloud type
wmo_code|020012
long_description|Type of clouds
codeTYPE|I
@| Values
0|CI
1|CC
2|CS
3|AC
4|AS
5|NS
6|SC
7|ST
8|CU
9|CB
10|NO CH CLOUDS
11|CI FIB (UNC)
12|CI SPI SHEAF
13|CI SPI CUGEN
14|CI UNC/FIB
15|CI VEIL <45'
16|CI VEIL >45'
17|CS WHOLE SKY
18|CS NOT COVER
19|CH MOSTLY CC
20|NO CM CLOUDS
21|AS TR
22|AS OP / NS 
23|AC TR LEVEL 
24|AC TR PATCHY
25|AC TR BANDS 
26|AC CU(CB)GEN
27|AC TR LAYERS
28|AC CAS/FLO
29|AC CHAOTIC
30|NO CL CLOUDS
31|CU HUM/FRA
32|CU MED/CON
33|CU CAL
34|SC CUGEN
35|SC NOT CUGEN
36|SC NEB/FRA
37|ST/CU FRA
38|CU/SC LEVELS
39|CB CAP
40|-
41|-
42|-
43|-
44|-
45|-
46|-
47|-
48|-
49|-
50|-
51|-
52|-
53|-
54|-
55|-
56|-
57|-
58|-
59|CLOUD INVIS 
60|CH INVISIBLE
61|CM INVISIBLE
62|CL INVISIBLE