2 2 OBSERVED MINUS MAXIMUM
3 3 OBSERVED MINUS MINIMUM
4 4 OBSERVED MINUS MEAN
5 5 OBSERVED MINUS MEDIAN
6 6 OBSERVED MINUS MODE
11 11 OBSERVED MINUS CLIMATOLOGY (ANOMALY)
12 12 OBSERVED MINUS ANALYZED VALUE
13 13 OBSERVED MINUS INITIALIZED ANALYZED VALUE
14 14 OBSERVED MINUS FORECAST VALUE
21 21 OBSERVED MINUS INTERPOLATED VALUE
22 22 OBSERVED MINUS HYDROSTATICALLY CALCULATED VALUE
63 63 MISSING VALUE
