1 1 MODEL GROUND SURFACE
2 2 STANDARD LEVEL
3 3 TROPOPAUSE LEVEL
4 4 MAXIMUM WIND LEVEL
5 5 SIGNIFICANT TEMPERATURE LEVEL
6 6 SIGNIFICANT HUMIDITY LEVEL
7 7 SIGNIFICANT WIND LEVEL
8 8 VERTICALLY INTERPOLATED LEVEL (THIS SHOULD BE SET TO 1 FOR POINTS ON THE VERTICAL PROFILE THAT FALL BETWEEN THE MODEL'SNATIVE VERTICAL LEVELS).
9 9 VIRTUAL STATION HEIGHT
10 10 RESERVED
11 11 RESERVED
