10 0 PARENT SITE 21 1 OBSERVATION SITE 32 2 BALLOON MANUFACTURE DATE 43 3 BALLOON LAUNCH POINT 54 4 SURFACE OBSERVATION 65 5 SURFACE OBSERVATION DISPLACEMENT FROM LAUNCH POINT 76 6 FLIGHT LEVEL OBSERVATION 87 7 FLIGHT LEVEL TERMINATION POINT 98 8 IFR CEILING AND VISIBILITY 109 9 MOUNTAIN OBSCURATION 1110 10 STRONG SURFACE WIND 1211 11 FREEZING LEVEL 1312 12 MULTIPLE FREEZING LEVEL 1413 13 INSTRUMENT MANUFACTURE DATE 1531 31 MISSING VALUE 16