This is a description of the O3 file generated by the Vaisala software. File format: Pressure Air Temp RH Ht Ozone Ozone sensor Temp Seconds mb K % m mPa C Sample file: Time P T U Height O3 Tbox 1359.35 1013.28 300.733 66.6577 13.3385 2.17627 29.0844 1360.35 1012.94 301.299 67.9792 16.3238 2.18431 29.0939 1361.35 1012.27 300.51 68.4304 22.1567 2.19281 29.1033 1362.35 1011.54 300.028 69.2272 28.5518 2.21351 29.1092 In order to get the location of the sonde or the actual time at any particular level, the ozone file needs to be interpolated with the matching *EDT_LATLON* file. EDT file RS Serial #: B1074262 Station Name: WTEC Launch Time: 1430Z Launch Date: 15 JUN 06 EDT LEVEL OUTPUT with GPS Lat, Long, Alt Time Height Pressure Temp Dew P. RH W Spd W Dir Lat Long GPS Alt sec mtrs hPa øC øC Pct m/s Az ø Decimal ø Decimal ø mtrs -0.46 7.0 1014.0 26.65 21.9 75 6.0 90.0 -4.2170693 -22.9982169 15.1 0.54 11.1 1013.5 26.84 21.6 73 5.4 89.1 -4.2170755 -22.9982787 17.2 1.54 18.6 1012.7 27.19 21.2 70 4.2 86.6 -4.2170743 -22.9983109 24.5