Microtops Time O3 Std Dev O3 7.10 324.2 1.0 8.25 360.6 0.9 8.37 356.9 1.2 8.97 366.7 2.0 9.97 366.7 1.9 10.03 363.3 1.8 10.97 354.3 3.9 11.50 363.6 0.4 12.50 356.9 1.2 13.05 333.2 1.8 13.22 340.1 7.2 13.83 352.2 0.7 14.02 349.1 0.3 15.33 343.5 5.4 16.40 337.4 5.4 16.95 333.4 1.1 17.87 325.4 0.3 Dobson 10 345 12 335 14 335 Sonde 11.5 349