Microtops Time O3 Std Dev O3 7.20 283.3 0.950 7.20 294.3 1.475 7.98 293.9 4.117 8.48 297.1 5.325 8.95 290.1 1.411 9.43 307.0 3.694 9.93 314.0 4.039 10.05 314.1 0.379 11.10 309.1 7.036 11.50 327.6 5.791 12.00 316.9 2.004 12.18 322.5 0.702 13.43 321.5 3.515 14.05 321.4 0.379 14.60 324.8 0.416 14.97 324.4 0.379 15.92 315.8 0.819 16.33 316.2 1.792 16.48 314.7 0.058 16.88 315.8 0.885 17.85 303.3 0.058 Dobson 10 304 12 307 14 309 Sonde 11.5 302