Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning NHC estimate
20110817T053411 tmi 12.2 86.3% 3.9 -18.9 n/a   34.5 kts
20110817T085300 amsre NaN 53.4% 0.0 -0.0 n/a   39.4 kts
20110817T123951 ssmis17 NaN 49.3% 9.9 -9.9 n/a   46.1 kts
20110817T202517 tmi 23.4 8.2% 17.6 17.6 n/a   59.4 kts
20110818T011635 ssmis16 NaN 54.8% 6.2 6.2 n/a   66.3 kts
20110818T032952 ssmis18 NaN 48.0% 0.0 0.0 n/a   68.1 kts
20110818T043635 tmi 12.2 100.0% 25.6 40.6 >65 kts   68.9 kts
20110818T093537 amsre 5.0 100.0% 28.1 43.1 >65 kts   73.7 kts
20110818T135103 ssmis16 NaN 45.2% 0.0 0.0 n/a   75.0 kts
20110818T160421 ssmis18 NaN 63.0% 4.9 4.9 n/a   75.0 kts
20110818T202858 amsre NaN 0.0% 1.3 1.3 n/a   73.6 kts
20110818T210536 tmi NaN 0.0% 1.6 1.6 n/a   73.0 kts
20110819T012144 ssmis17 NaN 49.3% 0.0 0.0 n/a   68.9 kts
20110819T031826 ssmis18 NaN 84.9% 6.8 6.8 n/a   67.2 kts
20110819T135518 ssmis17 NaN 26.0% 1.7 1.7 n/a   57.1 kts
20110819T155229 ssmis18 NaN 8.2% 6.5 -6.5 n/a   53.3 kts
20110819T201129 tmi NaN 0.0% 4.1 -4.1 n/a   47.9 kts
20110820T010909 ssmis17 NaN 6.8% 0.2 -0.2 n/a   44.0 kts
20110820T042230 tmi NaN 0.0% 4.7 -4.7 n/a   41.4 kts
20110820T092304 amsre 12.2 24.7% 12.4 -12.4 n/a   36.5 kts
20110820T134232 ssmis17 NaN 27.4% 2.0 -2.0 n/a   35.0 kts
20110820T205213 tmi 123.4 NaN% NaN NaN n/a   32.7 kts
20110820T215526 amsre 112.3 NaN% NaN NaN n/a   31.4 kts
20110821T005645 ssmis17 NaN 1.4% 2.7 -2.7 n/a   30.0 kts
20110821T022055 ssmis16 NaN 0.0% 2.5 -2.5 n/a   30.0 kts
20110821T043612 ssmis18 34.5 NaN% NaN NaN n/a   30.0 kts
20110821T100553 amsre NaN 0.0% 1.4 -1.4 n/a   30.0 kts
20110821T132944 ssmis17 NaN 0.0% 2.2 -2.2 n/a   30.0 kts
20110821T145347 ssmis16 NaN 0.0% 2.6 -2.6 n/a   30.0 kts
20110821T170928 ssmis18 34.5 NaN% NaN NaN n/a   29.3 kts
20110821T195639 tmi NaN 0.0% 2.1 -2.1 n/a   27.1 kts
20110822T020829 ssmis16 NaN 0.0% 0.6 -0.6 n/a   25.0 kts
20110822T040725 tmi NaN 0.0% 1.9 -1.9 n/a   25.0 kts
20110822T042405 ssmis18 NaN 0.0% 3.8 -3.8 n/a   25.0 kts
20110822T165724 ssmis18 NaN 0.0% 4.0 -4.0 n/a   23.1 kts
20110823T021234 ssmis17 NaN 0.0% 1.1 -1.1 n/a   20.0 kts
20110823T031113 tmi NaN 0.0% 3.8 -3.8 n/a   20.0 kts
20110823T041210 ssmis18 NaN 0.0% 1.5 -1.5 n/a   20.0 kts
20110823T144547 ssmis17 NaN 0.0% 3.9 -3.9 n/a   20.0 kts

Key:

Diameter values indicate the estimated surface eyewall diameter (the MI eyewall edge diameter minus 10 km).

Diameter values are red if Ring % <= 65, yellow/brown if Ring % <= 85 and green if Ring % > 85.

"Ring %" is the percentage of the "ring" (eyewall inner boundary) that is 1) colder than the "hot spot" (warmest eye pixel) in the eye by 20K, or 2) the percentage that is a) colder than 232K and b) colder than the "hot spot" by 10K, whichever is greater.

"Tb diff" is the difference between the "hot spot" (warmest eye pixel) and the warmest pixel on the eyewall.

Scores are listed as negative, and not used, when the JTWC or NHC estimated Vmax is <50 kts in order to rule out weak but highly symmetric TCs.