Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120229T035223 ssmi15 179.0 NaN% NaN NaN n/a   35.0 kts
20120301T004617 ssmis17 56.7 28.8% 9.6 -9.6 n/a   35.0 kts
20120301T010048 ssmis16 56.7 26.0% 14.2 -14.2 n/a   35.0 kts
20120301T023734 tmi 23.4 31.5% 6.4 -6.4 n/a   35.0 kts
20120301T031840 ssmis18 23.4 49.3% 0.0 -0.0 n/a   35.0 kts
20120301T034041 ssmi15 212.4 0.0% 2.0 -2.0 n/a   35.0 kts
20120301T133646 ssmis16 12.2 16.4% 0.2 -0.2 n/a   31.5 kts
20120301T134257 ssmis17 212.4 4.1% 4.1 -4.1 n/a   31.5 kts
20120301T161708 ssmi15 23.4 32.9% 0.0 -0.0 n/a   30.3 kts
20120301T161708 ssmis18 101.2 0.0% 0.0 -0.0 n/a   30.3 kts
20120301T172850 tmi 12.2 50.7% 0.0 -0.0 n/a   30.0 kts
20120302T004609 ssmis17 23.4 52.0% 0.0 -0.0 n/a   30.0 kts
20120302T014057 tmi 5.0 0.0% 0.0 -0.0 n/a   30.0 kts
20120302T031924 ssmis18 23.4 34.2% 0.0 -0.0 n/a   30.0 kts
20120302T131219 ssmis17 201.2 1.4% 4.5 -4.5 n/a   27.9 kts
20120302T152934 ssmis18 34.5 0.0% 4.8 -4.8 n/a   26.6 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.