Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120328T061049 ssmi15 179.0 0.0% 2.2 -2.2 n/a   35.0 kts
20120329T055427 ssmi15 23.4 28.8% 4.8 -4.8 n/a   35.0 kts
20120330T053739 ssmi15 156.8 0.0% 3.6 -3.6 n/a   35.0 kts
20120331T052046 ssmi15 45.6 37.0% 6.0 -6.0 n/a   35.0 kts
20120331T162941 ssmi15 23.4 0.0% 2.5 -2.5 n/a   35.0 kts
20120401T050347 ssmi15 112.3 6.8% 0.0 -0.0 n/a   35.0 kts
20120401T161505 ssmi15 179.0 NaN% NaN NaN n/a   35.0 kts
20120402T025639 tmi 123.4 NaN% NaN NaN n/a   35.8 kts
20120402T044644 ssmi15 90.1 4.1% 1.3 -1.3 n/a   36.5 kts
20120402T063640 ssmis17 23.4 20.6% 0.0 -0.0 n/a   37.2 kts
20120402T064007 ssmis16 45.6 13.7% 1.7 -1.7 n/a   37.3 kts
20120402T160050 ssmi15 90.1 26.0% 13.4 -13.4 n/a   43.6 kts
20120402T173822 ssmis16 67.8 38.4% 9.7 -9.7 n/a   45.4 kts
20120402T180338 ssmis17 -919.0 -999.0% -999.0 -909.0 n/a   45.9 kts
20120402T192917 tmi 34.5 NaN% NaN NaN n/a   47.4 kts
20120403T011124 tmi 190.1 4.1% 6.4 -6.4 n/a   49.6 kts
20120403T042834 ssmi15 5.0 0.0% 0.0 -0.0 n/a   46.5 kts
20120403T055843 ssmis16 12.2 0.0% 0.6 -0.6 n/a   45.0 kts
20120403T071013 ssmis18 12.2 0.0% 0.0 -0.0 n/a   43.9 kts
20120403T155332 ssmis17 167.9 NaN% NaN NaN n/a   39.9 kts
20120403T183538 tmi 78.9 0.0% 0.2 -0.2 n/a   39.1 kts
20120403T185915 ssmis18 67.8 0.0% 0.0 -0.0 n/a   38.9 kts
20120403T201329 tmi 23.4 0.0% 5.1 -5.1 n/a   38.1 kts
20120403T215122 tmi 5.0 0.0% 2.7 -2.7 n/a   36.9 kts
20120404T041014 ssmi15 12.2 0.0% 3.0 -3.0 n/a   35.0 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.