Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20110402T135637 tmi 156.8 NaN% NaN NaN n/a   35.0 kts
20110402T172250 amsre NaN 65.8% 0.7 -0.7 n/a   35.0 kts
20110402T234225 ssmis18 NaN 8.2% 0.8 -0.8 n/a   35.0 kts
20110403T053614 amsre 12.2 50.7% 10.5 -10.5 n/a   35.0 kts
20110403T053630 amsre NaN 23.3% 0.0 -0.0 n/a   35.0 kts
20110403T094556 ssmis16 NaN 11.0% 1.2 -1.2 n/a   35.0 kts
20110403T225029 tmi NaN 0.0% 2.7 -2.7 n/a   25.8 kts
20110403T232352 ssmis18 NaN 0.0% 0.2 -0.2 n/a   25.4 kts
20110404T100649 ssmis17 NaN 0.0% 1.6 -1.6 n/a   20.2 kts
20110404T120621 ssmis18 NaN 0.0% 0.2 -0.2 n/a   20.0 kts
20110404T134216 tmi NaN 0.0% 3.4 -3.4 n/a   20.0 kts
20110404T171132 amsre 212.4 NaN% NaN NaN n/a   20.0 kts
20110404T211846 ssmis17 NaN 0.0% 2.7 -2.7 n/a   20.0 kts
20110404T215353 tmi -919.0 -999.0% -999.0 -909.0 n/a   20.0 kts
20110404T223608 ssmis16 NaN 0.0% 1.2 -1.2 n/a   20.0 kts
20110404T231916 ssmis18 45.6 NaN% NaN NaN 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.