Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20131122T093449 ssmis17 12.2 84.9% 2.2 -2.2 n/a   39.3 kts
20131122T151325 tmi 23.4 NaN% NaN NaN n/a   44.3 kts
20131122T234954 ssmis18 145.7 NaN% NaN NaN n/a   45.0 kts
20131123T092136 ssmis17 67.8 0.0% 3.9 -3.9 n/a   44.3 kts
20131123T141853 tmi 45.6 65.8% 4.6 -4.6 n/a   41.9 kts
20131124T080415 ssmis16 5.0 NaN% NaN NaN n/a   35.0 kts
20131124T083240 ssmis17 212.4 15.1% 1.6 -1.6 n/a   35.0 kts
20131124T132432 tmi 12.2 31.5% 0.0 -0.0 n/a   35.0 kts
20131125T073136 ssmis16 12.2 0.0% 0.0 -0.0 n/a   35.0 kts
20131127T103859 tmi 5.0 65.8% 0.0 -0.0 n/a   33.3 kts
20131127T230536 ssmis18 23.4 13.7% 3.2 -3.2 n/a   29.7 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.

Error messages in intensity scores: -920 is used when the hottest pixel in the eye is <200K, to prevent false positives; -909 is a failure to process (bad input data).