Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20170222T045902 ssmis18 123.4 NaN% NaN NaN n/a   36.9 kts
20170222T055838 ssmis17 212.4 3.0% 5.7 -5.7 n/a   36.5 kts
20170222T170142 ssmis18 201.2 0.0% 2.4 -2.4 n/a   35.0 kts
20170222T170541 ssmis17 67.8 0.0% 0.2 -0.2 n/a   35.0 kts
20170223T022036 ssmis16 23.4 0.0% 0.0 -0.0 n/a   35.0 kts
20170223T052947 ssmis18 212.4 0.0% 0.0 -0.0 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.

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).