Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20170221T154450 ssmis16_85 290.2 NaN% NaN NaN n/a   40.0 kts
20170221T173908 ssmis17_85 223.5 NaN% NaN NaN n/a   40.0 kts
20170222T054456 ssmis18_85 167.9 NaN% NaN NaN n/a   37.6 kts
20170222T061059 ssmis17_85 312.4 NaN% NaN NaN n/a   37.4 kts
20170222T121845 amsr2_85 201.2 3.1% 4.6 -4.6 n/a   35.0 kts
20170222T170142 ssmis18_85 323.5 NaN% NaN NaN n/a   35.0 kts
20170222T172657 ssmis17_85 323.5 NaN% NaN NaN n/a   35.0 kts
20170223T002550 amsr2_85 323.5 NaN% NaN NaN n/a   35.0 kts
20170223T022036 ssmis16_85 290.2 NaN% NaN NaN n/a   35.0 kts
20170223T052947 ssmis18_85 312.4 NaN% NaN NaN 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).