Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20170721T172144 amsr2_85 44.4 17.2 13.7% 4.9 -4.9 n/a   25.0 kts
20170721T195437 ssmis16_85 44.4 17.2 15.1% 2.3 -2.3 n/a   25.0 kts
20170721T225749 ssmis17_85 33.3 161.8 NaN% NaN NaN n/a   25.0 kts
20170721T225959 ssmis18_85 33.3 22.8 80.8% 0.0 -0.0 n/a   25.0 kts
20170722T070908 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   35.0 kts
20170722T101228 ssmis17_85 44.4 17.2 48.0% 2.2 -2.2 n/a   35.0 kts
20170722T101451 ssmis18_85 33.3 11.7 48.0% 3.4 -3.4 n/a   35.0 kts
20170722T182140 gmi_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20170722T224412 ssmis17_85 55.5 22.8 23.3% 0.0 -0.0 n/a   30.0 kts
20170722T224714 ssmis18_85 77.7 28.4 38.4% 0.0 -0.0 n/a   30.0 kts
20170723T065459 ssmi15_85 66.6 28.4 0.0% 0.5 -0.5 n/a   25.6 kts
20170723T074140 gmi_85 66.6 28.4 0.0% 0.7 -0.7 n/a   24.8 kts
20170723T083746 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   23.7 kts
20170723T192458 ssmi15_85 133.2 61.7 12.3% 1.1 -1.1 n/a   16.9 kts
20170723T210855 ssmis16_85 11.1 2.5 8.2% 0.0 -0.0 n/a   16.2 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).