Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20170415T095953 ssmis16_85 55.5 22.8 9.6% 8.5 -8.5 n/a   40.0 kts
20170415T120222 ssmis18_85 144.3 67.3 8.2% 0.0 -0.0 n/a   40.0 kts
20170415T134139 gmi_85 111.0 50.6 20.6% 0.0 -0.0 n/a   41.4 kts
20170415T203213 ssmi15_85 99.9 45.0 38.4% 15.9 -15.9 n/a   45.0 kts
20170416T001830 ssmis17_85 77.7 33.9 9.6% 9.4 -9.4 n/a   45.0 kts
20170416T003749 ssmis18_85 77.7 33.9 12.3% 7.9 -7.9 n/a   45.0 kts
20170416T094739 ssmis16_85 166.5 78.4 19.4% 2.6 -2.6 n/a   45.0 kts
20170416T113034 ssmis17_85 166.5 106.2 NaN% NaN NaN n/a   45.0 kts
20170416T115050 ssmis18_85 133.2 61.7 5.6% 0.1 -0.1 n/a   45.0 kts
20170416T201454 ssmi15_85 333.0 161.8 NaN% NaN NaN n/a   35.0 kts
20170416T222112 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   33.5 kts
20170417T000357 ssmis17_85 155.4 72.8 0.0% 1.0 -1.0 n/a   31.6 kts
20170417T002415 ssmis18_85 22.2 6.1 0.0% 0.3 -0.3 n/a   31.2 kts
20170417T093538 ssmis16_85 22.2 6.1 0.0% 0.4 -0.4 n/a   25.0 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).