Geo IR	85-92GHz	Date/Time_(UTC) Source Sensor Vmax(kts) ARCHER Lat Lon Geo-ref Lat Lon 50% cert. rad. 95% cert. rad. Eye diam (deg) % cert. of eye
		20260827 06:31:23   SSMIS-17 89-92GHz 30 *** *** *** *** 0.29 0.83 5.00 0 20260827 05:20:00   HIMAWARI9 IR 30 18.41 162.17 18.41 162.27 3.36 9.49 0.20 9 20260827 05:20:00   HIMAWARI9 SWIR 30 17.91 162.02 17.91 162.12 3.36 9.49 0.10 *** 20260827 05:05:09   SSMIS-18 89-92GHz 30 *** *** *** *** 0.44 1.24 2.10 7
		20260827 02:30:00   HIMAWARI9 IR 30 18.76 161.55 18.76 161.63 0.73 2.07 0.30 5 20260827 02:30:00   HIMAWARI9 SWIR 30 18.73 162.26 18.73 162.33 2.35 6.63 0.90 *** 20260827 02:18:59   AMSR2 37GHz 30 16.88 163.04 16.88 163.14 0.30 0.84 1.60 *** 20260827 02:18:59   AMSR2 89-92GHz 30 16.53 161.94 16.53 162.04 0.57 1.62 0.80 1
		20260826 23:30:00   HIMAWARI9 IR 30 18.93 162.87 18.88 162.91 0.30 0.85 0.60 19 20260826 23:30:00   HIMAWARI9 SWIR 30 18.93 162.87 18.88 162.91 0.39 1.11 1.00 ***
		20260826 20:30:00   HIMAWARI9 IR 30 18.73 162.29 18.69 162.32 3.36 9.49 0.80 7 20260826 20:30:00   HIMAWARI9 SWIR 30 18.58 162.24 18.54 162.27 1.22 3.44 0.90 *** 20260826 20:00:45   GMI 37GHz 30 16.95 161.21 16.87 161.27 0.25 0.69 0.50 *** 20260826 20:00:45   GMI 89-92GHz 30 17.25 161.10 17.17 161.17 0.43 1.20 4.00 3
		20260826 17:53:13   SSMIS-18 89-92GHz 30 17.39 161.50 17.39 161.50 0.55 1.55 1.00 1 20260826 17:00:00   HIMAWARI9 IR 30 17.33 161.57 17.33 161.57 3.36 9.49 0.40 35 20260826 17:00:00   HIMAWARI9 SWIR 30 17.23 162.10 17.23 162.10 3.36 9.49 0.50 ***
		20260826 15:26:27 * AMSR2 37GHz 30 17.31 161.03 17.31 161.03 0.38 1.07 0.10 *** 20260826 15:26:27   AMSR2 89-92GHz 30 17.46 161.24 17.46 161.24 0.53 1.51 0.50 2 20260826 14:30:00   HIMAWARI9 IR 30 17.31 161.04 17.31 161.04 3.36 9.49 0.30 11 20260826 14:30:00   HIMAWARI9 SWIR 30 17.73 162.13 17.73 162.13 3.36 9.49 0.40 ***
		20260826 11:30:00   HIMAWARI9 IR 26 18.45 159.73 18.45 159.70 3.36 9.49 0.10 41 20260826 11:30:00   HIMAWARI9 SWIR 26 17.83 163.47 17.83 163.45 3.36 9.49 0.20 ***
		20260826 08:10:00   HIMAWARI9 IR 25 17.68 161.20 17.68 161.16 3.36 9.49 0.20 1 20260826 08:10:00   HIMAWARI9 SWIR 25 17.53 161.18 17.53 161.13 0.49 1.37 0.10 *** 20260826 07:48:53 * SSMIS-16 89-92GHz 25 17.91 160.53 17.91 160.47 0.47 1.33 1.40 2

Key:

Date/Time: UTC time. If this observation is used in the track it is marked with a "*". If it is used for its own 3-hr window, it is put in bold.

Source/sensor: Satellite source of the analyzed image.

Vmax: Maximum winds listed in the forecast center analysis/forecast, *not* ARCHER.

ARCHER lat/lon: Coordinates of the ARCHER algorithm, valid at the time of the observation. If no center fix could be found, then it is "***".

Geo ref lat/lon: Coordinates of the ARCHER algorithm, valid at the time of the *nearest geo image*.

50% cert. rad.: Radius of the circle (in degrees) that defines the area in which the ARCHER center of rotation is 50% certain. The lower the number, the more certain the position.

95% cert. rad.: Radius of the circle (in degrees) that defines the area in which the ARCHER center of rotation is 95% certain.

Eye diam (deg): ARCHER-resolved eye diameter (in degrees). Green: robust, yellow: less certain, red: not robust.

% cert. of eye: Percent certainty that an eye exists in this image, determined by ARCHER. Currently only available for IR and 85-92 GHz imagery.

Links to related versions: ARCHER Track page