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
		20260831 08:30:00   HIMAWARI9 IR 31 38.14 165.30 38.27 165.34 3.36 9.49 0.70 0 20260831 08:30:00 * HIMAWARI9 SWIR 31 38.26 165.43 38.40 165.47 0.62 1.75 0.60 ***
		20260831 05:30:00   HIMAWARI9 IR 32 37.21 163.75 37.34 163.79 3.36 9.49 1.00 0 20260831 05:30:00   HIMAWARI9 SWIR 32 37.36 164.38 37.49 164.42 3.36 9.49 0.80 *** 20260831 04:35:44   GMI 37GHz 33 *** *** *** *** 0.35 1.00 2.30 *** 20260831 04:35:44   GMI 89-92GHz 33 37.82 166.20 38.20 166.32 0.30 0.83 2.10 4
		20260831 04:13:42   SSMIS-18 89-92GHz 33 37.33 165.49 37.00 165.39 0.34 0.95 2.70 2 20260831 02:30:00   HIMAWARI9 IR 33 36.71 162.88 36.84 162.92 0.48 1.35 0.90 5 20260831 02:30:00   HIMAWARI9 SWIR 33 36.46 162.88 36.59 162.92 0.38 1.08 0.30 *** 20260831 01:59:29   AMSR2 37GHz 34 *** *** *** *** 0.25 0.70 2.30 *** 20260831 01:59:29   AMSR2 89-92GHz 34 36.84 165.58 37.11 165.66 0.34 0.96 3.40 2
		20260830 23:30:00   HIMAWARI9 IR 35 36.40 162.86 36.48 162.83 0.87 2.46 0.50 1 20260830 23:30:00   HIMAWARI9 SWIR 35 36.02 162.86 36.11 162.83 0.68 1.92 0.10 ***
		20260830 20:30:00   HIMAWARI9 IR 35 35.83 163.01 35.92 162.98 0.82 2.33 0.30 1 20260830 20:30:00   HIMAWARI9 SWIR 35 35.73 163.01 35.82 162.98 0.61 1.74 0.30 ***
		20260830 19:08:02   SSMIS-17 89-92GHz 35 35.24 165.23 35.04 165.29 0.57 1.61 2.00 0 20260830 17:30:00   HIMAWARI9 IR 35 34.12 167.82 34.21 167.79 0.48 1.35 0.90 7 20260830 17:30:00 * HIMAWARI9 SWIR 35 34.34 167.94 34.43 167.92 0.31 0.89 0.40 ***
		20260830 14:56:48   AMSR2 37GHz 35 *** *** *** *** 0.48 1.36 1.10 *** 20260830 14:56:48   AMSR2 89-92GHz 35 34.49 165.56 34.50 165.56 0.43 1.22 1.10 2 20260830 14:30:00   HIMAWARI9 IR 35 33.61 167.97 33.70 167.96 3.36 9.49 0.40 1 20260830 14:30:00   HIMAWARI9 SWIR 35 33.99 168.15 34.07 168.14 0.97 2.73 0.60 ***
		20260830 11:30:00   HIMAWARI9 IR 43 32.80 168.03 32.86 167.92 3.36 9.49 0.60 1 20260830 11:30:00   HIMAWARI9 SWIR 43 33.27 168.76 33.34 168.64 0.78 2.20 0.10 ***
		20260830 08:30:00   HIMAWARI9 IR 45 32.13 168.13 32.19 168.01 3.36 9.49 0.80 9 20260830 08:30:00   HIMAWARI9 SWIR 45 32.10 168.19 32.17 168.07 0.47 1.32 0.70 ***
		20260830 06:57:48   SSMIS-16 89-92GHz 55 *** *** *** *** 0.43 1.23 1.20 5 20260830 05:30:00   HIMAWARI9 IR 57 30.96 167.01 31.13 166.96 1.36 3.83 1.00 5 20260830 05:30:00   HIMAWARI9 SWIR 57 30.99 167.24 31.15 167.19 0.52 1.46 0.10 *** 20260830 05:20:45 * GMI 37GHz 57 32.69 167.26 32.91 167.19 0.30 0.85 0.50 *** 20260830 05:20:45   GMI 89-92GHz 57 32.89 167.32 33.11 167.25 0.43 1.23 0.40 7
		20260830 04:26:44   SSMIS-18 89-92GHz 58 32.78 167.58 32.29 167.73 0.39 1.10 0.20 15 20260830 02:30:00   HIMAWARI9 IR 60 31.36 168.12 31.53 168.07 3.36 9.49 0.10 11 20260830 02:30:00   HIMAWARI9 SWIR 60 31.31 167.88 31.48 167.83 0.93 2.63 0.30 ***
		20260829 23:30:00   HIMAWARI9 IR 62 28.18 167.00 28.48 166.89 0.55 1.56 0.90 2 20260829 23:30:00   HIMAWARI9 SWIR 62 28.18 167.00 28.48 166.89 0.72 2.04 0.20 ***
		20260829 20:20:00   HIMAWARI9 IR 65 27.33 167.16 27.73 167.02 0.67 1.90 0.90 3 20260829 20:20:00   HIMAWARI9 SWIR 65 27.45 167.08 27.85 166.93 0.59 1.67 0.10 *** 20260829 19:30:45   GMI 37GHz 69 *** *** *** *** 0.30 0.86 1.30 *** 20260829 19:30:45   GMI 89-92GHz 69 28.91 168.85 29.80 168.53 0.17 0.48 0.70 63
		20260829 17:30:00   HIMAWARI9 IR 72 25.56 169.66 25.76 169.71 1.30 3.67 0.20 2 20260829 17:30:00   HIMAWARI9 SWIR 72 27.09 169.83 27.29 169.88 1.51 4.26 0.30 ***
		20260829 14:20:00   HIMAWARI9 IR 75 25.78 168.82 26.05 168.89 0.92 2.61 0.10 0 20260829 14:20:00   HIMAWARI9 SWIR 75 26.83 170.41 27.10 170.48 0.33 0.93 0.20 *** 20260829 14:16:15   AMSR2 37GHz 75 24.80 167.15 25.09 167.23 0.18 0.50 1.00 *** 20260829 14:16:15 * AMSR2 89-92GHz 75 26.60 168.82 26.89 168.90 0.16 0.45 0.40 91
		20260829 11:30:00   HIMAWARI9 IR 75 25.00 168.71 25.11 168.75 0.59 1.66 0.10 6 20260829 11:30:00   HIMAWARI9 SWIR 75 25.10 168.66 25.21 168.69 0.70 1.98 0.30 ***
		20260829 08:30:00   HIMAWARI9 IR 75 24.50 168.81 24.62 168.84 0.46 1.30 0.10 2 20260829 08:30:00 * HIMAWARI9 SWIR 75 24.52 168.62 24.64 168.65 0.15 0.42 0.10 ***
		20260829 06:55:27   SSMIS-17 89-92GHz 69 24.14 168.33 23.92 168.27 0.19 0.53 0.50 76 20260829 05:30:00   HIMAWARI9 IR 67 23.43 167.99 23.58 168.02 0.49 1.38 0.50 7 20260829 05:30:00   HIMAWARI9 SWIR 67 23.63 168.21 23.78 168.24 0.31 0.88 0.30 *** 20260829 04:38:28   SSMIS-18 89-92GHz 66 23.47 168.18 23.86 168.27 0.22 0.61 0.50 65
		20260829 02:30:00   HIMAWARI9 IR 65 22.64 167.37 22.79 167.40 0.40 1.14 0.70 7 20260829 02:30:00   HIMAWARI9 SWIR 65 22.87 167.97 23.01 168.00 0.42 1.18 0.30 *** 20260829 02:07:57   AMSR2 37GHz 65 22.87 167.94 23.12 168.00 0.13 0.38 0.20 *** 20260829 02:07:57   AMSR2 89-92GHz 65 22.82 167.89 23.07 167.95 0.20 0.57 0.60 82
		20260828 23:30:00   HIMAWARI9 IR 65 21.86 167.40 22.00 167.47 0.37 1.05 0.50 1 20260828 23:30:00 * HIMAWARI9 SWIR 65 22.01 167.56 22.15 167.63 0.35 0.99 0.10 ***
		20260828 20:30:00   HIMAWARI9 IR 65 21.43 167.09 21.57 167.16 1.19 3.35 0.10 5 20260828 20:30:00 * HIMAWARI9 SWIR 65 21.25 167.12 21.39 167.19 0.40 1.13 0.10 ***
		20260828 17:30:00   HIMAWARI9 IR 65 20.25 166.68 20.33 166.73 1.97 5.57 0.70 0 20260828 17:30:00   HIMAWARI9 SWIR 65 20.20 167.11 20.28 167.15 2.70 7.64 0.10 *** 20260828 17:24:46   SSMIS-18 89-92GHz 67 *** *** *** *** 0.15 0.43 0.10 4
		20260828 15:13:15   AMSR2 37GHz 65 *** *** *** *** 0.41 1.15 5.00 *** 20260828 14:00:00   HIMAWARI9 IR 65 19.72 166.30 19.89 166.38 1.67 4.71 0.10 3 20260828 14:00:00   HIMAWARI9 SWIR 65 20.10 166.22 20.27 166.30 0.58 1.63 0.60 ***
		20260828 11:30:00   HIMAWARI9 IR 64 20.77 165.71 20.82 165.78 1.38 3.90 0.20 48 20260828 11:30:00   HIMAWARI9 SWIR 64 20.72 166.17 20.77 166.23 3.13 8.84 1.00 ***
		20260828 08:00:00   HIMAWARI9 IR 62 20.94 165.49 21.04 165.62 2.63 7.43 0.80 1 20260828 08:00:00   HIMAWARI9 SWIR 62 18.64 164.93 18.74 165.06 0.73 2.07 0.10 ***
		20260828 07:21:39   SSMIS-16 89-92GHz 61 *** *** *** *** 0.48 1.36 5.00 0 20260828 05:30:00   HIMAWARI9 IR 59 18.71 164.98 18.76 165.04 3.36 9.49 0.10 1 20260828 05:30:00   HIMAWARI9 SWIR 59 18.71 164.84 18.76 164.91 0.45 1.28 0.30 *** 20260828 04:51:41   SSMIS-18 89-92GHz 59 18.52 165.63 18.63 165.78 0.32 0.89 0.50 14
		20260828 02:30:00   HIMAWARI9 IR 57 18.65 164.82 18.70 164.89 0.43 1.21 0.40 7 20260828 02:30:00 * HIMAWARI9 SWIR 57 18.35 164.98 18.40 165.04 0.37 1.05 0.30 ***
		20260827 23:30:00   HIMAWARI9 IR 54 18.64 164.11 18.69 164.18 3.36 9.49 0.20 3 20260827 23:30:00   HIMAWARI9 SWIR 54 18.12 164.19 18.17 164.25 0.64 1.81 0.30 ***
		20260827 20:30:00   HIMAWARI9 IR 51 17.63 164.19 17.68 164.26 3.36 9.49 0.10 1 20260827 20:30:00   HIMAWARI9 SWIR 51 17.98 164.35 18.03 164.42 0.72 2.04 0.40 ***
		20260827 19:15:44   GMI 37GHz 49 *** *** *** *** 0.36 1.02 4.80 *** 20260827 19:15:44   GMI 89-92GHz 49 *** *** *** *** 0.30 0.84 1.00 39 20260827 17:39:05   SSMIS-18 89-92GHz 47 17.61 164.04 17.64 164.09 0.19 0.53 0.50 73 20260827 17:10:00   HIMAWARI9 SWIR 47 18.29 164.05 18.38 164.16 1.38 3.90 0.80 *** 20260827 17:00:00   HIMAWARI9 IR 47 19.52 163.47 19.62 163.60 3.36 9.49 0.60 11
		20260827 14:31:04 * AMSR2 37GHz 45 17.20 163.78 17.25 163.84 0.14 0.38 0.30 *** 20260827 14:31:04   AMSR2 89-92GHz 45 17.50 163.46 17.55 163.53 0.18 0.51 0.10 95 20260827 14:30:00   HIMAWARI9 IR 45 19.07 164.09 19.12 164.15 0.62 1.74 1.00 47 20260827 14:30:00   HIMAWARI9 SWIR 45 19.05 164.09 19.10 164.15 0.73 2.06 1.00 ***
		20260827 11:30:00   HIMAWARI9 IR 36 17.86 162.76 17.89 162.84 2.97 8.40 0.30 0 20260827 11:30:00   HIMAWARI9 SWIR 36 17.51 162.52 17.54 162.61 1.20 3.39 0.20 ***
		20260827 08:00:00   HIMAWARI9 IR 35 18.84 162.67 18.90 162.83 3.36 9.49 0.20 11 20260827 08:00:00   HIMAWARI9 SWIR 35 17.56 162.74 17.63 162.91 0.59 1.66 0.20 ***
		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