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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
20260727 02:30:00   HIMAWARI9 IR 27 26.99 111.05 27.07 111.03 3.36 9.49 0.10 1
20260727 02:30:00 * HIMAWARI9 SWIR 27 25.37 114.66 25.44 114.64 0.86 2.44 0.10 ***
20260727 00:08:44   SSMIS-16 89-92GHz 29 26.67 112.18 26.65 112.19 0.45 1.28 3.00 1
20260726 23:30:00   HIMAWARI9 IR 30 25.72 111.12 25.80 111.10 3.36 9.49 0.90 0
20260726 23:00:00   HIMAWARI9 SWIR 30 27.45 111.76 27.61 111.73 2.71 7.65 0.10 ***
20260726 22:31:36   SSMIS-17 89-92GHz 31 *** *** *** *** 0.44 1.23 2.20 2
20260726 20:30:00   HIMAWARI9 IR 34 24.94 111.31 25.02 111.29 3.36 9.49 1.00 0
20260726 20:30:00   HIMAWARI9 SWIR 34 26.14 111.31 26.22 111.29 2.09 5.90 0.70 ***
20260726 18:49:55   GMI 37GHz 36 *** *** *** *** 0.48 1.36 0.20 ***
20260726 18:49:55   GMI 89-92GHz 36 *** *** *** *** 0.35 0.99 0.10 1
20260726 17:00:00   HIMAWARI9 IR 38 25.21 113.48 25.37 113.44 3.36 9.49 0.10 0
20260726 17:00:00 * HIMAWARI9 SWIR 38 25.41 111.35 25.57 111.32 0.70 1.98 1.00 ***
20260726 14:30:00   HIMAWARI9 IR 41 26.05 114.31 26.13 114.30 3.01 8.50 0.40 9
20260726 14:30:00   HIMAWARI9 SWIR 41 26.05 113.27 26.13 113.25 2.60 7.34 0.20 ***
20260726 11:30:00   HIMAWARI9 IR 46 25.04 113.50 25.09 113.47 3.36 9.49 0.10 1
20260726 11:30:00 * HIMAWARI9 SWIR 46 25.64 112.63 25.69 112.59 0.70 1.99 0.60 ***
20260726 10:01:03   SSMIS-17 89-92GHz 51 *** *** *** *** 0.41 1.16 0.80 2
20260726 08:20:00   HIMAWARI9 IR 56 23.91 113.17 23.98 113.12 3.36 9.49 0.50 1
20260726 08:20:00   HIMAWARI9 SWIR 56 23.63 113.99 23.71 113.94 3.36 9.49 0.30 ***
20260726 05:30:00 * HIMAWARI9 IR 66 24.01 112.24 24.07 112.21 0.69 1.96 0.90 49
20260726 05:30:00   HIMAWARI9 SWIR 66 24.06 113.85 24.12 113.82 1.27 3.60 0.50 ***
20260726 02:30:00 * HIMAWARI9 IR 75 23.82 112.29 23.87 112.26 0.40 1.12 0.30 36
20260726 02:30:00   HIMAWARI9 SWIR 75 23.25 114.22 23.30 114.19 2.02 5.71 0.10 ***
20260725 23:30:00   HIMAWARI9 IR 78 22.72 114.56 22.76 114.51 0.81 2.30 0.20 5
20260725 23:30:00   HIMAWARI9 SWIR 78 22.89 114.47 22.93 114.42 3.36 9.49 0.30 ***
20260725 20:26:56 * SSMIS-18 89-92GHz 85 22.79 114.74 22.84 114.69 0.11 0.32 0.30 98
20260725 20:10:00   HIMAWARI9 IR 85 22.65 114.82 22.72 114.74 0.14 0.39 0.10 99
20260725 20:10:00   HIMAWARI9 SWIR 85 22.35 115.41 22.42 115.33 0.56 1.58 0.20 ***
20260725 19:34:54   GMI 37GHz 77 *** *** *** *** 0.15 0.44 1.00 ***
20260725 19:34:54   GMI 89-92GHz 77 *** *** *** *** 0.16 0.46 0.40 50
20260725 18:42:41   AMSR2 37GHz 85 *** *** *** *** 0.17 0.49 5.00 ***
20260725 17:10:00   HIMAWARI9 IR 78 22.14 115.29 22.23 115.18 0.15 0.42 0.10 100
20260725 17:10:00   HIMAWARI9 SWIR 78 22.32 115.34 22.40 115.23 0.34 0.97 0.50 ***
20260725 14:00:00   HIMAWARI9 IR 80 21.85 115.87 21.95 115.73 0.21 0.59 0.70 9
20260725 14:00:00   HIMAWARI9 SWIR 80 22.07 115.60 22.17 115.46 1.12 3.16 0.20 ***
20260725 11:30:00   HIMAWARI9 IR 77 21.62 116.18 21.66 116.12 0.21 0.59 0.10 99
20260725 11:30:00   HIMAWARI9 SWIR 77 21.72 116.18 21.76 116.12 0.34 0.97 0.30 ***
20260725 10:15:41   SSMIS-17 89-92GHz 76 21.53 116.23 21.42 116.38 0.10 0.27 0.40 100
20260725 08:10:00   HIMAWARI9 IR 75 21.52 116.64 21.59 116.54 0.21 0.60 0.50 49
20260725 08:10:00   HIMAWARI9 SWIR 75 21.47 116.43 21.54 116.33 0.57 1.62 0.10 ***
20260725 07:55:58 * SSMIS-18 89-92GHz 75 21.34 116.39 21.43 116.26 0.10 0.27 0.60 100
20260725 05:30:00   HIMAWARI9 SWIR 75 20.90 116.53 20.94 116.39 0.27 0.77 0.90 ***
20260725 05:20:00   HIMAWARI9 IR 75 21.37 116.99 21.43 116.80 0.45 1.28 0.60 11
20260725 04:54:47   AMSR2 37GHz 74 *** *** *** *** 0.24 0.69 5.00 ***
20260725 04:54:47   AMSR2 89-92GHz 74 *** *** *** *** 0.25 0.70 5.00 0
20260725 02:30:00   HIMAWARI9 IR 70 21.08 117.67 21.12 117.53 0.42 1.20 0.10 58
20260725 02:30:00   HIMAWARI9 SWIR 70 21.00 117.35 21.04 117.20 0.25 0.70 0.20 ***
20260724 23:10:00   HIMAWARI9 SWIR 71 20.65 118.07 20.76 117.93 0.18 0.51 0.10 ***
20260724 23:00:00   HIMAWARI9 IR 71 20.70 118.28 20.83 118.11 0.22 0.63 0.50 10
20260724 20:41:48   SSMIS-18 89-92GHz 65 20.47 118.65 20.51 118.60 0.22 0.63 0.80 28
20260724 20:10:00   HIMAWARI9 IR 65 20.10 118.58 20.21 118.45 1.20 3.40 0.40 0
20260724 20:10:00   HIMAWARI9 SWIR 65 20.15 119.09 20.26 118.95 0.65 1.84 0.20 ***
20260724 18:00:06   AMSR2 37GHz 65 20.05 119.30 20.05 119.30 0.10 0.28 0.30 ***
20260724 18:00:06   AMSR2 89-92GHz 65 20.05 119.30 20.05 119.30 0.13 0.36 0.30 87
20260724 17:30:00   HIMAWARI9 IR 64 20.03 118.60 20.05 118.51 1.63 4.62 1.00 10
20260724 17:00:00   HIMAWARI9 SWIR 64 20.03 118.71 20.08 118.52 3.01 8.50 0.60 ***
20260724 14:30:00   HIMAWARI9 IR 60 19.50 120.06 19.53 119.97 1.05 2.98 0.30 1
20260724 14:30:00 * HIMAWARI9 SWIR 60 19.55 120.03 19.58 119.94 0.68 1.91 0.10 ***

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

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