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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
20250918 04:38:27 * GMI 85-92GHz 15.6 25.62 -119.66 25.65 -119.69 0.34 0.97 2.20 3.0
20250918 02:18:12 SSMIS-16 85-92GHz 16.5 25.65 -120.03 25.68 -120.05 0.49 1.38 0.40 1.1
20250918 01:35:39 SSMIS-17 85-92GHz 16.8 25.98 -119.89 26.03 -119.94 0.52 1.47 2.40 0.6
20250918 00:17:29 * SSMIS-18 85-92GHz 17.4 25.87 -119.84 25.86 -119.83 0.36 1.03 1.60 2.0
20250917 21:17:39 AMSR2 85-92GHz 18.6 25.48 -119.75 25.47 -119.74 0.54 1.54 0.80 0.5
20250917 14:18:56 SSMIS-17 85-92GHz 21.5 24.68 -120.16 24.74 -120.21 0.56 1.58 5.00 0.6
20250917 02:31:25 SSMIS-16 85-92GHz 26.9 23.62 -118.83 23.67 -118.89 0.31 0.87 4.30 3.4
20250917 01:49:08 SSMIS-17 85-92GHz 27.3 23.60 -118.68 23.72 -118.84 0.34 0.96 1.10 1.5
20250916 14:33:50 SSMIS-17 85-92GHz 35.7 22.63 -117.09 22.64 -117.13 0.36 1.02 0.30 3.2
20250916 11:35:28 SSMIS-18 85-92GHz 42.1 22.21 -116.50 22.23 -116.56 0.25 0.70 1.20 17.0
20250916 11:34:31 SSMIS-18 85-92GHz 40.4 22.25 -116.57 22.28 -116.63 0.24 0.69 1.40 13.7
20250916 09:38:32 AMSR2 85-92GHz 42.0 22.00 -116.28 21.93 -116.14 0.33 0.95 1.30 12.8
20250916 02:02:51 SSMIS-17 85-92GHz 48.3 *** *** *** *** *** *** 1.10 ***
20250915 23:02:48 * SSMIS-18 85-92GHz 50.8 20.98 -114.54 21.09 -114.66 0.41 1.16 0.20 7.1
20250915 18:38:27 * GMI 85-92GHz 55.0 20.79 -114.07 20.71 -113.98 0.22 0.61 0.60 59.4
20250915 11:48:58 SSMIS-18 85-92GHz 49.8 *** *** *** *** *** *** 1.10 ***
20250915 08:56:19 AMSR2 85-92GHz 47.4 19.25 -112.37 19.25 -112.38 0.57 1.62 0.20 5.0
20250915 05:13:27 * GMI 85-92GHz 44.4 19.38 -111.59 19.40 -111.68 0.58 1.63 0.60 2.3
20250914 23:16:22 * SSMIS-18 85-92GHz 40.0 18.46 -111.10 18.49 -111.20 0.49 1.39 1.00 1.7
20250914 23:15:53 SSMIS-18 85-92GHz 41.3 19.37 -110.52 19.40 -110.62 0.58 1.65 0.40 0.2
20250914 20:45:04 AMSR2 85-92GHz 40.0 19.48 -110.14 19.50 -110.17 0.40 1.13 3.70 4.7
20250914 14:03:23 * SSMIS-16 85-92GHz 36.7 18.60 -110.32 18.67 -110.36 0.37 1.05 0.40 15.1
20250913 14:16:44 * SSMIS-16 85-92GHz 35.0 18.54 -107.18 18.54 -107.32 0.41 1.15 3.00 4.3
20250913 13:36:07 SSMIS-17 85-92GHz 35.0 *** *** *** *** *** *** 1.60 ***
20250913 09:08:39 * AMSR2 85-92GHz 35.0 18.30 -106.08 18.30 -106.05 0.41 1.15 0.80 1.6
20250913 05:03:27 GMI 85-92GHz 35.0 18.35 -105.55 18.36 -105.75 0.52 1.46 1.40 2.9
20250913 01:43:14 SSMIS-16 85-92GHz 35.0 17.49 -104.79 17.51 -105.07 0.61 1.71 0.60 0.4
20250913 01:02:55 * SSMIS-17 85-92GHz 35.0 17.67 -104.81 17.65 -104.58 0.54 1.52 0.40 1.4
20250912 10:50:54 SSMIS-18 85-92GHz 31.0 *** *** *** *** *** *** 0.90 ***
20250912 10:50:39 * SSMIS-18 85-92GHz 34.0 16.54 -101.55 16.64 -101.76 0.51 1.45 2.00 1.4
20250912 08:25:58 AMSR2 85-92GHz 32.0 *** *** *** *** *** *** 1.20 ***
20250911 22:15:53 SSMIS-18 85-92GHz 30.0 *** *** *** *** *** *** 1.40 ***
20250911 20:13:15 AMSR2 85-92GHz 30.0 15.55 -98.57 15.62 -98.67 0.64 1.80 0.60 0.1
20250911 18:13:26 * GMI 85-92GHz 30.0 15.46 -98.39 15.45 -98.37 0.43 1.22 0.70 5.8

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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