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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
20250930 02:54:00 Metop-A ASCAT 22.6 *** *** *** *** *** *** *** ***
20250930 00:23:27 GMI 85-92GHz 24.7 *** *** *** *** *** *** 3.00 ***
20250930 00:23:27 GMI 37GHz 24.7 *** *** *** *** *** *** 3.00 ***
20250929 19:01:17 * AMSR2 85-92GHz 29.1 20.64 101.02 20.77 100.70 0.59 1.67 1.00 0.3
20250929 19:01:17 AMSR2 37GHz 29.1 *** *** *** *** *** *** 0.50 ***
20250929 10:58:27 GMI 85-92GHz 41.7 *** *** *** *** *** *** 3.00 ***
20250929 10:58:27 * GMI 37GHz 41.7 20.17 101.60 20.22 101.49 0.52 1.46 3.00 ***
20250929 06:50:48 AMSR2 85-92GHz 48.6 19.68 102.99 19.55 103.26 0.37 1.05 0.20 7.2
20250929 06:50:48 * AMSR2 37GHz 48.6 19.98 103.37 19.85 103.63 0.30 0.86 0.70 ***
20250929 02:24:00 * Metop-C ASCAT 62.0 19.20 106.05 19.21 106.03 0.12 0.35 *** ***
20250928 23:28:26 GMI 85-92GHz 71.8 *** *** *** *** *** *** 3.00 ***
20250928 23:28:26 GMI 37GHz 71.8 *** *** *** *** *** *** 3.00 ***
20250928 18:18:56 AMSR2 85-92GHz 80.0 *** *** *** *** *** *** 0.40 ***
20250928 18:18:56 AMSR2 37GHz 80.0 *** *** *** *** *** *** 0.40 ***
20250928 13:54:00 * Metop-C ASCAT 73.2 17.67 106.87 17.71 106.79 0.24 0.68 *** ***
20250928 13:03:00 Metop-A ASCAT 71.7 *** *** *** *** *** *** *** ***
20250928 06:06:52 AMSR2 85-92GHz 70.0 17.01 107.97 16.95 108.09 0.19 0.53 1.50 59.8
20250928 06:06:52 * AMSR2 37GHz 70.0 17.16 108.08 17.10 108.20 0.09 0.27 0.50 ***
20250928 02:45:00 * Metop-C ASCAT 70.0 16.62 108.74 16.60 108.80 0.23 0.64 *** ***
20250927 20:52:35 SSMIS-18 85-92GHz 67.4 *** *** *** *** *** *** 0.40 ***
20250927 14:12:00 * Metop-C ASCAT 71.3 15.55 111.26 15.55 111.19 0.17 0.49 *** ***
20250927 10:48:27 * GMI 85-92GHz 75.0 15.18 112.20 15.21 112.00 0.11 0.32 1.30 100.0
20250927 10:48:27 GMI 37GHz 75.0 15.68 111.94 15.71 111.74 0.15 0.43 2.40 ***
20250927 08:18:20 SSMIS-18 85-92GHz 75.0 15.23 113.34 15.26 113.28 0.23 0.64 0.20 11.5
20250927 05:23:21 AMSR2 85-92GHz 75.0 15.10 113.06 15.11 113.04 0.22 0.62 2.10 7.9
20250927 05:23:21 * AMSR2 37GHz 75.0 15.15 113.58 15.16 113.56 0.13 0.36 0.70 ***
20250927 01:24:00 Metop-C ASCAT 75.0 *** *** *** *** *** *** *** ***
20250926 23:18:27 GMI 85-92GHz 74.4 *** *** *** *** *** *** 1.80 ***
20250926 23:18:27 * GMI 37GHz 74.4 14.56 115.44 14.58 115.38 0.12 0.35 0.60 ***
20250926 01:45:00 * Metop-C ASCAT 60.0 12.44 122.02 12.49 121.64 0.26 0.73 *** ***
20250925 19:40:09 * SSMIS-18 85-92GHz 56.4 12.29 124.04 12.31 123.74 0.25 0.70 0.70 58.9
20250925 13:12:00 * Metop-C ASCAT 54.5 12.02 126.35 12.04 126.10 0.14 0.40 *** ***
20250925 10:43:27 GMI 85-92GHz 55.0 11.40 126.64 11.47 126.47 0.39 1.10 0.60 44.8
20250925 10:43:27 GMI 37GHz 55.0 12.25 126.94 12.32 126.77 0.30 0.85 1.80 ***
20250925 07:03:35 * SSMIS-18 85-92GHz 54.6 11.44 127.53 11.63 127.22 0.30 0.85 1.60 10.6
20250924 23:08:27 * GMI 85-92GHz 55.0 11.18 128.32 11.20 128.27 0.43 1.21 0.60 18.0
20250924 23:08:27 GMI 37GHz 55.0 *** *** *** *** *** *** 1.20 ***
20250924 19:54:49 * SSMIS-18 85-92GHz 55.0 10.90 129.52 10.96 129.43 0.27 0.76 0.40 64.4
20250924 17:06:29 AMSR2 85-92GHz 54.3 10.80 130.19 10.82 130.13 0.37 1.06 1.30 16.1
20250924 17:06:29 * AMSR2 37GHz 54.3 10.75 130.24 10.77 130.18 0.14 0.41 0.60 ***
20250924 12:45:00 Metop-A ASCAT 50.0 *** *** *** *** *** *** *** ***
20250924 12:42:00 Metop-A ASCAT 50.0 *** *** *** *** *** *** *** ***
20250924 09:20:29 * SSMIS-16 85-92GHz 47.8 9.98 131.50 9.92 131.61 0.33 0.93 0.70 27.1
20250924 07:17:18 * SSMIS-18 85-92GHz 46.1 10.59 131.66 10.68 131.50 0.45 1.26 1.70 5.5
20250923 23:57:00 * Metop-A ASCAT 39.9 10.00 133.06 10.00 133.12 0.26 0.73 *** ***
20250923 22:12:07 * SSMIS-16 85-92GHz 37.0 9.90 133.17 9.90 133.00 0.30 0.84 1.50 26.8
20250923 21:26:28 SSMIS-17 85-92GHz 35.7 9.75 133.05 9.75 133.15 0.43 1.21 1.00 7.6
20250923 16:23:44 * AMSR2 85-92GHz 28.7 9.59 134.28 9.55 134.15 0.48 1.35 0.60 5.8
20250923 16:23:44 AMSR2 37GHz 28.7 9.54 134.38 9.50 134.25 0.56 1.58 0.30 ***
20250923 12:12:00 * Metop-C ASCAT 25.0 9.65 134.17 9.70 134.25 0.36 1.01 *** ***
20250923 11:24:00 * Metop-A ASCAT 25.0 9.60 134.84 9.59 134.82 0.20 0.58 *** ***

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: Summary table, ARCHER Track table, ARCHER Track Image Archive, Intensity Estimation, ARCHER-ERC page, F-Decks

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