-- Link to ARCHER Track page --

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 08:50:23   GOES18 IR 26 22.49 -126.96 22.51 -126.99 0.44 1.24 0.70 1
20260827 08:50:23 * GOES18 SWIR 26 22.64 -126.91 22.66 -126.93 0.40 1.14 0.60 ***
20260827 05:50:21   GOES18 IR 28 22.29 -126.63 22.30 -126.65 0.68 1.93 0.80 1
20260827 05:50:21   GOES18 SWIR 28 22.39 -126.52 22.40 -126.54 0.47 1.34 0.60 ***
20260827 02:50:21   GOES18 IR 35 22.23 -126.07 22.24 -126.09 0.35 0.98 0.80 2
20260827 02:50:21 * GOES18 SWIR 35 22.28 -126.01 22.29 -126.03 0.30 0.84 0.70 ***
20260827 02:18:40   SSMIS-17 89-92GHz 35 23.00 -125.66 23.04 -125.75 0.55 1.56 0.80 0
20260826 23:50:21   GOES18 IR 35 22.26 -125.79 22.27 -125.82 0.41 1.17 1.00 1
20260826 23:50:21   GOES18 SWIR 35 22.41 -125.63 22.42 -125.65 0.34 0.95 0.80 ***
20260826 21:24:01   AMSR2 37GHz 35 22.22 -124.90 22.20 -124.83 0.31 0.87 2.20 ***
20260826 21:24:01   AMSR2 89-92GHz 35 22.72 -124.96 22.70 -124.89 0.29 0.81 0.10 2
20260826 20:50:21   GOES18 IR 36 22.25 -125.11 22.26 -125.14 1.60 4.52 0.70 1
20260826 20:50:21 * GOES18 SWIR 36 22.40 -124.89 22.41 -124.92 0.26 0.74 0.40 ***
20260826 15:20:45   GMI 37GHz 39 22.02 -124.10 21.98 -124.05 0.28 0.79 1.50 ***
20260826 15:20:45   GMI 89-92GHz 39 22.32 -124.10 22.28 -124.05 0.58 1.65 3.60 0
20260826 15:03:49   SSMIS-17 89-92GHz 39 *** *** *** *** 0.53 1.50 5.00 0
20260826 14:50:21   GOES18 IR 41 21.47 -124.92 21.49 -124.95 3.36 9.49 0.10 0
20260826 14:50:21   GOES18 SWIR 41 21.72 -124.95 21.74 -124.98 1.17 3.30 0.30 ***
20260826 12:46:29 * SSMIS-18 89-92GHz 42 21.99 -124.00 21.92 -123.88 0.24 0.68 3.80 6
20260826 11:50:21   GOES18 IR 43 21.85 -123.89 21.86 -123.91 3.36 9.49 1.00 1
20260826 11:50:21   GOES18 SWIR 43 21.85 -124.05 21.86 -124.07 1.02 2.90 0.30 ***
20260826 09:41:58   AMSR2 37GHz 44 21.79 -123.77 21.75 -123.69 0.14 0.38 2.70 ***
20260826 09:41:58   AMSR2 89-92GHz 44 21.89 -123.71 21.85 -123.63 0.26 0.72 2.70 5
20260826 08:50:23   GOES18 IR 41 22.29 -121.31 22.30 -121.33 1.04 2.95 0.20 27
20260826 08:50:23   GOES18 SWIR 41 21.54 -123.64 21.55 -123.66 0.93 2.63 0.50 ***
20260826 05:50:21   GOES18 IR 43 22.91 -122.55 22.92 -122.57 3.36 9.49 0.80 7
20260826 05:50:21   GOES18 SWIR 43 21.46 -123.36 21.47 -123.38 3.36 9.49 0.60 ***
20260826 02:50:21   GOES18 IR 43 22.84 -122.47 22.85 -122.49 0.94 2.66 0.10 34
20260826 02:50:21   GOES18 SWIR 43 21.64 -122.41 21.65 -122.43 1.67 4.73 0.70 ***
20260826 02:44:26   SSMIS-16 89-92GHz 45 21.74 -123.00 21.75 -123.04 0.36 1.02 2.40 3
20260826 00:15:17 * SSMIS-18 89-92GHz 46 21.11 -122.23 21.09 -122.20 0.37 1.04 3.20 3
20260825 23:50:21   GOES18 IR 46 20.02 -123.97 20.02 -123.99 2.48 7.01 0.80 6
20260825 23:50:21   GOES18 SWIR 46 20.77 -123.54 20.77 -123.56 3.36 9.49 0.40 ***
20260825 20:50:21   GOES18 IR 56 22.12 -121.21 22.12 -121.23 3.36 9.49 0.60 17
20260825 20:50:21   GOES18 SWIR 56 22.02 -121.15 22.02 -121.17 2.71 7.65 0.70 ***
20260825 17:50:21 * GOES18 IR 58 21.94 -119.71 21.94 -119.73 0.50 1.41 0.10 5
20260825 17:50:21   GOES18 SWIR 58 21.99 -119.76 21.99 -119.78 0.84 2.36 0.20 ***
20260825 14:50:21   GOES18 IR 56 21.51 -119.83 21.52 -119.85 3.36 9.49 0.10 4
20260825 14:50:21   GOES18 SWIR 56 21.49 -120.37 21.49 -120.39 3.36 9.49 0.30 ***
20260825 13:37:23   SSMIS-17 89-92GHz 60 *** *** *** *** 0.34 0.96 2.00 7
20260825 13:01:07   SSMIS-18 89-92GHz 57 *** *** *** *** 0.60 1.70 0.40 1
20260825 11:50:21   GOES18 IR 58 22.09 -119.24 22.10 -119.27 3.36 9.49 0.50 12
20260825 11:50:21   GOES18 SWIR 58 21.74 -119.78 21.75 -119.81 0.77 2.18 0.10 ***
20260825 09:45:37 * AMSR2 37GHz 59 20.51 -120.21 20.46 -120.07 0.19 0.55 1.00 ***
20260825 09:45:37   AMSR2 89-92GHz 59 21.01 -119.84 20.96 -119.70 0.51 1.45 0.70 5
20260825 08:50:22   GOES18 IR 56 21.48 -118.50 21.49 -118.53 3.36 9.49 0.10 7
20260825 08:50:22   GOES18 SWIR 56 19.18 -121.01 19.19 -121.04 0.98 2.76 0.70 ***
20260825 05:50:21   GOES18 IR 58 20.87 -117.48 20.89 -117.52 3.36 9.49 0.20 1
20260825 05:50:21   GOES18 SWIR 58 20.64 -119.05 20.66 -119.09 2.53 7.15 0.60 ***
20260825 02:50:21   GOES18 IR 63 21.08 -118.50 21.11 -118.53 1.75 4.95 0.10 2
20260825 02:50:21   GOES18 SWIR 63 20.73 -118.66 20.76 -118.69 1.47 4.17 0.10 ***
20260825 01:05:13   SSMIS-17 89-92GHz 62 19.38 -118.62 19.23 -118.36 0.29 0.81 2.50 19
20260825 00:29:12   SSMIS-18 89-92GHz 61 20.26 -118.36 20.20 -118.25 0.27 0.78 0.30 21
20260824 23:50:21   GOES18 IR 61 20.87 -117.15 20.89 -117.16 2.62 7.41 1.00 1
20260824 23:50:21   GOES18 SWIR 61 20.75 -117.73 20.76 -117.75 1.62 4.57 0.20 ***
20260824 21:35:06 * AMSR2 37GHz 60 19.31 -118.19 19.24 -118.13 0.12 0.34 0.70 ***
20260824 21:35:06   AMSR2 89-92GHz 60 19.26 -118.14 19.19 -118.08 0.33 0.94 2.10 8
20260824 20:50:21   GOES18 IR 61 19.29 -117.55 19.31 -117.56 2.30 6.50 0.50 40
20260824 20:50:21   GOES18 SWIR 61 19.39 -117.60 19.41 -117.61 0.42 1.19 0.20 ***
20260824 17:50:21   GOES18 IR 58 18.94 -117.26 18.95 -117.28 3.36 9.49 0.10 3
20260824 17:50:21   GOES18 SWIR 58 19.01 -117.21 19.03 -117.23 0.43 1.21 0.10 ***
20260824 15:10:44 * GMI 37GHz 55 18.62 -117.12 18.60 -117.10 0.19 0.53 1.00 ***
20260824 15:10:44   GMI 89-92GHz 55 18.62 -116.91 18.60 -116.89 0.27 0.77 0.90 28
20260824 14:50:21   GOES18 IR 56 18.55 -116.88 18.57 -116.90 3.36 9.49 0.10 11
20260824 14:50:21   GOES18 SWIR 56 18.57 -116.93 18.59 -116.95 2.20 6.23 0.10 ***
20260824 13:52:09   SSMIS-17 89-92GHz 55 18.34 -116.79 18.47 -116.96 0.47 1.32 0.30 4
20260824 11:50:21   GOES18 IR 53 18.28 -116.58 18.29 -116.60 0.31 0.89 0.10 1
20260824 11:50:21   GOES18 SWIR 53 18.28 -116.58 18.29 -116.60 0.77 2.16 0.10 ***
20260824 09:03:27   AMSR2 37GHz 50 17.90 -116.42 17.90 -116.41 0.18 0.51 0.40 ***
20260824 09:03:27   AMSR2 89-92GHz 50 17.80 -116.31 17.80 -116.30 0.26 0.75 0.70 44
20260824 08:50:22   GOES18 IR 48 17.70 -115.60 17.71 -115.63 3.36 9.49 0.20 0
20260824 08:50:22   GOES18 SWIR 48 17.75 -115.55 17.76 -115.57 1.06 3.01 0.10 ***
20260824 05:50:21   GOES18 IR 46 18.63 -114.01 18.65 -114.03 3.36 9.49 0.30 2
20260824 05:50:21   GOES18 SWIR 46 17.26 -115.60 17.28 -115.63 3.36 9.49 0.20 ***
20260824 02:50:21   GOES18 IR 48 19.72 -115.84 19.74 -115.87 1.42 4.01 0.10 28
20260824 02:50:21   GOES18 SWIR 48 18.22 -116.26 18.24 -116.29 0.82 2.32 0.20 ***
20260824 01:18:46 * SSMIS-17 89-92GHz 47 17.35 -115.80 17.18 -115.61 0.33 0.93 2.40 7
20260823 23:50:21   GOES18 IR 46 19.25 -115.29 19.26 -115.30 0.84 2.37 0.80 12
20260823 23:50:21   GOES18 SWIR 46 19.20 -114.95 19.21 -114.96 1.20 3.40 0.50 ***
20260823 20:51:29 * AMSR2 37GHz 45 16.98 -114.97 16.99 -114.98 0.30 0.86 1.00 ***
20260823 20:51:29   AMSR2 89-92GHz 45 17.28 -114.45 17.29 -114.46 0.33 0.94 3.70 17
20260823 20:50:21   GOES18 IR 43 17.79 -114.03 17.79 -114.04 3.36 9.49 0.40 4
20260823 20:50:21   GOES18 SWIR 43 17.79 -114.03 17.79 -114.04 0.35 1.00 0.40 ***
20260823 17:50:21   GOES18 IR 41 17.31 -113.46 17.35 -113.49 1.26 3.57 0.70 16
20260823 17:50:21 * GOES18 SWIR 41 17.28 -113.41 17.33 -113.43 0.45 1.27 0.60 ***
20260823 14:50:21   GOES18 IR 40 13.95 -112.72 14.00 -112.75 3.36 9.49 0.10 24
20260823 14:50:21   GOES18 SWIR 40 15.03 -114.77 15.07 -114.79 3.36 9.49 0.10 ***
20260823 14:07:23   SSMIS-17 89-92GHz 40 *** *** *** *** 0.58 1.63 0.20 1

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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