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
		20251001 10:33:52 AMSR2 85-92GHz 20.0 22.57 -125.69 22.64 -125.80 0.52 1.47 0.10 0.7
		20251001 02:41:04 SSMIS-16 85-92GHz 20.0 22.25 -125.00 22.26 -125.03 0.43 1.22 0.40 1.4 20251001 01:52:08 SSMIS-17 85-92GHz 20.0 22.31 -124.68 22.36 -124.76 0.34 0.95 0.10 2.1
		20251001 00:36:06 * SSMIS-18 85-92GHz 20.0 22.30 -124.97 22.28 -124.93 0.29 0.81 1.50 2.6
		20250930 09:51:10 * AMSR2 85-92GHz 23.4 21.48 -124.42 21.46 -124.41 0.39 1.09 1.60 1.2
		20250929 21:41:22 AMSR2 85-92GHz 25.0 21.32 -124.51 21.31 -124.52 0.50 1.41 3.80 0.8
		20250929 15:03:27 GMI 85-92GHz 26.2 21.26 -124.67 21.26 -124.67 0.57 1.62 0.30 0.3
		20250929 01:38:25 * GMI 85-92GHz 32.4 20.25 -124.98 20.35 -124.93 0.22 0.63 0.30 4.7
		20250928 15:43:26 GMI 85-92GHz 38.8 *** *** *** *** *** *** 5.00 ***
		20250928 10:04:07 * AMSR2 85-92GHz 46.6 19.07 -125.36 18.98 -125.37 0.25 0.70 0.20 23.0
		20250928 02:23:26 GMI 85-92GHz 59.0 18.51 -125.10 18.55 -125.07 0.36 1.01 1.40 5.0
		20250927 21:52:47 * AMSR2 85-92GHz 66.8 18.35 -124.99 18.29 -124.93 0.24 0.68 0.30 5.8
		20250926 15:33:26 GMI 85-92GHz 80.0 16.71 -121.84 16.70 -121.76 0.11 0.31 0.90 100.0
		20250926 02:13:26 * GMI 85-92GHz 80.0 15.72 -119.06 15.72 -119.23 0.14 0.40 2.10 76.1
		20250925 09:33:59 AMSR2 85-92GHz 80.0 16.32 -115.55 16.27 -115.37 0.14 0.39 0.50 78.6
		20250924 21:20:55 AMSR2 85-92GHz 82.2 15.65 -112.70 15.65 -112.65 0.16 0.45 1.20 9.6
		20250924 15:23:26 GMI 85-92GHz 87.2 15.30 -111.29 15.30 -111.25 0.15 0.41 1.00 6.5
		20250924 11:25:04 SSMIS-18 85-92GHz 88.7 15.60 -110.45 15.60 -110.54 0.17 0.49 1.50 0.4 20250924 11:25:02 * SSMIS-18 85-92GHz 90.0 15.55 -110.52 15.55 -110.61 0.17 0.49 1.40 1.0
		20250923 22:49:55 * SSMIS-18 85-92GHz 83.1 15.06 -108.64 15.04 -108.84 0.13 0.37 0.30 95.8
		20250923 20:37:44 * AMSR2 85-92GHz 79.4 15.19 -108.28 15.18 -108.34 0.10 0.27 0.30 100.0
		20250923 13:41:26 SSMIS-16 85-92GHz 75.0 15.50 -107.08 15.39 -107.30 0.12 0.35 0.30 100.0
		20250923 12:55:59 SSMIS-17 85-92GHz 75.0 15.50 -107.01 15.52 -106.85 0.11 0.31 0.40 100.0 20250923 11:38:40 * SSMIS-18 85-92GHz 74.1 15.50 -106.74 15.50 -106.80 0.10 0.29 0.40 100.0 20250923 11:38:29 SSMIS-18 85-92GHz 64.4 *** *** *** *** *** *** 0.40 ***
		20250923 02:48:27 GMI 85-92GHz 57.3 *** *** *** *** *** *** 0.40 ***
		20250923 00:21:27 * SSMIS-17 85-92GHz 55.0 16.00 -104.42 16.01 -104.35 0.20 0.57 0.30 70.6 20250922 23:04:02 * SSMIS-18 85-92GHz 54.2 15.91 -104.62 15.88 -104.81 0.21 0.59 0.40 68.1
		20250922 15:13:27 GMI 85-92GHz 47.7 15.89 -103.10 15.87 -103.06 0.24 0.67 1.20 65.3 20250922 13:54:56 * SSMIS-16 85-92GHz 46.6 16.02 -103.05 16.14 -103.22 0.24 0.67 1.00 55.1
		20250922 13:09:53 SSMIS-17 85-92GHz 45.0 15.79 -102.49 15.69 -102.28 0.54 1.52 0.40 4.5
		20250922 00:35:05 * SSMIS-17 85-92GHz 35.0 14.64 -99.61 14.63 -99.53 0.37 1.05 0.20 2.2

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