2026_18W

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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

20260822 02:30:00 *	HIMAWARI9	IR	35	19.35	109.72	19.35	109.72	1.91	5.41	0.60	6
20260822 02:30:00	HIMAWARI9	SWIR	35	21.30	106.66	21.30	106.66	3.36	9.49	0.50	***

20260822 01:00:45	GMI	37GHz	35	***	***	***	***	0.43	1.21	1.20	***
20260822 01:00:45 *	GMI	89-92GHz	35	***	***	***	***	0.36	1.02	2.70	14
20260821 23:30:00 *	HIMAWARI9	IR	35	19.54	110.07	19.55	110.07	0.48	1.36	0.40	11
20260821 23:30:00	HIMAWARI9	SWIR	35	19.39	109.81	19.40	109.80	0.49	1.38	0.80	***
20260821 23:03:47	SSMIS-17	89-92GHz	35	***	***	***	***	0.49	1.38	3.60	1

20260821 20:46:00 *	SSMIS-18	89-92GHz	35	***	***	***	***	0.34	0.96	0.50	1
20260821 20:00:00 *	HIMAWARI9	IR	35	19.16	109.34	19.18	109.32	0.44	1.25	0.30	57
20260821 20:00:00	HIMAWARI9	SWIR	35	21.36	108.53	21.38	108.52	1.01	2.85	0.10	***

20260821 17:00:00	HIMAWARI9	IR	35	19.11	109.63	19.15	109.63	3.36	9.49	0.20	4
20260821 17:00:00 *	HIMAWARI9	SWIR	35	19.19	109.79	19.22	109.79	0.84	2.39	1.00	***

20260821 14:00:00	HIMAWARI9	IR	35	19.41	110.24	19.44	110.24	0.86	2.44	0.60	12
20260821 14:00:00 *	HIMAWARI9	SWIR	35	19.41	110.24	19.44	110.24	0.46	1.31	0.60	***

20260821 11:35:44 *	GMI	37GHz	30	***	***	***	***	0.16	0.46	1.80	***
20260821 11:35:44	GMI	89-92GHz	30	***	***	***	***	0.29	0.83	0.80	2
20260821 11:30:00	HIMAWARI9	IR	30	19.86	110.51	19.88	110.53	2.22	6.28	0.50	4
20260821 11:30:00	HIMAWARI9	SWIR	30	19.29	110.06	19.30	110.07	3.36	9.49	0.20	***
20260821 10:32:08	SSMIS-17	89-92GHz	30	20.24	109.67	20.29	109.72	0.40	1.13	2.20	1

20260821 08:14:37 *	SSMIS-18	89-92GHz	30	***	***	***	***	0.24	0.67	1.00	2
20260821 08:00:00	HIMAWARI9	IR	30	18.79	109.11	18.82	109.14	3.36	9.49	0.10	40
20260821 08:00:00	HIMAWARI9	SWIR	30	18.94	109.62	18.97	109.65	1.23	3.48	0.20	***

20260821 05:30:00 *	HIMAWARI9	IR	30	18.56	109.45	18.60	109.45	3.36	9.49	0.20	13
20260821 05:30:00 *	HIMAWARI9	SWIR	30	19.46	109.51	19.50	109.51	3.36	9.49	0.10	***

20260821 02:30:00	HIMAWARI9	IR	30	18.25	108.23	18.28	108.23	2.78	7.86	0.50	31
20260821 02:30:00 *	HIMAWARI9	SWIR	30	20.10	107.21	20.13	107.21	0.34	0.96	0.30	***
20260821 01:45:44 *	GMI	37GHz	25	***	***	***	***	0.28	0.78	0.40	***
20260821 01:45:44	GMI	89-92GHz	25	***	***	***	***	0.35	1.00	2.20	8

20260820 23:30:00	HIMAWARI9	IR	25	19.11	106.68	19.12	106.69	2.26	6.39	0.50	8
20260820 23:30:00	HIMAWARI9	SWIR	25	19.96	107.85	19.97	107.87	3.36	9.49	0.20	***
20260820 23:18:17 *	SSMIS-17	89-92GHz	25	20.26	108.92	20.27	108.94	0.26	0.74	1.00	8

20260820 21:00:51 *	SSMIS-18	89-92GHz	25	***	***	***	***	0.26	0.72	0.50	1
20260820 20:30:00	HIMAWARI9	IR	25	18.90	110.10	18.91	110.12	3.36	9.49	0.10	2
20260820 20:30:00	HIMAWARI9	SWIR	25	19.98	107.97	19.98	107.99	3.36	9.49	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.

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