Tropical Depression 21L


ARCHER-V2 Auto-positioning Information
Advanced Dvorak Technique (ADT)
Version 9.1
 

                                         -------FORECAST-----   ----ARCHER---- 50% cert  95% cert Eyewall   Conf Alpha  Eye
     Date/Time(UTC)     Source   Sensor    Lat     Lon   Vmax     Lat     Lon    radius    radius  radius  Score Score  Prob    .
   20231024 01:10:20   GOES-16     SWIR   11.83  -83.79  25.0    12.88  -83.00    1.81      0.05     N/A    0.35  2.63   0.0 PNG
   20231024 01:40:20   GOES-16     SWIR   11.85  -83.83  25.0    12.78  -83.11    2.12      0.05     N/A    0.30  2.23   0.0 PNG
   20231024 02:10:20   GOES-16     SWIR   11.87  -83.87  25.0    12.82  -83.15    1.42      0.05     N/A    0.43  3.35   0.0 PNG
   20231024 02:40:20   GOES-16     SWIR   11.89  -83.91  25.0    12.92  -83.11    1.46      0.10     N/A    0.42  3.25   0.0 PNG
   20231024 03:10:20   GOES-16     SWIR   12.40  -83.39  25.0    12.80  -83.29    1.26      0.05     N/A    0.48  3.76   0.0 PNG
   20231024 03:40:20   GOES-16     SWIR   12.44  -83.42  25.0    12.56  -83.11    2.07      0.05     N/A    0.31  2.29   0.0 PNG
   20231024 04:10:20   GOES-16     SWIR   12.47  -83.44  25.0    12.87  -83.34    1.88      0.05     N/A    0.33  2.53   0.0 PNG
   20231024 04:40:20   GOES-16       IR   12.50  -83.46  25.0    12.88  -83.05    9.49      0.05    3.36    0.18  0.50  11.0 PNG
   20231024 05:10:20   GOES-16     SWIR   12.54  -83.49  25.0    12.54  -83.49    7.87      0.50     N/A    0.11  0.60   0.0 PNG
   20231024 05:40:20   GOES-16     SWIR   12.58  -83.52  25.0    13.03  -83.60    4.71      0.05     N/A    0.16  1.01   0.0 PNG
   20231024 06:10:20   GOES-16       IR   12.61  -83.55  25.0    12.66  -83.55    9.49      0.50    3.36    0.25  0.50  13.7 PNG
   20231024 06:40:20   GOES-16     SWIR   12.65  -83.59  25.0    12.70  -83.51    5.42      0.05     N/A    0.14  0.88   0.0 PNG
   20231024 07:10:20   GOES-16     SWIR   12.69  -83.63  25.0    12.99  -83.50    2.99      0.05     N/A    0.23  1.59   0.0 PNG
   20231024 07:40:20   GOES-16       IR   12.73  -83.67  25.0    13.95  -82.06    3.39      0.50    1.20    0.35  1.40  10.4 PNG
   20231024 08:10:20   GOES-16       IR   12.77  -83.72  25.0    13.42  -83.92    4.96      0.05    1.75    0.31  0.96  40.5 PNG
   20231024 08:40:20   GOES-16       IR   12.81  -83.77  25.0    13.53  -84.18    9.49      0.05    3.36    0.22  0.50  20.3 PNG
   20231024 09:10:20   GOES-16       IR   13.10  -84.00  25.0    13.50  -84.26    5.75      0.05    2.03    0.29  0.82  45.2 PNG
   20231024 09:40:20     AMSR2    89GHz   13.11  -84.03  25.0    12.86  -84.03    1.48      0.60    0.52    0.18  3.21   1.3 PNG
   20231024 10:10:20     AMSR2    89GHz   13.11  -84.03  25.0    12.88  -84.09    1.48      0.60    0.52    0.18  3.03   1.3 PNG
   20231024 10:40:20  SSMISF18    89GHz   13.14  -84.11  25.0    13.09  -84.21    1.28      1.80    0.45    0.33  3.72   0.9 PNG
   20231024 11:10:20  SSMISF18    89GHz   13.14  -84.11  25.0    13.10  -84.27    1.28      1.80    0.45    0.33  3.54   0.9 PNG
   20231024 11:40:20  SSMISF18    89GHz   13.14  -84.11  25.0    13.11  -84.31    1.28      1.80    0.45    0.33  3.48   0.9 PNG
   20231024 12:10:20  SSMISF18    89GHz   13.14  -84.11  25.0    13.12  -84.35    1.28      1.80    0.45    0.33  3.40   0.9 PNG
   20231024 12:40:20  SSMISF18    89GHz   13.14  -84.11  25.0    13.12  -84.39    1.28      1.80    0.45    0.33  3.33   0.9 PNG
 
 
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 30-minute 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:
  - Track Plot
  - Summary table
  - Intensity Estimation