Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 8.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 11/10/2023   15:42:50   ( -69.98, 120.34) 11/10/2023   15:43:52  ( -69.98, 120.36)    1.17                62
 11/10/2023   16:33:34   (  69.87, -72.19) 11/10/2023   16:33:19  (  69.88, -72.14)    1.92                15
 11/10/2023   17:24:07   ( -69.29,  95.97) 11/10/2023   17:22:56  ( -69.38,  94.82)   46.10                71
 11/13/2023   07:59:47   ( -69.92,-123.81) 11/13/2023   08:00:18  ( -69.92,-123.82)    0.93                31
 11/13/2023   08:50:31   (  69.81,  43.66) 11/13/2023   08:49:45  (  69.81,  43.66)    0.32                46
 11/15/2023   23:26:02   (  69.97,-175.45) 11/15/2023   23:27:13  (  69.97,-175.49)    1.55                71
 11/16/2023   00:16:43   ( -69.87,  -7.98) 11/16/2023   00:16:42  ( -69.86,  -8.01)    1.46                 1
 11/16/2023   01:07:23   (  69.55, 159.80) 11/16/2023   01:06:11  (  69.63, 159.33)   20.54                72
 11/18/2023   15:42:58   (  69.95, -59.65) 11/18/2023   15:43:35  (  69.96, -59.60)    2.64                37
 11/18/2023   16:33:40   ( -69.84, 107.83) 11/18/2023   16:33:05  ( -69.85, 107.89)    2.93                35
 11/21/2023   07:09:16   ( -70.30,-111.74) 11/21/2023   07:10:28  ( -70.18,-111.01)   30.08                72
 11/21/2023   07:59:54   (  69.89,  56.20) 11/21/2023   07:59:58  (  69.90,  56.23)    1.77                 4
 11/21/2023   08:50:36   ( -69.77,-136.32) 11/21/2023   08:49:28  ( -69.79,-136.28)    2.40                68