Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 12 27.  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)
 12/28/2023   15:43:13   ( -69.93, 120.32) 12/28/2023   15:43:58  ( -69.93, 120.24)    2.82                45
 12/28/2023   16:33:57   (  69.81, -72.20) 12/28/2023   16:33:25  (  69.82, -72.26)    3.05                32
 12/31/2023   07:09:38   (  70.67,  67.61) 12/31/2023   07:10:46  (  70.54,  69.37)   66.44                68
 12/31/2023   08:00:08   ( -69.95,-123.94) 12/31/2023   08:00:25  ( -69.93,-123.87)    3.12                17
 12/31/2023   08:50:51   (  69.83,  43.55) 12/31/2023   08:49:51  (  69.82,  43.62)    3.10                60
 01/02/2024   23:26:19   (  70.02,-175.58) 01/02/2024   23:27:21  (  70.01,-175.51)    2.97                62
 01/03/2024   00:17:00   ( -69.87,  -8.05) 01/03/2024   00:16:51  ( -69.90,  -8.02)    3.18                 9
 01/03/2024   01:07:36   (  69.33, 160.05) 01/03/2024   01:06:25  (  69.40, 158.94)   44.11                71
 01/05/2024   15:43:12   (  69.95, -59.71) 01/05/2024   15:43:48  (  69.94, -59.71)    1.88                36
 01/05/2024   16:33:53   ( -69.81, 107.82) 01/05/2024   16:33:18  ( -69.83, 107.77)    3.24                35
 01/08/2024   07:09:30   ( -70.48,-112.07) 01/08/2024   07:10:40  ( -70.39,-110.82)   47.83                70
 01/08/2024   08:00:05   (  69.90,  56.15) 01/08/2024   08:00:14  (  69.89,  56.11)    1.98                 9
 01/08/2024   08:50:47   ( -69.81,-136.40) 01/08/2024   08:49:44  ( -69.79,-136.40)    2.53                63