Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 12 26.  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   ( -69.94, 120.29) 12/28/2023   15:43:57  ( -69.97, 120.30)    2.79                44
 12/28/2023   16:33:57   (  69.83, -72.22) 12/28/2023   16:33:25  (  69.81, -72.29)    3.31                32
 12/31/2023   07:09:37   (  70.63,  67.67) 12/31/2023   07:10:46  (  70.52,  69.34)   63.21                69
 12/31/2023   08:00:07   ( -69.91,-123.89) 12/31/2023   08:00:25  ( -69.91,-123.89)    0.33                18
 12/31/2023   08:50:51   (  69.80,  43.60) 12/31/2023   08:49:52  (  69.80,  43.60)    0.60                59
 01/02/2024   23:26:19   (  69.98,-175.53) 01/02/2024   23:27:22  (  69.98,-175.54)    0.22                63
 01/03/2024   00:17:01   ( -69.89,  -8.08) 01/03/2024   00:16:52  ( -69.88,  -8.05)    1.83                 9
 01/03/2024   01:07:36   (  69.30, 160.09) 01/03/2024   01:06:26  (  69.38, 158.91)   47.21                70
 01/05/2024   15:43:12   (  69.98, -59.75) 01/05/2024   15:43:47  (  69.97, -59.67)    3.08                35
 01/05/2024   16:33:53   ( -69.83, 107.79) 01/05/2024   16:33:18  ( -69.81, 107.74)    3.21                35
 01/08/2024   07:09:30   ( -70.51,-112.11) 01/08/2024   07:10:40  ( -70.36,-110.86)   49.52                70
 01/08/2024   08:00:05   (  69.93,  56.11) 01/08/2024   08:00:13  (  69.91,  56.15)    2.49                 8
 01/08/2024   08:50:46   ( -69.78,-136.36) 01/08/2024   08:49:43  ( -69.81,-136.36)    3.26                63