Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 6.  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)
 11/07/2023   23:26:07   ( -70.77,   3.33) 11/07/2023   23:27:14  ( -70.66,   5.46)   79.07                67
 11/08/2023   00:16:37   (  69.92, 171.98) 11/08/2023   00:16:53  (  69.90, 172.00)    2.76                16
 11/08/2023   01:07:18   ( -69.77, -20.48) 11/08/2023   01:06:23  ( -69.79, -20.52)    2.14                55
 11/10/2023   15:42:49   ( -69.96, 120.37) 11/10/2023   15:43:51  ( -69.97, 120.35)    1.72                62
 11/10/2023   16:33:33   (  69.85, -72.15) 11/10/2023   16:33:18  (  69.86, -72.16)    1.34                15
 11/10/2023   17:24:06   ( -69.27,  96.00) 11/10/2023   17:22:56  ( -69.31,  94.73)   50.33                70
 11/13/2023   07:59:46   ( -69.90,-123.78) 11/13/2023   08:00:16  ( -69.92,-123.82)    3.28                30
 11/13/2023   08:50:30   (  69.79,  43.69) 11/13/2023   08:49:43  (  69.80,  43.66)    2.10                47
 11/15/2023   23:26:01   (  69.96,-175.43) 11/15/2023   23:27:10  (  69.97,-175.48)    2.24                69
 11/16/2023   00:16:43   ( -69.85,  -7.95) 11/16/2023   00:16:40  ( -69.86,  -8.00)    1.98                 3
 11/16/2023   01:07:22   (  69.48, 159.90) 11/16/2023   01:06:10  (  69.57, 159.26)   26.96                72
 11/18/2023   15:42:58   (  69.94, -59.63) 11/18/2023   15:43:32  (  69.95, -59.60)    1.68                34
 11/18/2023   16:33:40   ( -69.83, 107.85) 11/18/2023   16:33:02  ( -69.84, 107.89)    2.18                38