Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 3.  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)
 11/05/2023   07:59:39   (  69.98,  56.14) 11/05/2023   08:00:25  (  69.97,  56.21)    2.96                46
 11/05/2023   08:50:20   ( -69.83,-136.32) 11/05/2023   08:49:56  ( -69.81,-136.38)    3.36                24
 11/07/2023   23:26:07   ( -70.77,   3.33) 11/07/2023   23:27:15  ( -70.65,   5.44)   78.53                68
 11/08/2023   00:16:36   (  69.87, 172.05) 11/08/2023   00:16:54  (  69.89, 171.98)    3.27                18
 11/08/2023   01:07:18   ( -69.77, -20.48) 11/08/2023   01:06:24  ( -69.78, -20.54)    2.27                54
 11/10/2023   15:42:51   ( -69.99, 120.32) 11/10/2023   15:43:54  ( -69.99, 120.36)    1.57                63
 11/10/2023   16:33:35   (  69.88, -72.21) 11/10/2023   16:33:21  (  69.87, -72.15)    2.39                14
 11/10/2023   17:24:09   ( -69.36,  95.88) 11/10/2023   17:22:58  ( -69.38,  94.81)   41.76                71
 11/13/2023   07:59:49   ( -69.95,-123.87) 11/13/2023   08:00:21  ( -69.94,-123.81)    2.69                32
 11/13/2023   08:50:32   (  69.80,  43.67) 11/13/2023   08:49:48  (  69.83,  43.68)    3.20                44
 11/15/2023   23:26:05   (  70.09,-175.64) 11/15/2023   23:27:15  (  70.08,-175.36)   10.97                70
 11/16/2023   00:16:45   ( -69.88,  -8.00) 11/16/2023   00:16:47  ( -69.87,  -8.02)    1.67                 2
 11/16/2023   01:07:27   (  69.67, 159.62) 11/16/2023   01:06:15  (  69.69, 159.38)    9.28                72