Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 7.  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   23:26:06   ( -70.74,   3.39) 11/07/2023   23:27:14  ( -70.65,   5.45)   76.33                68
 11/08/2023   00:16:36   (  69.89, 172.03) 11/08/2023   00:16:53  (  69.89, 171.99)    1.63                17
 11/08/2023   01:07:18   ( -69.79, -20.51) 11/08/2023   01:06:23  ( -69.78, -20.53)    1.60                55
 11/10/2023   15:42:50   ( -69.98, 120.34) 11/10/2023   15:43:52  ( -69.98, 120.36)    0.64                62
 11/10/2023   16:33:34   (  69.86, -72.18) 11/10/2023   16:33:19  (  69.87, -72.15)    1.25                15
 11/10/2023   17:24:07   ( -69.29,  95.97) 11/10/2023   17:22:56  ( -69.37,  94.81)   46.59                71
 11/13/2023   07:59:47   ( -69.92,-123.81) 11/13/2023   08:00:18  ( -69.90,-123.86)    2.94                31
 11/13/2023   08:50:31   (  69.81,  43.66) 11/13/2023   08:49:45  (  69.78,  43.63)    3.19                46
 11/15/2023   23:26:01   (  69.98,-175.46) 11/15/2023   23:27:11  (  69.97,-175.49)    1.63                70
 11/16/2023   00:16:43   ( -69.88,  -7.99) 11/16/2023   00:16:41  ( -69.86,  -8.00)    1.69                 2
 11/16/2023   01:07:23   (  69.56, 159.79) 11/16/2023   01:06:10  (  69.63, 159.33)   19.57                73
 11/18/2023   15:42:57   (  69.91, -59.59) 11/18/2023   15:43:34  (  69.93, -59.64)    2.33                37
 11/18/2023   16:33:39   ( -69.80, 107.88) 11/18/2023   16:33:04  ( -69.82, 107.85)    2.37                35