Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 4.  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   (  69.97,  56.15) 11/05/2023   08:00:25  (  69.98,  56.22)    3.23                46
 11/05/2023   08:50:20   ( -69.82,-136.31) 11/05/2023   08:49:56  ( -69.82,-136.37)    2.52                24
 11/07/2023   23:26:07   ( -70.76,   3.35) 11/07/2023   23:27:15  ( -70.65,   5.44)   78.03                68
 11/08/2023   00:16:37   (  69.92, 171.99) 11/08/2023   00:16:54  (  69.89, 171.98)    3.11                17
 11/08/2023   01:07:18   ( -69.76, -20.47) 11/08/2023   01:06:24  ( -69.78, -20.54)    3.01                54
 11/10/2023   15:42:51   ( -69.98, 120.33) 11/10/2023   15:43:54  ( -69.98, 120.35)    1.02                63
 11/10/2023   16:33:35   (  69.88, -72.20) 11/10/2023   16:33:21  (  69.87, -72.16)    1.79                14
 11/10/2023   17:24:09   ( -69.35,  95.89) 11/10/2023   17:22:58  ( -69.38,  94.81)   42.41                71
 11/13/2023   07:59:47   ( -69.90,-123.79) 11/13/2023   08:00:20  ( -69.92,-123.83)    3.29                33
 11/13/2023   08:50:31   (  69.79,  43.68) 11/13/2023   08:49:47  (  69.81,  43.65)    1.89                44
 11/15/2023   23:26:04   (  70.04,-175.56) 11/15/2023   23:27:15  (  70.04,-175.40)    6.12                71
 11/16/2023   00:16:45   ( -69.88,  -8.00) 11/16/2023   00:16:46  ( -69.89,  -7.99)    0.99                 1
 11/16/2023   01:07:27   (  69.67, 159.62) 11/16/2023   01:06:14  (  69.71, 159.42)    9.04                73