Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 1.  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)
 06/03/2023   14:52:25   (  70.11, -47.06) 06/03/2023   14:53:34  (  70.11, -47.05)    0.52                69
 06/03/2023   15:43:05   ( -69.98, 120.46) 06/03/2023   15:43:03  ( -70.00, 120.42)    3.04                 2
 06/03/2023   16:33:45   (  69.64, -71.73) 06/03/2023   16:32:33  (  69.73, -72.31)   24.36                72
 06/06/2023   07:09:18   (  70.05,  68.80) 06/06/2023   07:10:02  (  70.06,  68.76)    1.51                44
 06/06/2023   08:00:00   ( -69.97,-123.75) 06/06/2023   07:59:32  ( -69.95,-123.76)    1.73                28
 06/08/2023   22:35:44   ( -70.95,  15.82) 06/08/2023   22:36:51  ( -70.80,  18.11)   84.80                67
 06/08/2023   23:26:13   (  70.05,-175.43) 06/08/2023   23:26:30  (  70.04,-175.37)    2.59                17
 06/09/2023   00:16:54   ( -69.91,  -7.90) 06/09/2023   00:16:00  ( -69.93,  -7.89)    2.80                54
 06/11/2023   14:52:23   ( -70.11, 132.93) 06/11/2023   14:53:31  ( -70.11, 132.97)    1.57                68
 06/11/2023   15:43:07   (  70.00, -59.59) 06/11/2023   15:42:58  (  70.00, -59.54)    2.07                 9
 06/11/2023   16:33:44   ( -69.64, 108.26) 06/11/2023   16:32:32  ( -69.67, 107.64)   24.16                72
 06/14/2023   07:09:17   ( -70.07,-111.23) 06/14/2023   07:09:59  ( -70.05,-111.22)    1.93                42
 06/14/2023   08:00:00   (  69.96,  56.24) 06/14/2023   07:59:25  (  69.94,  56.27)    3.06                35