Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 14.  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)
 03/15/2023   14:53:14   (  70.16, -47.16) 03/15/2023   14:54:12  (  70.17, -47.09)    3.42                58
 03/15/2023   15:43:55   ( -70.01, 120.37) 03/15/2023   15:43:43  ( -70.00, 120.30)    2.99                12
 03/15/2023   16:34:28   (  69.31, -71.30) 03/15/2023   16:33:19  (  69.40, -72.88)   62.68                69
 03/18/2023   07:10:06   (  70.10,  68.69) 03/18/2023   07:10:40  (  70.13,  68.72)    3.19                34
 03/18/2023   08:00:48   ( -70.01,-123.85) 03/18/2023   08:00:10  ( -70.02,-123.80)    2.00                38
 03/20/2023   22:36:24   ( -70.70,  16.22) 03/20/2023   22:37:33  ( -70.58,  17.62)   53.48                69
 03/20/2023   23:26:58   (  70.07,-175.48) 03/20/2023   23:27:07  (  70.09,-175.45)    2.93                 9
 03/21/2023   00:17:40   ( -69.97,  -8.02) 03/21/2023   00:16:37  ( -69.98,  -7.97)    2.20                63
 03/23/2023   14:53:06   ( -70.15, 132.86) 03/23/2023   14:54:06  ( -70.17, 132.91)    3.12                60
 03/23/2023   15:43:50   (  70.05, -59.68) 03/23/2023   15:43:33  (  70.06, -59.60)    3.04                17
 03/23/2023   16:34:22   ( -69.42, 108.56) 03/23/2023   16:33:12  ( -69.46, 107.20)   53.34                70
 03/26/2023   07:09:56   ( -70.09,-111.28) 03/26/2023   07:10:31  ( -70.10,-111.30)    1.20                35
 03/26/2023   08:00:40   (  69.99,  56.19) 03/26/2023   07:59:58  (  69.98,  56.18)    1.43                42