Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 24.  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)
 05/26/2023   14:52:24   ( -70.17, 132.88) 05/26/2023   14:53:35  ( -70.17, 133.01)    5.17                71
 05/26/2023   15:43:07   (  69.99, -59.55) 05/26/2023   15:43:03  (  70.01, -59.57)    2.82                 4
 05/26/2023   16:33:47   ( -69.80, 108.05) 05/26/2023   16:32:34  ( -69.85, 107.83)    9.89                73
 05/29/2023   07:09:17   ( -70.09,-111.23) 05/29/2023   07:10:05  ( -70.07,-111.25)    1.70                48
 05/29/2023   08:00:01   (  69.97,  56.26) 05/29/2023   07:59:32  (  69.96,  56.24)    0.55                29
 05/31/2023   22:35:45   (  70.94,-164.16) 05/31/2023   22:36:52  (  70.82,-161.90)   83.54                67
 05/31/2023   23:26:12   ( -70.06,   4.56) 05/31/2023   23:26:34  ( -70.05,   4.61)    2.17                22
 06/01/2023   00:16:56   (  69.95, 172.05) 06/01/2023   00:16:01  (  69.94, 172.10)    2.02                55
 06/03/2023   14:52:24   (  70.09, -47.03) 06/03/2023   14:53:33  (  70.11, -47.05)    2.33                69
 06/03/2023   15:43:06   ( -70.00, 120.43) 06/03/2023   15:43:03  ( -70.01, 120.44)    1.03                 3
 06/03/2023   16:33:45   (  69.62, -71.70) 06/03/2023   16:32:33  (  69.73, -72.31)   26.48                72
 06/06/2023   07:09:19   (  70.09,  68.74) 06/06/2023   07:10:01  (  70.09,  68.81)    2.73                42
 06/06/2023   08:00:00   ( -69.94,-123.71) 06/06/2023   07:59:32  ( -69.94,-123.77)    2.38                28