Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 22.  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)
 05/23/2023   22:35:45   ( -71.05,  15.69) 05/23/2023   22:36:51  ( -70.95,  18.29)   94.76                66
 05/23/2023   23:26:12   (  70.03,-175.38) 05/23/2023   23:26:33  (  70.03,-175.44)    2.42                21
 05/24/2023   00:16:54   ( -69.95,  -7.94) 05/24/2023   00:16:02  ( -69.97,  -7.88)    2.86                52
 05/26/2023   14:52:24   ( -70.18, 132.86) 05/26/2023   14:53:35  ( -70.15, 132.98)    5.15                71
 05/26/2023   15:43:07   (  70.00, -59.56) 05/26/2023   15:43:03  (  69.99, -59.60)    1.68                 4
 05/26/2023   16:33:47   ( -69.81, 108.04) 05/26/2023   16:32:34  ( -69.83, 107.81)    9.22                73
 05/29/2023   07:09:18   ( -70.10,-111.25) 05/29/2023   07:10:05  ( -70.10,-111.21)    1.31                47
 05/29/2023   08:00:02   (  69.98,  56.24) 05/29/2023   07:59:32  (  69.99,  56.27)    1.63                30
 05/31/2023   22:35:44   (  70.91,-164.09) 05/31/2023   22:36:51  (  70.82,-161.88)   81.10                67
 05/31/2023   23:26:12   ( -70.08,   4.55) 05/31/2023   23:26:33  ( -70.06,   4.62)    3.47                21
 06/01/2023   00:16:55   (  69.91, 172.11) 06/01/2023   00:16:01  (  69.89, 172.03)    3.39                54
 06/03/2023   14:52:24   (  70.11, -47.05) 06/03/2023   14:53:32  (  70.10, -47.06)    1.27                68
 06/03/2023   15:43:06   ( -70.01, 120.41) 06/03/2023   15:43:02  ( -70.00, 120.42)    1.98                 4
 06/03/2023   16:33:45   (  69.64, -71.72) 06/03/2023   16:32:33  (  69.66, -72.40)   26.17                72