Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 31.  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)
 05/31/2023   22:35:46   (  70.97,-164.20) 05/31/2023   22:36:52  (  70.86,-161.83)   86.99                66
 05/31/2023   23:26:12   ( -70.05,   4.59) 05/31/2023   23:26:35  ( -70.03,   4.58)    1.47                23
 06/01/2023   00:16:56   (  69.92, 172.09) 06/01/2023   00:16:02  (  69.93, 172.08)    1.33                54
 06/03/2023   14:52:24   (  70.11, -47.06) 06/03/2023   14:53:33  (  70.12, -47.04)    0.86                69
 06/03/2023   15:43:06   ( -70.03, 120.39) 06/03/2023   15:43:03  ( -70.01, 120.43)    2.87                 3
 06/03/2023   16:33:45   (  69.64, -71.73) 06/03/2023   16:32:33  (  69.74, -72.30)   24.51                72
 06/06/2023   07:09:18   (  70.05,  68.80) 06/06/2023   07:10:02  (  70.07,  68.77)    2.08                44
 06/06/2023   08:00:00   ( -69.96,-123.75) 06/06/2023   07:59:32  ( -69.96,-123.75)    0.48                28
 06/08/2023   22:35:44   ( -70.95,  15.83) 06/08/2023   22:36:51  ( -70.81,  18.12)   84.79                67
 06/08/2023   23:26:13   (  70.05,-175.43) 06/08/2023   23:26:30  (  70.05,-175.36)    2.61                17
 06/09/2023   00:16:54   ( -69.90,  -7.89) 06/09/2023   00:16:01  ( -69.89,  -7.95)    2.87                53
 06/11/2023   14:52:23   ( -70.11, 132.94) 06/11/2023   14:53:31  ( -70.13, 133.00)    2.96                68
 06/11/2023   15:43:07   (  70.00, -59.59) 06/11/2023   15:42:58  (  70.01, -59.52)    2.99                 9
 06/11/2023   16:33:44   ( -69.64, 108.27) 06/11/2023   16:32:32  ( -69.69, 107.66)   24.14                72