Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 5.  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)
 06/06/2023   07:09:19   (  70.09,  68.74) 06/06/2023   07:10:08  (  70.06,  68.75)    3.32                49
 06/06/2023   08:00:00   ( -69.96,-123.74) 06/06/2023   07:59:38  ( -69.95,-123.78)    1.58                22
 06/06/2023   08:50:27   (  68.93,  45.04) 06/06/2023   08:49:21  (  68.97,  42.54)   99.90                66
 06/08/2023   23:26:13   (  70.04,-175.42) 06/08/2023   23:26:40  (  70.02,-175.44)    2.60                27
 06/09/2023   00:16:54   ( -69.90,  -7.89) 06/09/2023   00:16:10  ( -69.91,  -7.96)    3.01                44
 06/11/2023   14:52:29   ( -70.42, 132.45) 06/11/2023   14:53:40  ( -70.33, 133.24)   31.26                71
 06/11/2023   15:43:07   (  69.99, -59.58) 06/11/2023   15:43:11  (  70.01, -59.58)    1.51                 4
 06/11/2023   16:33:49   ( -69.90, 107.88) 06/11/2023   16:32:41  ( -69.90, 107.90)    1.05                68
 06/14/2023   07:09:16   ( -70.06,-111.22) 06/14/2023   07:10:14  ( -70.09,-111.24)    2.38                58
 06/14/2023   08:00:00   (  69.95,  56.25) 06/14/2023   07:59:41  (  69.98,  56.25)    2.33                19
 06/14/2023   08:50:31   ( -69.28,-135.44) 06/14/2023   08:49:21  ( -69.32,-137.01)   61.61                70
 06/16/2023   23:26:10   ( -70.03,   4.60) 06/16/2023   23:26:45  ( -70.03,   4.57)    1.43                35
 06/17/2023   00:16:54   (  69.92, 172.07) 06/17/2023   00:16:12  (  69.92, 172.06)    0.48                42