Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 3.  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)
 06/03/2023   14:52:25   (  70.14, -47.10) 06/03/2023   14:53:36  (  70.11, -47.07)    3.18                71
 06/03/2023   15:43:06   ( -70.00, 120.43) 06/03/2023   15:43:06  ( -70.00, 120.41)    0.89                 0
 06/03/2023   16:33:47   (  69.72, -71.84) 06/03/2023   16:32:35  (  69.79, -72.24)   17.21                72
 06/06/2023   07:09:19   (  70.08,  68.76) 06/06/2023   07:10:08  (  70.09,  68.78)    1.38                49
 06/06/2023   08:00:01   ( -69.99,-123.79) 06/06/2023   07:59:38  ( -69.98,-123.74)    2.28                23
 06/06/2023   08:50:27   (  68.91,  45.07) 06/06/2023   08:49:21  (  68.99,  42.57)   99.94                66
 06/08/2023   23:26:12   (  70.02,-175.39) 06/08/2023   23:26:39  (  70.05,-175.40)    2.75                27
 06/09/2023   00:16:54   ( -69.94,  -7.94) 06/09/2023   00:16:09  ( -69.94,  -7.92)    1.25                45
 06/11/2023   14:52:29   ( -70.46, 132.39) 06/11/2023   14:53:40  ( -70.32, 133.22)   34.53                71
 06/11/2023   15:43:06   (  69.98, -59.56) 06/11/2023   15:43:11  (  69.99, -59.60)    2.36                 5
 06/11/2023   16:33:48   ( -69.89, 107.90) 06/11/2023   16:32:41  ( -69.89, 107.89)    0.79                67
 06/14/2023   07:09:17   ( -70.10,-111.28) 06/14/2023   07:10:15  ( -70.09,-111.24)    2.30                58
 06/14/2023   08:00:01   (  69.99,  56.19) 06/14/2023   07:59:42  (  69.98,  56.25)    3.09                19
 06/14/2023   08:50:31   ( -69.26,-135.42) 06/14/2023   08:49:22  ( -69.32,-137.01)   62.67                69
 06/16/2023   23:26:11   ( -70.07,   4.54) 06/16/2023   23:26:46  ( -70.05,   4.60)    2.42                35
 06/17/2023   00:16:54   (  69.91, 172.09) 06/17/2023   00:16:13  (  69.94, 172.08)    3.33                41