Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 26.  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)
 06/27/2023   14:52:32   ( -70.87, 131.73) 06/27/2023   14:53:39  ( -70.76, 133.89)   79.63                67
 06/27/2023   15:43:02   (  70.02, -59.62) 06/27/2023   15:43:18  (  70.01, -59.57)    1.91                16
 06/27/2023   16:33:43   ( -69.88, 107.92) 06/27/2023   16:32:48  ( -69.90, 107.90)    2.49                55
 06/30/2023   07:09:10   ( -70.09,-111.26) 06/30/2023   07:10:22  ( -70.08,-111.25)    1.11                72
 06/30/2023   07:59:54   (  69.98,  56.22) 06/30/2023   07:59:49  (  69.98,  56.25)    1.39                 5
 06/30/2023   08:50:33   ( -69.73,-136.09) 06/30/2023   08:49:21  ( -69.76,-136.42)   13.21                72
 07/02/2023   23:26:03   ( -70.05,   4.57) 07/02/2023   23:26:53  ( -70.08,   4.63)    3.21                50
 07/03/2023   00:16:46   (  69.90, 172.12) 07/03/2023   00:16:21  (  69.91, 172.04)    3.54                25
 07/03/2023   01:07:12   ( -68.95, -19.21) 07/03/2023   01:06:05  ( -69.04, -21.50)   91.94                67
 07/05/2023   15:42:56   ( -70.03, 120.39) 07/05/2023   15:43:24  ( -70.04, 120.46)    3.30                28
 07/05/2023   16:33:39   (  69.87, -72.07) 07/05/2023   16:32:52  (  69.88, -72.13)    2.21                47
 07/08/2023   07:09:11   (  70.33,  68.38) 07/08/2023   07:10:22  (  70.25,  69.00)   24.77                71
 07/08/2023   07:59:48   ( -69.96,-123.73) 07/08/2023   07:59:55  ( -69.98,-123.75)    2.90                 7
 07/08/2023   08:50:32   (  69.86,  43.72) 07/08/2023   08:49:22  (  69.87,  43.74)    1.16                70