Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 28.  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)
 08/30/2023   15:42:29   (  70.35, -60.05) 08/30/2023   15:43:40  (  70.26, -59.23)   32.30                71
 08/30/2023   16:33:04   ( -69.90, 107.97) 08/30/2023   16:33:14  ( -69.93, 107.93)    3.05                10
 08/30/2023   17:23:49   (  69.83, -84.62) 08/30/2023   17:22:41  (  69.82, -84.57)    1.89                68
 09/02/2023   07:59:18   (  70.01,  56.25) 09/02/2023   08:00:12  (  70.01,  56.30)    1.86                54
 09/02/2023   08:49:59   ( -69.87,-136.23) 09/02/2023   08:49:42  ( -69.90,-136.22)    3.21                17
 09/02/2023   09:40:30   (  69.06,  32.25) 09/02/2023   09:39:22  (  69.07,  30.31)   77.18                68
 09/05/2023   00:16:13   (  69.93, 172.12) 09/05/2023   00:16:41  (  69.96, 172.11)    2.63                28
 09/05/2023   01:06:55   ( -69.85, -20.43) 09/05/2023   01:06:11  ( -69.85, -20.40)    1.10                44
 09/07/2023   15:42:29   ( -70.25, 120.10) 09/07/2023   15:43:40  ( -70.16, 120.64)   22.77                71
 09/07/2023   16:33:09   (  69.92, -72.09) 09/07/2023   16:33:09  (  69.94, -72.03)    3.29                 0
 09/07/2023   17:23:50   ( -69.78,  95.44) 09/07/2023   17:22:40  ( -69.78,  95.39)    1.96                70
 09/10/2023   07:59:20   ( -69.98,-123.72) 09/10/2023   08:00:11  ( -69.96,-123.75)    2.35                51
 09/10/2023   08:50:04   (  69.86,  43.76) 09/10/2023   08:49:38  (  69.84,  43.73)    2.32                26