Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 29.  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   (  70.36, -60.05) 08/30/2023   15:43:40  (  70.25, -59.24)   32.64                71
 08/30/2023   16:33:04   ( -69.91, 107.96) 08/30/2023   16:33:14  ( -69.92, 107.92)    2.11                10
 08/30/2023   17:23:49   (  69.83, -84.62) 08/30/2023   17:22:41  (  69.82, -84.58)    2.43                68
 09/02/2023   07:59:18   (  70.01,  56.24) 09/02/2023   08:00:12  (  70.01,  56.29)    2.12                54
 09/02/2023   08:49:59   ( -69.88,-136.24) 09/02/2023   08:49:42  ( -69.90,-136.23)    2.36                17
 09/02/2023   09:40:30   (  69.06,  32.25) 09/02/2023   09:39:22  (  69.07,  30.31)   76.99                68
 09/05/2023   00:16:13   (  69.94, 172.12) 09/05/2023   00:16:41  (  69.96, 172.11)    2.35                28
 09/05/2023   01:06:55   ( -69.85, -20.44) 09/05/2023   01:06:11  ( -69.85, -20.40)    1.38                44
 09/07/2023   15:42:29   ( -70.25, 120.09) 09/07/2023   15:43:40  ( -70.17, 120.65)   23.33                71
 09/07/2023   16:33:08   (  69.87, -72.02) 09/07/2023   16:33:10  (  69.89, -72.09)    3.51                 2
 09/07/2023   17:23:50   ( -69.78,  95.43) 09/07/2023   17:22:40  ( -69.79,  95.39)    1.33                70
 09/10/2023   07:59:20   ( -69.98,-123.73) 09/10/2023   08:00:11  ( -69.97,-123.74)    1.29                51
 09/10/2023   08:50:04   (  69.86,  43.75) 09/10/2023   08:49:38  (  69.86,  43.75)    1.08                26