Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 4.  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)
 09/05/2023   00:16:14   (  69.97, 172.07) 09/05/2023   00:16:41  (  69.98, 172.14)    2.78                27
 09/05/2023   01:06:55   ( -69.84, -20.41) 09/05/2023   01:06:11  ( -69.86, -20.39)    3.18                44
 09/07/2023   15:42:28   ( -70.24, 120.11) 09/07/2023   15:43:39  ( -70.17, 120.65)   21.90                71
 09/07/2023   16:33:08   (  69.90, -72.07) 09/07/2023   16:33:09  (  69.90, -72.09)    1.17                 1
 09/07/2023   17:23:49   ( -69.77,  95.45) 09/07/2023   17:22:39  ( -69.78,  95.39)    2.74                70
 09/10/2023   07:59:19   ( -69.97,-123.72) 09/10/2023   08:00:10  ( -69.95,-123.77)    3.21                51
 09/10/2023   08:50:03   (  69.85,  43.78) 09/10/2023   08:49:37  (  69.84,  43.73)    2.10                26
 09/10/2023   09:40:28   ( -68.87,-147.50) 09/10/2023   09:39:22  ( -68.91,-149.88)   95.46                66
 09/12/2023   23:25:48   (  70.86,-176.66) 09/12/2023   23:26:54  (  70.75,-174.34)   85.92                66
 09/13/2023   00:16:14   ( -69.93,  -7.88) 09/13/2023   00:16:37  ( -69.93,  -7.90)    0.94                23
 09/13/2023   01:06:58   (  69.81, 159.61) 09/13/2023   01:06:04  (  69.82, 159.59)    1.40                54
 09/15/2023   15:42:27   (  69.98, -59.51) 09/15/2023   15:43:34  (  69.98, -59.56)    2.19                67
 09/15/2023   16:33:09   ( -69.89, 107.94) 09/15/2023   16:33:04  ( -69.88, 107.92)    1.42                 5
 09/15/2023   17:23:47   (  69.45, -84.11) 09/15/2023   17:22:36  (  69.49, -84.97)   33.74                71