Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 1.  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)
 08/01/2023   07:59:29   (  70.03,  56.22) 08/01/2023   08:00:04  (  70.01,  56.30)    3.46                35
 08/01/2023   08:50:10   ( -69.89,-136.25) 08/01/2023   08:49:34  ( -69.90,-136.23)    1.62                36
 08/03/2023   23:25:48   ( -70.76,   3.53) 08/03/2023   23:26:56  ( -70.65,   5.47)   72.27                68
 08/04/2023   00:16:19   (  69.97, 172.09) 08/04/2023   00:16:34  (  69.95, 172.09)    2.52                15
 08/04/2023   01:07:00   ( -69.83, -20.38) 08/04/2023   01:06:04  ( -69.84, -20.43)    2.45                56
 08/06/2023   15:42:26   ( -70.03, 120.47) 08/06/2023   15:43:37  ( -70.02, 120.43)    1.58                71
 08/06/2023   16:33:10   (  69.92, -72.06) 08/06/2023   16:33:04  (  69.91, -72.08)    1.02                 6
 08/06/2023   17:23:49   ( -69.67,  95.64) 08/06/2023   17:22:36  ( -69.70,  95.26)   14.95                73
 08/09/2023   07:59:18   ( -70.03,-123.76) 08/09/2023   08:00:06  ( -70.02,-123.68)    3.00                48
 08/09/2023   08:50:01   (  69.88,  43.79) 08/09/2023   08:49:34  (  69.85,  43.72)    3.55                27
 08/09/2023   09:40:26   ( -68.88,-147.47) 08/09/2023   09:39:19  ( -68.93,-149.88)   96.59                67
 08/12/2023   00:16:09   ( -69.99,  -7.92) 08/12/2023   00:16:35  ( -70.00,  -7.84)    2.96                26
 08/12/2023   01:06:52   (  69.84, 159.63) 08/12/2023   01:06:03  (  69.82, 159.57)    2.94                49
 08/14/2023   15:42:20   (  70.22, -59.80) 08/14/2023   15:43:31  (  70.15, -59.36)   18.29                71
 08/14/2023   16:32:59   ( -69.96, 107.92) 08/14/2023   16:33:03  ( -69.94, 107.97)    3.30                 4
 08/14/2023   17:23:42   (  69.81, -84.54) 08/14/2023   17:22:30  (  69.82, -84.55)    1.30                72