Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 10.  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)
 08/11/2023   23:25:44   (  71.01,-176.85) 08/11/2023   23:26:50  (  70.90,-174.13)   99.28                66
 08/12/2023   00:16:08   ( -69.97,  -7.88) 08/12/2023   00:16:35  ( -69.97,  -7.88)    0.78                27
 08/12/2023   01:06:52   (  69.86, 159.60) 08/12/2023   01:06:02  (  69.86, 159.62)    0.81                50
 08/14/2023   15:42:19   (  70.20, -59.76) 08/14/2023   15:43:31  (  70.13, -59.39)   15.83                72
 08/14/2023   16:32:58   ( -69.95, 107.94) 08/14/2023   16:33:02  ( -69.97, 108.01)    3.31                 4
 08/14/2023   17:23:41   (  69.79, -84.51) 08/14/2023   17:22:30  (  69.80, -84.57)    3.10                71
 08/17/2023   07:59:06   (  69.97,  56.37) 08/17/2023   08:00:01  (  69.99,  56.30)    3.22                55
 08/17/2023   08:49:48   ( -69.88,-136.17) 08/17/2023   08:49:31  ( -69.89,-136.21)    1.55                17
 08/17/2023   09:40:18   (  69.03,  32.36) 08/17/2023   09:39:10  (  69.11,  30.39)   78.84                68
 08/20/2023   00:15:57   (  69.97, 172.16) 08/20/2023   00:16:28  (  70.00, 172.20)    3.22                31
 08/20/2023   01:06:39   ( -69.87, -20.38) 08/20/2023   01:05:58  ( -69.89, -20.31)    3.34                41
 08/22/2023   15:42:12   ( -70.50, 119.82) 08/22/2023   15:43:22  ( -70.42, 121.06)   46.95                70
 08/22/2023   16:32:47   (  69.92, -71.98) 08/22/2023   16:32:56  (  69.92, -72.01)    1.33                 9
 08/22/2023   17:23:29   ( -69.82,  95.48) 08/22/2023   17:22:26  ( -69.82,  95.48)    0.52                63