Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 8.  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)
 08/09/2023   07:59:17   ( -70.00,-123.71) 08/09/2023   08:00:06  ( -70.00,-123.72)    0.46                49
 08/09/2023   08:50:01   (  69.89,  43.77) 08/09/2023   08:49:33  (  69.90,  43.78)    0.80                28
 08/09/2023   09:40:25   ( -68.85,-147.42) 08/09/2023   09:39:19  ( -68.90,-149.91)   99.78                66
 08/11/2023   23:25:44   (  71.01,-176.85) 08/11/2023   23:26:50  (  70.90,-174.14)   99.15                66
 08/12/2023   00:16:08   ( -69.97,  -7.87) 08/12/2023   00:16:35  ( -69.97,  -7.88)    0.23                27
 08/12/2023   01:06:52   (  69.86, 159.60) 08/12/2023   01:06:02  (  69.86, 159.62)    0.67                50
 08/14/2023   15:42:19   (  70.20, -59.76) 08/14/2023   15:43:31  (  70.12, -59.40)   15.78                72
 08/14/2023   16:32:58   ( -69.95, 107.95) 08/14/2023   16:33:02  ( -69.96, 108.00)    2.91                 4
 08/14/2023   17:23:41   (  69.78, -84.51) 08/14/2023   17:22:30  (  69.79, -84.58)    3.18                71
 08/17/2023   07:59:07   (  70.03,  56.29) 08/17/2023   08:00:00  (  70.03,  56.36)    2.70                53
 08/17/2023   08:49:48   ( -69.88,-136.17) 08/17/2023   08:49:31  ( -69.87,-136.23)    2.32                17
 08/17/2023   09:40:18   (  69.03,  32.36) 08/17/2023   09:39:10  (  69.09,  30.37)   79.55                68
 08/20/2023   00:15:57   (  69.97, 172.16) 08/20/2023   00:16:28  (  69.97, 172.16)    0.12                31
 08/20/2023   01:06:39   ( -69.87, -20.37) 08/20/2023   01:05:58  ( -69.87, -20.34)    1.15                41