Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 7.  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   ( -69.99,-123.69) 08/09/2023   08:00:06  ( -70.01,-123.70)    1.96                49
 08/09/2023   08:50:01   (  69.88,  43.78) 08/09/2023   08:49:33  (  69.91,  43.80)    2.71                28
 08/09/2023   09:40:25   ( -68.84,-147.41) 08/09/2023   09:39:19  ( -68.91,-149.89)   99.80                66
 08/12/2023   00:16:08   ( -69.96,  -7.86) 08/12/2023   00:16:35  ( -69.98,  -7.86)    2.14                27
 08/12/2023   01:06:52   (  69.85, 159.61) 08/12/2023   01:06:02  (  69.87, 159.63)    2.31                50
 08/14/2023   15:42:20   (  70.24, -59.83) 08/14/2023   15:43:31  (  70.14, -59.38)   20.45                71
 08/14/2023   16:32:58   ( -69.94, 107.96) 08/14/2023   16:33:03  ( -69.92, 107.95)    1.63                 5
 08/14/2023   17:23:42   (  69.83, -84.57) 08/14/2023   17:22:30  (  69.81, -84.56)    2.32                72
 08/17/2023   07:59:07   (  70.02,  56.30) 08/17/2023   08:00:01  (  69.99,  56.31)    2.55                54
 08/17/2023   08:49:48   ( -69.87,-136.16) 08/17/2023   08:49:31  ( -69.89,-136.20)    3.20                17
 08/17/2023   09:40:18   (  69.02,  32.37) 08/17/2023   09:39:11  (  69.06,  30.32)   81.76                67
 08/20/2023   00:15:57   (  69.96, 172.18) 08/20/2023   00:16:29  (  69.93, 172.12)    3.51                32
 08/20/2023   01:06:39   ( -69.86, -20.36) 08/20/2023   01:05:59  ( -69.84, -20.39)    3.06                40