Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 13.  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)
 08/14/2023   15:42:23   (  70.38, -60.03) 08/14/2023   15:43:34  (  70.28, -59.20)   33.04                71
 08/14/2023   16:32:59   ( -69.97, 107.91) 08/14/2023   16:33:08  ( -69.95, 107.97)    3.13                 9
 08/14/2023   17:23:43   (  69.86, -84.61) 08/14/2023   17:22:35  (  69.85, -84.53)    3.25                68
 08/17/2023   07:59:08   (  70.04,  56.27) 08/17/2023   08:00:10  (  70.03,  56.32)    2.21                62
 08/17/2023   08:49:49   ( -69.90,-136.20) 08/17/2023   08:49:40  ( -69.92,-136.20)    2.98                 9
 08/17/2023   09:40:25   (  69.36,  31.89) 08/17/2023   09:39:14  (  69.43,  30.77)   44.56                71
 08/20/2023   00:15:57   (  69.98, 172.15) 08/20/2023   00:16:41  (  69.99, 172.14)    1.69                44
 08/20/2023   01:06:39   ( -69.88, -20.39) 08/20/2023   01:06:11  ( -69.89, -20.37)    0.92                28
 08/22/2023   16:32:48   (  69.97, -72.06) 08/22/2023   16:33:13  (  69.94, -72.06)    3.31                25
 08/22/2023   17:23:29   ( -69.82,  95.48) 08/22/2023   17:22:43  ( -69.84,  95.44)    2.53                46
 08/25/2023   07:59:02   ( -70.44,-124.31) 08/25/2023   08:00:12  ( -70.33,-123.28)   40.92                70
 08/25/2023   08:49:38   (  69.92,  43.81) 08/25/2023   08:49:44  (  69.94,  43.81)    1.97                 6
 08/25/2023   09:40:20   ( -69.82,-148.73) 08/25/2023   09:39:14  ( -69.84,-148.69)    2.44                66