Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 14.  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   (  70.37, -60.03) 08/14/2023   15:43:34  (  70.28, -59.20)   32.84                71
 08/14/2023   16:32:58   ( -69.92, 107.99) 08/14/2023   16:33:08  ( -69.95, 107.96)    3.30                10
 08/14/2023   17:23:43   (  69.86, -84.61) 08/14/2023   17:22:35  (  69.84, -84.54)    3.07                68
 08/17/2023   07:59:07   (  69.99,  56.35) 08/17/2023   08:00:10  (  70.01,  56.29)    3.30                63
 08/17/2023   08:49:49   ( -69.90,-136.20) 08/17/2023   08:49:40  ( -69.90,-136.23)    1.12                 9
 08/17/2023   09:40:25   (  69.36,  31.89) 08/17/2023   09:39:14  (  69.41,  30.74)   45.39                71
 08/20/2023   00:15:57   (  69.98, 172.15) 08/20/2023   00:16:40  (  69.99, 172.14)    1.59                43
 08/20/2023   01:06:39   ( -69.89, -20.40) 08/20/2023   01:06:10  ( -69.89, -20.37)    1.02                29
 08/22/2023   16:32:48   (  69.97, -72.06) 08/22/2023   16:33:11  (  69.95, -72.04)    2.73                23
 08/22/2023   17:23:29   ( -69.83,  95.47) 08/22/2023   17:22:41  ( -69.85,  95.46)    2.41                48
 08/25/2023   07:59:00   ( -70.35,-124.16) 08/25/2023   08:00:11  ( -70.22,-123.41)   31.13                71
 08/25/2023   08:49:38   (  69.92,  43.80) 08/25/2023   08:49:41  (  69.94,  43.83)    2.41                 3
 08/25/2023   09:40:20   ( -69.83,-148.74) 08/25/2023   09:39:11  ( -69.84,-148.67)    3.11                69
 08/28/2023   00:15:44   ( -69.99,  -7.82) 08/28/2023   00:16:45  ( -69.97,  -7.89)    2.94                61
 08/28/2023   01:06:28   (  69.88, 159.65) 08/28/2023   01:06:11  (  69.91, 159.67)    3.31                17