Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 8 4.  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)
 08/06/2023   15:42:26   ( -70.05, 120.43) 08/06/2023   15:43:36  ( -70.05, 120.47)    1.48                70
 08/06/2023   16:33:10   (  69.95, -72.09) 08/06/2023   16:33:03  (  69.95, -72.03)    2.24                 7
 08/06/2023   17:23:48   ( -69.64,  95.67) 08/06/2023   17:22:35  ( -69.73,  95.30)   17.33                73
 08/09/2023   07:59:17   ( -70.02,-123.73) 08/09/2023   08:00:06  ( -69.99,-123.73)    3.12                49
 08/09/2023   08:50:01   (  69.91,  43.74) 08/09/2023   08:49:33  (  69.88,  43.76)    3.43                28
 08/09/2023   09:40:25   ( -68.86,-147.44) 08/09/2023   09:39:19  ( -68.89,-149.93)   99.56                66
 08/12/2023   00:16:08   ( -69.99,  -7.90) 08/12/2023   00:16:34  ( -70.00,  -7.82)    3.52                26
 08/12/2023   01:06:51   (  69.83, 159.65) 08/12/2023   01:06:02  (  69.84, 159.59)    2.57                49
 08/14/2023   15:42:20   (  70.22, -59.79) 08/14/2023   15:43:31  (  70.15, -59.36)   18.15                71
 08/14/2023   16:32:58   ( -69.91, 108.00) 08/14/2023   16:33:03  ( -69.94, 107.97)    2.94                 5
 08/14/2023   17:23:42   (  69.81, -84.54) 08/14/2023   17:22:30  (  69.82, -84.55)    1.21                72
 08/17/2023   07:59:06   (  70.00,  56.33) 08/17/2023   08:00:00  (  69.99,  56.31)    1.12                54
 08/17/2023   08:49:48   ( -69.90,-136.20) 08/17/2023   08:49:30  ( -69.89,-136.20)    0.71                18
 08/17/2023   09:40:17   (  69.00,  32.40) 08/17/2023   09:39:10  (  69.05,  30.32)   82.80                67