Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 29.  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)
 07/29/2023   15:42:37   (  70.03, -59.57) 07/29/2023   15:43:33  (  70.05, -59.52)    2.85                56
 07/29/2023   16:33:19   ( -69.94, 107.89) 07/29/2023   16:33:03  ( -69.94, 107.95)    2.52                16
 07/29/2023   17:23:50   (  69.14, -83.64) 07/29/2023   17:22:42  (  69.18, -85.44)   71.16                68
 08/01/2023   07:59:27   (  69.97,  56.31) 08/01/2023   08:00:04  (  69.97,  56.24)    2.88                37
 08/01/2023   08:50:09   ( -69.87,-136.23) 08/01/2023   08:49:34  ( -69.86,-136.28)    2.38                35
 08/03/2023   23:25:48   ( -70.75,   3.56) 08/03/2023   23:26:56  ( -70.68,   5.51)   72.24                68
 08/04/2023   00:16:19   (  69.96, 172.10) 08/04/2023   00:16:34  (  69.97, 172.12)    1.43                15
 08/04/2023   01:07:01   ( -69.86, -20.44) 08/04/2023   01:06:04  ( -69.87, -20.39)    1.73                57
 08/06/2023   15:42:27   ( -70.06, 120.42) 08/06/2023   15:43:37  ( -70.07, 120.49)    2.73                70
 08/06/2023   16:33:10   (  69.91, -72.04) 08/06/2023   16:33:05  (  69.90, -72.10)    2.69                 5
 08/06/2023   17:23:49   ( -69.65,  95.66) 08/06/2023   17:22:37  ( -69.69,  95.24)   16.75                72
 08/09/2023   07:59:18   ( -70.01,-123.73) 08/09/2023   08:00:07  ( -70.03,-123.68)    2.33                49
 08/09/2023   08:50:02   (  69.91,  43.73) 08/09/2023   08:49:34  (  69.91,  43.80)    2.56                28
 08/09/2023   09:40:26   ( -68.86,-147.44) 08/09/2023   09:39:20  ( -68.93,-149.88)   97.75                66