Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 9.  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)
 07/10/2023   23:25:59   (  70.04,-175.39) 07/10/2023   23:26:57  (  70.03,-175.44)    1.90                58
 07/11/2023   00:16:41   ( -69.94,  -7.93) 07/11/2023   00:16:27  ( -69.92,  -7.96)    3.29                14
 07/11/2023   01:07:13   (  69.20, 160.46) 07/11/2023   01:06:04  (  69.26, 158.79)   66.09                69
 07/13/2023   15:42:51   (  70.03, -59.61) 07/13/2023   15:43:26  (  70.01, -59.59)    2.83                35
 07/13/2023   16:33:32   ( -69.88, 107.94) 07/13/2023   16:32:56  ( -69.90, 107.89)    2.49                36
 07/16/2023   07:09:11   ( -70.71,-112.21) 07/16/2023   07:10:19  ( -70.62,-110.46)   65.34                68
 07/16/2023   07:59:43   (  69.98,  56.25) 07/16/2023   07:59:56  (  69.96,  56.24)    1.87                13
 07/16/2023   08:50:25   ( -69.88,-136.28) 07/16/2023   08:49:26  ( -69.86,-136.28)    2.41                59
 07/18/2023   23:25:52   ( -70.09,   4.55) 07/18/2023   23:26:58  ( -70.06,   4.62)    3.48                66
 07/19/2023   00:16:35   (  69.94, 172.09) 07/19/2023   00:16:25  (  69.95, 172.11)    2.04                10
 07/19/2023   01:07:12   ( -69.57, -20.05) 07/19/2023   01:06:00  ( -69.57, -20.78)   28.50                72
 07/21/2023   15:42:44   ( -70.05, 120.39) 07/21/2023   15:43:27  ( -70.04, 120.47)    3.17                43
 07/21/2023   16:33:27   (  69.90, -72.08) 07/21/2023   16:32:54  (  69.92, -72.05)    2.65                33