Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 7.  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)
 02/08/2023   23:27:09   ( -70.12,   4.51) 02/08/2023   23:27:36  ( -70.12,   4.58)    2.71                27
 02/09/2023   00:17:52   (  69.95, 172.07) 02/09/2023   00:17:04  (  69.96, 172.00)    3.06                48
 02/11/2023   14:53:21   (  70.35, -47.39) 02/11/2023   14:54:32  (  70.25, -46.99)   18.83                71
 02/11/2023   15:43:59   ( -70.05, 120.39) 02/11/2023   15:44:04  ( -70.03, 120.33)    3.05                 5
 02/11/2023   16:34:43   (  69.94, -72.13) 02/11/2023   16:33:31  (  69.92, -72.17)    2.28                72
 02/14/2023   07:10:09   (  70.14,  68.72) 02/14/2023   07:11:01  (  70.13,  68.72)    0.92                52
 02/14/2023   08:00:51   ( -70.04,-123.82) 02/14/2023   08:00:31  ( -70.02,-123.80)    2.87                20
 02/14/2023   08:51:19   (  69.08,  44.88) 02/14/2023   08:50:12  (  69.14,  42.65)   88.41                67
 02/16/2023   23:27:00   (  70.09,-175.43) 02/16/2023   23:27:28  (  70.09,-175.45)    0.83                28
 02/17/2023   00:17:42   ( -70.00,  -7.97) 02/17/2023   00:16:58  ( -69.98,  -7.97)    1.82                44
 02/19/2023   14:53:13   ( -70.47, 132.44) 02/19/2023   14:54:24  ( -70.35, 133.17)   30.39                71
 02/19/2023   15:43:51   (  70.05, -59.60) 02/19/2023   15:43:54  (  70.07, -59.59)    1.74                 3
 02/19/2023   16:34:33   ( -69.96, 107.87) 02/19/2023   16:33:24  ( -69.96, 107.90)    1.44                69