Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 26.  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)
 01/26/2023   14:53:33   (  70.14, -47.07) 01/26/2023   14:54:38  (  70.15, -47.11)    2.28                65
 01/26/2023   15:44:14   ( -70.05, 120.37) 01/26/2023   15:44:07  ( -70.04, 120.37)    0.90                 7
 01/26/2023   16:34:51   (  69.56, -71.59) 01/26/2023   16:33:40  (  69.61, -72.59)   39.09                71
 01/29/2023   07:10:25   (  70.13,  68.70) 01/29/2023   07:11:07  (  70.13,  68.73)    1.19                42
 01/29/2023   08:01:06   ( -69.99,-123.77) 01/29/2023   08:00:37  ( -70.02,-123.79)    3.21                29
 01/31/2023   22:36:49   ( -71.04,  15.71) 01/31/2023   22:37:56  ( -70.94,  18.17)   89.63                67
 01/31/2023   23:27:17   (  70.09,-175.46) 01/31/2023   23:27:37  (  70.07,-175.48)    2.62                20
 02/01/2023   00:17:58   ( -69.95,  -7.92) 02/01/2023   00:17:07  ( -69.96,  -8.00)    3.41                51
 02/03/2023   14:53:26   ( -70.22, 132.81) 02/03/2023   14:54:38  ( -70.20, 132.94)    5.11                72
 02/03/2023   15:44:09   (  70.06, -59.63) 02/03/2023   15:44:06  (  70.03, -59.66)    3.30                 3
 02/03/2023   16:34:49   ( -69.86, 107.99) 02/03/2023   16:33:37  ( -69.87, 107.75)    9.02                72
 02/06/2023   07:10:17   ( -70.14,-111.29) 02/06/2023   07:11:07  ( -70.12,-111.29)    1.57                50
 02/06/2023   08:01:00   (  70.03,  56.18) 02/06/2023   08:00:33  (  70.01,  56.20)    2.86                27
 02/06/2023   08:51:25   ( -69.04,-135.06) 02/06/2023   08:50:18  ( -69.08,-137.42)   93.83                67
 02/08/2023   22:36:43   (  71.12,-164.41) 02/08/2023   22:37:48  (  71.05,-161.65)   99.81                65
 02/08/2023   23:27:07   ( -70.07,   4.59) 02/08/2023   23:27:34  ( -70.07,   4.52)    2.39                27
 02/09/2023   00:17:51   (  69.97, 172.05) 02/09/2023   00:17:01  (  69.95, 172.00)    2.43                50