Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 27.  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)
 01/29/2023   07:10:25   (  70.13,  68.71) 01/29/2023   07:11:07  (  70.13,  68.74)    1.17                42
 01/29/2023   08:01:07   ( -70.04,-123.84) 01/29/2023   08:00:37  ( -70.03,-123.78)    3.09                30
 01/31/2023   22:36:50   ( -71.09,  15.63) 01/31/2023   22:37:56  ( -70.95,  18.19)   93.71                66
 01/31/2023   23:27:17   (  70.09,-175.45) 01/31/2023   23:27:37  (  70.08,-175.46)    0.53                20
 02/01/2023   00:17:59   ( -70.00,  -8.00) 02/01/2023   00:17:07  ( -69.98,  -7.98)    2.22                52
 02/03/2023   14:53:27   ( -70.26, 132.74) 02/03/2023   14:54:38  ( -70.22, 132.97)    9.79                71
 02/03/2023   15:44:09   (  70.05, -59.62) 02/03/2023   15:44:06  (  70.06, -59.62)    0.69                 3
 02/03/2023   16:34:50   ( -69.90, 107.92) 02/03/2023   16:33:37  ( -69.90, 107.79)    4.94                73
 02/06/2023   07:10:16   ( -70.13,-111.28) 02/06/2023   07:11:07  ( -70.11,-111.31)    2.25                51
 02/06/2023   08:01:00   (  70.02,  56.19) 02/06/2023   08:00:34  (  70.00,  56.18)    2.95                26
 02/06/2023   08:51:25   ( -69.03,-135.05) 02/06/2023   08:50:19  ( -69.07,-137.44)   95.12                66
 02/08/2023   23:27:08   ( -70.11,   4.53) 02/08/2023   23:27:35  ( -70.08,   4.53)    3.37                27
 02/09/2023   00:17:51   (  69.95, 172.07) 02/09/2023   00:17:02  (  69.96, 172.01)    2.59                49