Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 31.  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)
 01/31/2023   22:36:50   ( -71.07,  15.66) 01/31/2023   22:37:56  ( -70.98,  18.23)   93.42                66
 01/31/2023   23:27:17   (  70.06,-175.42) 01/31/2023   23:27:38  (  70.06,-175.50)    3.02                21
 02/01/2023   00:17:59   ( -69.98,  -7.97) 02/01/2023   00:17:07  ( -70.00,  -7.94)    3.07                52
 02/03/2023   14:53:26   ( -70.24, 132.78) 02/03/2023   14:54:38  ( -70.22, 132.96)    7.25                72
 02/03/2023   15:44:09   (  70.07, -59.66) 02/03/2023   15:44:06  (  70.06, -59.63)    2.24                 3
 02/03/2023   16:34:50   ( -69.93, 107.87) 02/03/2023   16:33:36  ( -69.95, 107.86)    1.91                74
 02/06/2023   07:10:17   ( -70.15,-111.31) 02/06/2023   07:11:08  ( -70.14,-111.27)    1.39                51
 02/06/2023   08:01:01   (  70.04,  56.17) 02/06/2023   08:00:35  (  70.03,  56.22)    1.84                26
 02/06/2023   08:51:27   ( -69.10,-135.15) 02/06/2023   08:50:20  ( -69.10,-137.41)   89.48                67
 02/08/2023   23:27:09   ( -70.11,   4.52) 02/08/2023   23:27:37  ( -70.10,   4.55)    1.53                28
 02/09/2023   00:17:53   (  70.00, 171.99) 02/09/2023   00:17:04  (  69.99, 172.04)    2.27                49
 02/11/2023   14:53:22   (  70.34, -47.37) 02/11/2023   14:54:34  (  70.26, -46.98)   17.41                72
 02/11/2023   15:44:00   ( -70.03, 120.42) 02/11/2023   15:44:06  ( -70.05, 120.35)    2.99                 6
 02/11/2023   16:34:44   (  69.93, -72.11) 02/11/2023   16:33:33  (  69.93, -72.16)    2.00                71