Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 28.  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  (  70.14,  68.74)    1.77                42
 01/29/2023   08:01:07   ( -70.04,-123.84) 01/29/2023   08:00:37  ( -70.03,-123.78)    2.59                30
 01/31/2023   22:36:50   ( -71.08,  15.64) 01/31/2023   22:37:56  ( -70.96,  18.20)   93.71                66
 01/31/2023   23:27:17   (  70.08,-175.44) 01/31/2023   23:27:37  (  70.09,-175.45)    1.36                20
 02/01/2023   00:17:59   ( -69.99,  -7.99) 02/01/2023   00:17:07  ( -69.99,  -7.97)    1.14                52
 02/03/2023   14:53:27   ( -70.26, 132.75) 02/03/2023   14:54:38  ( -70.24, 132.99)    9.47                71
 02/03/2023   15:44:09   (  70.04, -59.61) 02/03/2023   15:44:06  (  70.07, -59.60)    3.33                 3
 02/03/2023   16:34:50   ( -69.90, 107.92) 02/03/2023   16:33:37  ( -69.91, 107.81)    4.58                73
 02/06/2023   07:10:16   ( -70.12,-111.27) 02/06/2023   07:11:07  ( -70.14,-111.27)    1.75                51
 02/06/2023   08:01:00   (  70.02,  56.20) 02/06/2023   08:00:34  (  70.03,  56.21)    1.11                26
 02/06/2023   08:51:26   ( -69.07,-135.12) 02/06/2023   08:50:19  ( -69.10,-137.41)   90.94                67
 02/08/2023   23:27:08   ( -70.10,   4.54) 02/08/2023   23:27:35  ( -70.12,   4.58)    2.68                27
 02/09/2023   00:17:52   (  70.00, 172.00) 02/09/2023   00:17:02  (  70.01, 172.07)    2.48                50