Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 9.  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)
 01/10/2023   14:53:42   (  70.18, -47.13) 01/10/2023   14:54:38  (  70.16, -47.07)    3.18                56
 01/10/2023   15:44:23   ( -70.04, 120.40) 01/10/2023   15:44:08  ( -70.05, 120.41)    0.97                15
 01/10/2023   16:34:55   (  69.29, -71.18) 01/10/2023   16:33:46  (  69.34, -72.92)   68.59                69
 01/13/2023   07:10:34   (  70.10,  68.76) 01/13/2023   07:11:05  (  70.13,  68.76)    2.32                31
 01/13/2023   08:01:16   ( -70.01,-123.79) 01/13/2023   08:00:35  ( -70.02,-123.76)    1.10                41
 01/15/2023   22:36:50   ( -70.51,  16.58) 01/15/2023   22:38:01  ( -70.45,  17.47)   33.79                71
 01/15/2023   23:27:28   (  70.09,-175.45) 01/15/2023   23:27:33  (  70.06,-175.45)    2.86                 5
 01/16/2023   00:18:09   ( -69.94,  -7.91) 01/16/2023   00:17:03  ( -69.95,  -7.96)    2.47                66
 01/18/2023   14:53:37   ( -70.13, 132.94) 01/18/2023   14:54:33  ( -70.14, 132.91)    1.55                56
 01/18/2023   15:44:21   (  70.02, -59.58) 01/18/2023   15:44:00  (  70.02, -59.61)    0.98                21
 01/18/2023   16:34:50   ( -69.24, 108.88) 01/18/2023   16:33:41  ( -69.31, 107.06)   72.06                69
 01/21/2023   07:10:31   ( -70.12,-111.28) 01/21/2023   07:10:59  ( -70.13,-111.21)    2.97                28
 01/21/2023   08:01:14   (  69.97,  56.27) 01/21/2023   08:00:27  (  69.96,  56.19)    2.91                47