Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 8.  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   14:53:41   (  70.15, -47.07) 01/10/2023   14:54:38  (  70.15, -47.09)    0.65                57
 01/10/2023   15:44:23   ( -70.06, 120.38) 01/10/2023   15:44:08  ( -70.04, 120.39)    2.64                15
 01/10/2023   16:34:54   (  69.25, -71.13) 01/10/2023   16:33:46  (  69.32, -72.95)   71.73                68
 01/13/2023   07:10:35   (  70.12,  68.73) 01/13/2023   07:11:06  (  70.11,  68.74)    1.48                31
 01/13/2023   08:01:16   ( -69.98,-123.73) 01/13/2023   08:00:36  ( -70.00,-123.78)    3.13                40
 01/15/2023   22:36:50   ( -70.53,  16.55) 01/15/2023   22:38:01  ( -70.43,  17.45)   34.95                71
 01/15/2023   23:27:27   (  70.05,-175.39) 01/15/2023   23:27:33  (  70.05,-175.47)    2.77                 6
 01/16/2023   00:18:09   ( -69.96,  -7.94) 01/16/2023   00:17:03  ( -69.94,  -7.98)    2.52                66
 01/18/2023   14:53:37   ( -70.15, 132.92) 01/18/2023   14:54:33  ( -70.13, 132.89)    2.46                56
 01/18/2023   15:44:21   (  70.04, -59.61) 01/18/2023   15:44:00  (  70.01, -59.63)    3.34                21
 01/18/2023   16:34:50   ( -69.26, 108.85) 01/18/2023   16:33:41  ( -69.30, 107.04)   71.33                69
 01/21/2023   07:10:30   ( -70.09,-111.23) 01/21/2023   07:11:00  ( -70.07,-111.30)    3.46                30
 01/21/2023   08:01:14   (  69.99,  56.24) 01/21/2023   08:00:26  (  70.01,  56.26)    2.41                48