Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 14.  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)
 01/15/2023   22:36:50   ( -70.54,  16.54) 01/15/2023   22:38:01  ( -70.41,  17.41)   35.46                71
 01/15/2023   23:27:27   (  70.05,-175.40) 01/15/2023   23:27:32  (  70.08,-175.41)    3.44                 5
 01/16/2023   00:18:09   ( -69.97,  -7.95) 01/16/2023   00:17:02  ( -69.97,  -7.94)    0.64                67
 01/18/2023   14:53:36   ( -70.11, 132.97) 01/18/2023   14:54:32  ( -70.13, 132.90)    3.27                56
 01/18/2023   15:44:21   (  70.05, -59.63) 01/18/2023   15:43:59  (  70.02, -59.61)    3.39                22
 01/18/2023   16:34:49   ( -69.22, 108.90) 01/18/2023   16:33:41  ( -69.25, 106.98)   75.84                68
 01/21/2023   07:10:30   ( -70.12,-111.28) 01/21/2023   07:10:58  ( -70.10,-111.26)    2.91                28
 01/21/2023   08:01:14   (  70.01,  56.20) 01/21/2023   08:00:25  (  69.98,  56.23)    3.24                49
 01/23/2023   22:36:42   (  70.24,-163.00) 01/23/2023   22:37:53  (  70.19,-162.86)    7.64                71
 01/23/2023   23:27:23   ( -70.09,   4.54) 01/23/2023   23:27:23  ( -70.08,   4.62)    2.96                 0
 01/24/2023   00:18:04   (  69.82, 172.25) 01/24/2023   00:16:52  (  69.86, 171.95)   12.37                72
 01/26/2023   14:53:32   (  70.12, -47.04) 01/26/2023   14:54:17  (  70.14, -47.04)    2.46                45
 01/26/2023   15:44:14   ( -70.02, 120.43) 01/26/2023   15:43:47  ( -70.03, 120.45)    1.93                27