Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 12.  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)
 01/13/2023   07:10:35   (  70.14,  68.70) 01/13/2023   07:11:05  (  70.14,  68.78)    3.15                30
 01/13/2023   08:01:16   ( -70.01,-123.77) 01/13/2023   08:00:35  ( -70.02,-123.75)    2.27                41
 01/15/2023   22:36:50   ( -70.51,  16.59) 01/15/2023   22:38:01  ( -70.45,  17.47)   33.39                71
 01/15/2023   23:27:28   (  70.08,-175.44) 01/15/2023   23:27:33  (  70.06,-175.44)    1.69                 5
 01/16/2023   00:18:09   ( -69.94,  -7.90) 01/16/2023   00:17:03  ( -69.95,  -7.96)    2.98                66
 01/18/2023   14:53:37   ( -70.13, 132.94) 01/18/2023   14:54:33  ( -70.13, 132.89)    1.89                56
 01/18/2023   15:44:21   (  70.02, -59.58) 01/18/2023   15:44:00  (  70.01, -59.62)    1.65                21
 01/18/2023   16:34:50   ( -69.24, 108.87) 01/18/2023   16:33:41  ( -69.30, 107.04)   72.37                69
 01/21/2023   07:10:29   ( -70.09,-111.22) 01/21/2023   07:10:58  ( -70.11,-111.24)    2.68                29
 01/21/2023   08:01:13   (  69.98,  56.26) 01/21/2023   08:00:25  (  69.99,  56.24)    1.90                48
 01/23/2023   22:36:42   (  70.25,-163.02) 01/23/2023   22:37:53  (  70.22,-162.83)    8.16                71
 01/23/2023   23:27:22   ( -70.05,   4.61) 01/23/2023   23:27:24  ( -70.06,   4.58)    1.72                 2
 01/24/2023   00:18:05   (  69.89, 172.16) 01/24/2023   00:16:52  (  69.89, 171.98)    6.70                73