Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 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)
 02/14/2023   07:10:14   (  70.14,  68.69) 02/14/2023   07:11:01  (  70.12,  68.71)    1.89                47
 02/14/2023   08:00:55   ( -70.00,-123.78) 02/14/2023   08:00:31  ( -70.01,-123.82)    1.90                24
 02/16/2023   22:36:41   ( -71.04,  15.70) 02/16/2023   22:37:48  ( -70.92,  18.13)   89.16                67
 02/16/2023   23:27:09   (  70.09,-175.47) 02/16/2023   23:27:28  (  70.11,-175.43)    2.64                19
 02/17/2023   00:17:51   ( -69.99,  -8.01) 02/17/2023   00:16:58  ( -69.99,  -7.96)    1.97                53
 02/19/2023   14:53:20   ( -70.16, 132.87) 02/19/2023   14:54:28  ( -70.14, 132.86)    2.30                68
 02/19/2023   15:44:04   (  70.05, -59.65) 02/19/2023   15:43:55  (  70.03, -59.64)    1.65                 9
 02/19/2023   16:34:41   ( -69.69, 108.21) 02/19/2023   16:33:28  ( -69.75, 107.60)   24.31                73
 02/22/2023   07:10:14   ( -70.14,-111.33) 02/22/2023   07:10:52  ( -70.13,-111.26)    2.63                38
 02/22/2023   08:00:58   (  70.03,  56.15) 02/22/2023   08:00:19  (  70.02,  56.23)    3.26                39
 02/24/2023   22:36:32   (  70.49,-163.44) 02/24/2023   22:37:43  (  70.39,-162.62)   32.57                71
 02/24/2023   23:27:08   ( -70.08,   4.53) 02/24/2023   23:27:17  ( -70.06,   4.54)    2.03                 9
 02/25/2023   00:17:52   (  69.97, 172.00) 02/25/2023   00:16:44  (  69.95, 172.03)    2.98                68
 02/27/2023   14:53:20   (  70.14, -47.11) 02/27/2023   14:54:10  (  70.16, -47.05)    3.16                50
 02/27/2023   15:44:02   ( -70.03, 120.36) 02/27/2023   15:43:40  ( -70.05, 120.42)    2.72                22