Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 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)
 11/10/2025   07:10:10   ( -70.12,-111.24) 11/10/2025   07:11:02  ( -70.13,-111.21)    2.02                52
 11/10/2025   08:00:54   (  69.98,  56.28) 11/10/2025   08:00:30  (  69.97,  56.20)    2.82                24
 11/10/2025   08:51:20   ( -69.06,-135.07) 11/10/2025   08:50:13  ( -69.15,-137.28)   88.24                67
 11/12/2025   22:36:42   (  70.85,-163.99) 11/12/2025   22:37:50  (  70.76,-162.04)   72.26                68
 11/12/2025   23:27:10   ( -70.04,   4.63) 11/12/2025   23:27:31  ( -70.05,   4.55)    3.21                21
 11/13/2025   00:17:55   (  69.96, 172.06) 11/13/2025   00:16:58  (  69.94, 172.04)    2.11                57
 11/15/2025   14:53:30   (  70.16, -47.13) 11/15/2025   14:54:28  (  70.14, -47.06)    3.25                58
 11/15/2025   15:44:11   ( -70.02, 120.40) 11/15/2025   15:43:58  ( -70.04, 120.43)    2.29                13
 11/15/2025   16:34:44   (  69.31, -71.24) 11/15/2025   16:33:35  (  69.37, -72.84)   63.03                69
 11/18/2025   07:10:29   (  70.11,  68.70) 11/18/2025   07:10:54  (  70.10,  68.77)    2.75                25
 11/18/2025   08:01:10   ( -69.96,-123.75) 11/18/2025   08:00:25  ( -69.94,-123.82)    3.20                45
 11/20/2025   22:36:44   ( -70.12,  17.12) 11/20/2025   22:37:54  ( -70.14,  17.08)    2.58                70
 11/20/2025   23:27:28   (  70.01,-175.40) 11/20/2025   23:27:21  (  70.02,-175.44)    2.02                 7
 11/21/2025   00:18:06   ( -69.70,  -7.61) 11/21/2025   00:16:54  ( -69.75,  -8.18)   22.81                72