Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 12 4.  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)
 12/04/2025   06:20:18   ( -70.36, -99.11) 12/04/2025   06:21:30  ( -70.27, -98.65)   19.69                72
 12/04/2025   07:10:58   (  70.05,  68.68) 12/04/2025   07:10:59  (  70.06,  68.69)    1.55                 1
 12/04/2025   08:01:40   ( -69.94,-123.84) 12/04/2025   08:00:29  ( -69.95,-123.84)    0.89                71
 12/06/2025   22:37:13   ( -70.11,  17.04) 12/06/2025   22:37:59  ( -70.12,  17.02)    1.74                46
 12/06/2025   23:27:57   (  70.01,-175.51) 12/06/2025   23:27:26  (  70.02,-175.48)    1.08                31
 12/09/2025   14:03:39   (  70.67, -35.42) 12/09/2025   14:04:48  (  70.59, -34.03)   51.95                69
 12/09/2025   14:54:12   ( -70.08, 132.84) 12/09/2025   14:54:25  ( -70.10, 132.88)    2.32                13
 12/09/2025   15:44:55   (  69.94, -59.63) 12/09/2025   15:43:53  (  69.93, -59.71)    2.96                62
 12/12/2025   06:20:28   (  70.14,  81.19) 12/12/2025   06:21:21  (  70.13,  81.20)    0.17                53
 12/12/2025   07:11:10   ( -70.01,-111.30) 12/12/2025   07:10:51  ( -70.03,-111.33)    2.16                19
 12/12/2025   08:01:39   (  69.13,  57.30) 12/12/2025   08:00:32  (  69.14,  55.12)   86.37                67
 12/14/2025   21:46:58   ( -71.05,  28.17) 12/14/2025   21:48:04  ( -70.95,  30.67)   91.35                66
 12/14/2025   22:37:25   (  70.08,-162.96) 12/14/2025   22:37:45  (  70.07,-162.99)    1.25                20
 12/14/2025   23:28:07   ( -69.95,   4.55) 12/14/2025   23:27:15  ( -69.97,   4.49)    2.97                52
 12/17/2025   14:03:40   ( -70.17, 145.36) 12/17/2025   14:04:42  ( -70.14, 145.37)    2.36                62
 12/17/2025   14:54:23   (  70.04, -47.14) 12/17/2025   14:54:09  (  70.03, -47.15)    1.35                14
 12/17/2025   15:44:57   ( -69.48, 121.01) 12/17/2025   15:43:46  ( -69.54, 119.80)   47.24                71