Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 7.  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)
 04/08/2025   06:19:49   ( -70.22, -98.78) 04/08/2025   06:20:54  ( -70.24, -98.76)    2.47                65
 04/08/2025   07:10:33   (  70.14,  68.66) 04/08/2025   07:10:21  (  70.14,  68.74)    2.88                12
 04/08/2025   08:01:08   ( -69.65,-123.30) 04/08/2025   07:59:57  ( -69.69,-124.25)   37.27                71
 04/10/2025   22:36:40   ( -70.21,  17.02) 04/10/2025   22:37:21  ( -70.20,  17.07)    1.63                41
 04/10/2025   23:27:23   (  70.07,-175.46) 04/10/2025   23:26:48  (  70.10,-175.44)    2.75                35
 04/13/2025   14:03:00   (  70.91, -35.64) 04/13/2025   14:04:08  (  70.78, -33.83)   67.52                68
 04/13/2025   14:53:30   ( -70.16, 132.89) 04/13/2025   14:53:47  ( -70.17, 132.91)    1.70                17
 04/13/2025   15:44:13   (  70.03, -59.60) 04/13/2025   15:43:15  (  70.01, -59.68)    3.73                58
 04/16/2025   06:19:37   (  70.25,  81.22) 04/16/2025   06:20:41  (  70.25,  81.29)    2.56                64
 04/16/2025   07:10:19   ( -70.12,-111.27) 04/16/2025   07:10:11  ( -70.14,-111.24)    2.69                 8
 04/16/2025   08:00:55   (  69.62,  56.79) 04/16/2025   07:59:44  (  69.70,  55.79)   39.46                71
 04/18/2025   22:36:26   (  70.18,-162.88) 04/18/2025   22:37:06  (  70.18,-162.93)    1.91                40
 04/18/2025   23:27:09   ( -70.10,   4.55) 04/18/2025   23:26:35  ( -70.12,   4.63)    3.61                34