Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 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)
 04/08/2025   06:19:49   ( -70.24, -98.81) 04/08/2025   06:20:54  ( -70.22, -98.79)    1.86                65
 04/08/2025   07:10:32   (  70.10,  68.71) 04/08/2025   07:10:21  (  70.12,  68.71)    2.53                11
 04/08/2025   08:01:08   ( -69.67,-123.32) 04/08/2025   07:59:56  ( -69.73,-124.20)   34.59                72
 04/10/2025   22:36:39   ( -70.17,  17.08) 04/10/2025   22:37:21  ( -70.19,  17.05)    2.61                42
 04/10/2025   23:27:23   (  70.09,-175.49) 04/10/2025   23:26:48  (  70.09,-175.45)    1.28                35
 04/13/2025   14:03:00   (  70.92, -35.66) 04/13/2025   14:04:08  (  70.78, -33.83)   68.72                68
 04/13/2025   14:53:30   ( -70.17, 132.87) 04/13/2025   14:53:47  ( -70.17, 132.91)    1.75                17
 04/13/2025   15:44:13   (  70.04, -59.62) 04/13/2025   15:43:14  (  70.07, -59.60)    3.04                59
 04/16/2025   06:19:37   (  70.21,  81.29) 04/16/2025   06:20:43  (  70.22,  81.24)    2.68                66
 04/16/2025   07:10:20   ( -70.13,-111.29) 04/16/2025   07:10:13  ( -70.11,-111.29)    2.29                 7
 04/16/2025   08:00:56   (  69.63,  56.77) 04/16/2025   07:59:45  (  69.73,  55.82)   38.11                71
 04/18/2025   22:36:26   (  70.18,-162.89) 04/18/2025   22:37:07  (  70.17,-162.94)    2.53                41
 04/18/2025   23:27:09   ( -70.11,   4.54) 04/18/2025   23:26:36  ( -70.11,   4.61)    2.78                33
 04/21/2025   14:02:45   ( -70.92, 144.40) 04/21/2025   14:03:53  ( -70.84, 146.30)   69.87                68
 04/21/2025   14:53:16   (  70.17, -47.08) 04/21/2025   14:53:30  (  70.18, -47.03)    2.31                14
 04/21/2025   15:43:58   ( -70.04, 120.43) 04/21/2025   15:43:01  ( -70.02, 120.37)    3.46                57