Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 5 10.  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)
 05/10/2025   06:19:43   ( -70.17, -98.72) 05/10/2025   06:20:41  ( -70.16, -98.78)    2.77                58
 05/10/2025   07:10:27   (  70.06,  68.77) 05/10/2025   07:10:08  (  70.06,  68.72)    1.90                19
 05/10/2025   08:00:57   ( -69.33,-122.84) 05/10/2025   07:59:48  ( -69.40,-124.56)   67.68                69
 05/12/2025   22:36:41   ( -70.16,  17.06) 05/12/2025   22:37:11  ( -70.18,  17.12)    2.81                30
 05/12/2025   23:27:25   (  70.04,-175.45) 05/12/2025   23:26:39  (  70.02,-175.46)    2.71                46
 05/15/2025   14:02:59   (  70.35, -34.79) 05/15/2025   14:04:11  (  70.28, -34.48)   14.11                72
 05/15/2025   14:53:38   ( -70.10, 132.91) 05/15/2025   14:53:42  ( -70.11, 132.91)    1.53                 4
 05/15/2025   15:44:22   (  69.98, -59.60) 05/15/2025   15:43:09  (  70.01, -59.59)    2.95                73
 05/18/2025   06:19:54   (  70.19,  81.21) 05/18/2025   06:20:42  (  70.19,  81.28)    2.33                48
 05/18/2025   07:10:35   ( -70.05,-111.25) 05/18/2025   07:10:13  ( -70.03,-111.32)    3.16                22
 05/20/2025   21:46:23   ( -71.15,  28.10) 05/20/2025   21:47:29  ( -71.07,  30.84)   98.95                66
 05/20/2025   22:36:50   (  70.14,-162.95) 05/20/2025   22:37:11  (  70.14,-162.91)    1.50                21
 05/20/2025   23:27:32   ( -70.05,   4.50) 05/20/2025   23:26:41  ( -70.04,   4.57)    3.23                51
 05/23/2025   14:03:02   ( -70.17, 145.46) 05/23/2025   14:04:14  ( -70.18, 145.39)    3.10                72
 05/23/2025   14:53:47   (  70.10, -47.13) 05/23/2025   14:53:41  (  70.07, -47.13)    3.41                 6
 05/23/2025   15:44:26   ( -69.85, 120.56) 05/23/2025   15:43:12  ( -69.91, 120.28)   12.46                74