Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 3 20.  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)
 03/20/2025   14:03:17   ( -70.37, 145.15) 03/20/2025   14:04:28  ( -70.31, 145.49)   14.43                71
 03/20/2025   14:53:58   (  70.11, -47.13) 03/20/2025   14:53:57  (  70.10, -47.17)    1.84                 1
 03/20/2025   15:44:40   ( -70.01, 120.33) 03/20/2025   15:43:27  ( -69.99, 120.30)    2.84                73
 03/23/2025   06:20:07   ( -70.19, -98.79) 03/23/2025   06:21:00  ( -70.19, -98.82)    1.10                53
 03/23/2025   07:10:51   (  70.09,  68.68) 03/23/2025   07:10:27  (  70.08,  68.67)    0.70                24
 03/23/2025   08:01:18   ( -69.19,-122.70) 03/23/2025   08:00:10  ( -69.26,-124.82)   83.74                68
 03/25/2025   22:36:59   ( -70.19,  16.99) 03/25/2025   22:37:28  ( -70.16,  17.02)    2.90                29
 03/25/2025   23:27:42   (  70.04,-175.47) 03/25/2025   23:26:55  (  70.05,-175.50)    1.61                47
 03/28/2025   14:03:12   (  70.42, -34.91) 03/28/2025   14:04:24  (  70.33, -34.49)   18.78                72
 03/28/2025   14:53:51   ( -70.15, 132.83) 03/28/2025   14:53:56  ( -70.12, 132.84)    3.56                 5
 03/28/2025   15:44:34   (  70.01, -59.65) 03/28/2025   15:43:23  (  70.00, -59.68)    1.37                71
 03/31/2025   06:20:00   (  70.20,  81.21) 03/31/2025   06:20:52  (  70.22,  81.24)    1.96                52
 03/31/2025   07:10:42   ( -70.08,-111.29) 03/31/2025   07:10:22  ( -70.11,-111.28)    3.62                20
 03/31/2025   08:01:10   (  69.15,  57.38) 03/31/2025   08:00:03  (  69.22,  55.15)   88.53                67
 04/02/2025   22:36:51   (  70.16,-162.94) 04/02/2025   22:37:18  (  70.14,-162.98)    2.35                27
 04/02/2025   23:27:33   ( -70.04,   4.56) 04/02/2025   23:26:48  ( -70.04,   4.51)    2.17                45