Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 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)
 04/21/2025   14:53:16   (  70.17, -47.08) 04/21/2025   14:53:41  (  70.16, -47.10)    1.06                25
 04/21/2025   15:43:58   ( -70.05, 120.41) 04/21/2025   15:43:11  ( -70.04, 120.36)    2.21                47
 04/24/2025   06:19:26   ( -70.46, -99.05) 04/24/2025   06:20:37  ( -70.38, -98.55)   20.61                71
 04/24/2025   07:10:06   (  70.16,  68.72) 04/24/2025   07:10:06  (  70.16,  68.79)    2.69                 0
 04/24/2025   08:00:48   ( -70.05,-123.79) 04/24/2025   07:59:36  ( -70.05,-123.74)    1.68                72
 04/26/2025   22:36:12   ( -70.25,  17.06) 04/26/2025   22:37:04  ( -70.23,  17.13)    3.46                52
 04/26/2025   23:26:55   (  70.12,-175.42) 04/26/2025   23:26:31  (  70.12,-175.37)    1.91                24
 04/27/2025   00:17:22   ( -69.21,  -6.77) 04/27/2025   00:16:15  ( -69.24,  -8.95)   85.97                67
 04/29/2025   14:52:59   ( -70.16, 132.99) 04/29/2025   14:53:28  ( -70.16, 132.93)    2.51                29
 04/29/2025   15:43:43   (  70.08, -59.58) 04/29/2025   15:42:54  (  70.10, -59.51)    3.28                49
 05/02/2025   06:19:09   (  70.42,  81.07) 05/02/2025   06:20:19  (  70.38,  81.51)   16.67                70
 05/02/2025   07:09:48   ( -70.14,-111.18) 05/02/2025   07:09:51  ( -70.16,-111.18)    1.96                 3
 05/02/2025   08:00:31   (  70.01,  56.33) 05/02/2025   07:59:18  (  70.04,  56.30)    4.11                73