Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 21.  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   (  70.16, -47.07) 04/21/2025   14:53:41  (  70.17, -47.09)    1.39                25
 04/21/2025   15:43:58   ( -70.05, 120.42) 04/21/2025   15:43:11  ( -70.05, 120.37)    1.95                47
 04/24/2025   06:19:26   ( -70.45, -99.04) 04/24/2025   06:20:37  ( -70.38, -98.54)   20.22                71
 04/24/2025   07:10:06   (  70.16,  68.72) 04/24/2025   07:10:06  (  70.17,  68.80)    3.19                 0
 04/24/2025   08:00:48   ( -70.04,-123.78) 04/24/2025   07:59:36  ( -70.05,-123.73)    2.21                72
 04/26/2025   22:36:12   ( -70.25,  17.07) 04/26/2025   22:37:04  ( -70.24,  17.15)    3.10                52
 04/26/2025   23:26:55   (  70.11,-175.42) 04/26/2025   23:26:31  (  70.14,-175.36)    3.13                24
 04/27/2025   00:17:22   ( -69.20,  -6.76) 04/27/2025   00:16:15  ( -69.25,  -8.93)   85.74                67
 04/29/2025   14:52:59   ( -70.16, 132.99) 04/29/2025   14:53:28  ( -70.17, 132.94)    2.26                29
 04/29/2025   15:43:43   (  70.08, -59.57) 04/29/2025   15:42:55  (  70.06, -59.57)    2.19                48
 05/02/2025   06:19:09   (  70.41,  81.08) 05/02/2025   06:20:20  (  70.34,  81.45)   16.11                71
 05/02/2025   07:09:48   ( -70.14,-111.18) 05/02/2025   07:09:52  ( -70.12,-111.24)    3.22                 4
 05/02/2025   08:00:31   (  70.00,  56.34) 05/02/2025   07:59:19  (  70.00,  56.25)    3.40                72
 05/04/2025   22:35:55   (  70.24,-162.86) 05/04/2025   22:36:44  (  70.25,-162.79)    2.79                49
 05/04/2025   23:26:37   ( -70.13,   4.64) 05/04/2025   23:26:14  ( -70.14,   4.69)    2.35                23