Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 1 18.  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)
 01/18/2025   06:20:22   ( -70.22, -98.79) 01/18/2025   06:21:22  ( -70.22, -98.76)    1.11                60
 01/18/2025   07:11:06   (  70.10,  68.71) 01/18/2025   07:10:49  (  70.12,  68.75)    2.91                17
 01/18/2025   08:01:38   ( -69.49,-123.08) 01/18/2025   08:00:28  ( -69.51,-124.47)   54.09                70
 01/20/2025   22:37:08   ( -70.16,  17.09) 01/20/2025   22:37:49  ( -70.17,  17.06)    1.28                41
 01/20/2025   23:27:52   (  70.04,-175.41) 01/20/2025   23:27:16  (  70.06,-175.44)    2.62                36
 01/23/2025   14:03:27   (  70.93, -35.66) 01/23/2025   14:04:35  (  70.85, -33.68)   73.03                68
 01/23/2025   14:53:55   ( -70.12, 132.95) 01/23/2025   14:54:16  ( -70.13, 132.90)    2.17                21
 01/23/2025   15:44:39   (  70.00, -59.56) 01/23/2025   15:43:43  (  70.02, -59.61)    3.12                56
 01/26/2025   06:20:01   (  70.22,  81.28) 01/26/2025   06:21:12  (  70.22,  81.28)    0.58                71
 01/26/2025   07:10:42   ( -70.10,-111.21) 01/26/2025   07:10:42  ( -70.11,-111.24)    1.79                 0
 01/26/2025   08:01:23   (  69.82,  56.52) 01/26/2025   08:00:11  (  69.89,  56.09)   18.28                72
 01/28/2025   22:36:48   (  70.21,-162.90) 01/28/2025   22:37:37  (  70.21,-162.84)    2.22                49
 01/28/2025   23:27:29   ( -70.08,   4.61) 01/28/2025   23:27:07  ( -70.10,   4.64)    1.92                22
 01/29/2025   00:17:56   (  69.06, 173.41) 01/29/2025   00:16:50  (  69.10, 170.93)   98.60                66
 01/31/2025   14:53:33   (  70.15, -47.01) 01/31/2025   14:54:01  (  70.15, -47.02)    0.26                28
 01/31/2025   15:44:14   ( -70.03, 120.50) 01/31/2025   15:43:31  ( -70.05, 120.46)    2.50                43