Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 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)
 10/22/2025   14:53:29   ( -70.11, 132.93) 10/22/2025   14:54:30  ( -70.10, 132.88)    1.94                61
 10/22/2025   15:44:14   (  70.02, -59.63) 10/22/2025   15:43:57  (  70.00, -59.62)    2.43                17
 10/22/2025   16:34:45   ( -69.38, 108.63) 10/22/2025   16:33:35  ( -69.44, 107.25)   54.29                70
 10/25/2025   07:10:19   ( -70.07,-111.22) 10/25/2025   07:10:57  ( -70.07,-111.27)    2.05                38
 10/25/2025   08:01:04   (  69.98,  56.22) 10/25/2025   08:00:24  (  69.96,  56.22)    2.43                40
 10/27/2025   22:36:37   (  70.63,-163.63) 10/27/2025   22:37:47  (  70.49,-162.40)   47.97                70
 10/27/2025   23:27:09   ( -70.04,   4.62) 10/27/2025   23:27:23  ( -70.05,   4.60)    1.59                14
 10/28/2025   00:17:54   (  69.96, 172.05) 10/28/2025   00:16:50  (  69.94, 172.08)    2.32                64
 10/30/2025   14:53:17   (  70.14, -47.06) 10/30/2025   14:54:17  (  70.15, -46.99)    2.87                60
 10/30/2025   15:43:58   ( -70.02, 120.44) 10/30/2025   15:43:48  ( -69.99, 120.41)    3.30                10
 10/30/2025   16:34:33   (  69.41, -71.35) 10/30/2025   16:33:23  (  69.43, -72.71)   53.15                70
 11/02/2025   07:10:06   (  70.08,  68.82) 11/02/2025   07:10:42  (  70.11,  68.84)    2.57                36
 11/02/2025   08:00:48   ( -70.01,-123.75) 11/02/2025   08:00:12  ( -70.00,-123.67)    2.95                36