Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2025   06:45:10   ( -70.44,-105.49) 10/21/2025   06:46:21  ( -70.33,-104.74)   30.66                71
 10/21/2025   07:35:49   (  70.03,  62.45) 10/21/2025   07:35:52  (  70.01,  62.44)    3.13                 3
 10/21/2025   08:26:30   ( -69.93,-130.06) 10/21/2025   08:25:22  ( -69.90,-130.08)    3.50                68
 10/23/2025   23:01:54   ( -70.08,  10.87) 10/23/2025   23:02:53  ( -70.10,  10.82)    3.18                59
 10/23/2025   23:52:39   (  69.99, 178.31) 10/23/2025   23:52:20  (  69.99, 178.31)    0.22                19
 10/24/2025   00:43:09   ( -69.30, -13.35) 10/24/2025   00:42:00  ( -69.33, -14.96)   63.10                69
 10/26/2025   15:18:44   ( -70.04, 126.72) 10/26/2025   15:19:21  ( -70.05, 126.64)    3.45                37
 10/26/2025   16:09:29   (  69.96, -65.84) 10/26/2025   16:08:48  (  69.94, -65.87)    1.98                41
 10/29/2025   06:45:01   (  70.60,  74.31) 10/29/2025   06:46:11  (  70.46,  75.49)   46.64                70
 10/29/2025   07:35:33   ( -70.01,-117.44) 10/29/2025   07:35:47  ( -70.03,-117.50)    3.06                14
 10/29/2025   08:26:18   (  69.93,  49.99) 10/29/2025   08:25:14  (  69.91,  49.98)    2.31                64
 10/31/2025   23:01:42   (  70.12,-169.13) 10/31/2025   23:02:43  (  70.12,-169.11)    0.97                61
 10/31/2025   23:52:23   ( -69.99,  -1.62) 10/31/2025   23:52:13  ( -70.02,  -1.62)    3.31                10
 11/01/2025   00:42:58   (  69.39, 166.58) 11/01/2025   00:41:48  (  69.46, 165.26)   52.39                70