Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 30.  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)
 10/31/2025   23:01:42   (  70.11,-169.13) 10/31/2025   23:02:47  (  70.14,-169.11)    2.51                65
 10/31/2025   23:52:23   ( -70.00,  -1.64) 10/31/2025   23:52:17  ( -70.03,  -1.63)    3.06                 6
 11/01/2025   00:43:01   (  69.54, 166.35) 11/01/2025   00:41:50  (  69.59, 165.41)   36.92                71
 11/03/2025   15:18:32   (  70.11, -53.32) 11/03/2025   15:19:19  (  70.10, -53.29)    1.33                47
 11/03/2025   16:09:13   ( -69.99, 114.18) 11/03/2025   16:08:49  ( -70.00, 114.20)    1.42                24
 11/06/2025   07:35:21   (  70.06,  62.55) 11/06/2025   07:35:51  (  70.04,  62.50)    2.74                30
 11/06/2025   08:26:02   ( -69.93,-129.94) 11/06/2025   08:25:21  ( -69.94,-130.01)    3.06                41
 11/08/2025   23:01:36   ( -70.71,  10.01) 11/08/2025   23:02:45  ( -70.61,  11.55)   57.92                69
 11/08/2025   23:52:10   (  70.06, 178.33) 11/08/2025   23:52:20  (  70.06, 178.40)    2.48                10
 11/09/2025   00:42:51   ( -69.93, -14.15) 11/09/2025   00:41:50  ( -69.96, -14.11)    2.99                61
 11/11/2025   15:18:15   ( -70.14, 126.70) 11/11/2025   15:19:23  ( -70.16, 126.77)    3.27                68
 11/11/2025   16:08:59   (  70.03, -65.82) 11/11/2025   16:08:50  (  70.04, -65.75)    3.02                 9
 11/11/2025   16:59:36   ( -69.68, 102.02) 11/11/2025   16:58:24  ( -69.73, 101.44)   22.96                72