Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 20.  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)
 04/22/2024   14:27:53   ( -71.06, 137.56) 04/22/2024   14:28:59  ( -70.96, 140.27)   98.92                66
 04/22/2024   15:18:19   (  70.01, -53.45) 04/22/2024   15:18:41  (  70.03, -53.46)    2.50                22
 04/22/2024   16:09:01   ( -69.91, 114.02) 04/22/2024   16:08:11  ( -69.92, 114.02)    0.68                50
 04/25/2024   06:44:29   ( -70.09,-105.11) 04/25/2024   06:45:37  ( -70.09,-105.12)    0.81                68
 04/25/2024   07:35:13   (  69.99,  62.36) 04/25/2024   07:35:04  (  69.97,  62.37)    1.76                 9
 04/25/2024   08:25:50   ( -69.63,-129.78) 04/25/2024   08:24:38  ( -69.64,-130.46)   26.34                72
 04/27/2024   23:01:22   ( -70.04,  10.75) 04/27/2024   23:01:58  ( -70.07,  10.77)    3.44                36
 04/27/2024   23:52:06   (  69.94, 178.22) 04/27/2024   23:51:25  (  69.96, 178.25)    2.02                41
 04/30/2024   14:27:35   (  70.28, -41.14) 04/30/2024   14:28:46  (  70.21, -40.76)   16.19                71
 04/30/2024   15:18:14   ( -70.02, 126.58) 04/30/2024   15:18:18  ( -69.99, 126.56)    3.08                 4
 04/30/2024   16:08:57   (  69.86, -65.88) 04/30/2024   16:07:45  (  69.87, -65.96)    3.22                72
 05/03/2024   06:44:24   (  70.06,  74.98) 05/03/2024   06:45:07  (  70.05,  74.94)    2.09                43
 05/03/2024   07:35:06   ( -69.96,-117.55) 05/03/2024   07:34:37  ( -69.94,-117.58)    2.24                29