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   ( -71.07, 137.54) 04/22/2024   14:28:59  ( -70.94, 140.24)   99.00                66
 04/22/2024   15:18:19   (  70.02, -53.46) 04/22/2024   15:18:41  (  70.01, -53.48)    1.23                22
 04/22/2024   16:09:01   ( -69.92, 114.00) 04/22/2024   16:08:11  ( -69.90, 113.99)    2.93                50
 04/25/2024   06:44:29   ( -70.10,-105.12) 04/25/2024   06:45:36  ( -70.12,-105.08)    2.12                67
 04/25/2024   07:35:13   (  69.99,  62.35) 04/25/2024   07:35:03  (  70.00,  62.40)    2.04                10
 04/25/2024   08:25:49   ( -69.58,-129.71) 04/25/2024   08:24:37  ( -69.67,-130.42)   29.12                72
 04/27/2024   23:01:22   ( -70.04,  10.75) 04/27/2024   23:01:58  ( -70.04,  10.72)    1.67                36
 04/27/2024   23:52:06   (  69.94, 178.22) 04/27/2024   23:51:25  (  69.92, 178.20)    2.74                41
 04/30/2024   14:27:35   (  70.22, -41.05) 04/30/2024   14:28:47  (  70.15, -40.83)   10.64                72
 04/30/2024   15:18:15   ( -70.01, 126.59) 04/30/2024   15:18:18  ( -69.99, 126.57)    2.25                 3
 04/30/2024   16:08:58   (  69.85, -65.87) 04/30/2024   16:07:45  (  69.87, -65.96)    3.67                73
 05/03/2024   06:44:25   (  70.10,  74.92) 05/03/2024   06:45:05  (  70.09,  75.00)    3.17                40
 05/03/2024   07:35:06   ( -69.94,-117.53) 05/03/2024   07:34:36  ( -69.93,-117.60)    3.33                30