Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 6.  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)
 04/06/2024   15:18:16   (  70.03, -53.49) 04/06/2024   15:19:00  (  70.02, -53.51)    0.73                44
 04/06/2024   16:08:58   ( -69.93, 113.98) 04/06/2024   16:08:30  ( -69.91, 113.97)    1.51                28
 04/09/2024   06:44:42   ( -70.85,-106.33) 04/09/2024   06:45:50  ( -70.72,-104.25)   77.38                68
 04/09/2024   07:35:12   (  70.01,  62.31) 04/09/2024   07:35:28  (  70.01,  62.36)    1.90                16
 04/09/2024   08:25:54   ( -69.91,-130.22) 04/09/2024   08:24:58  ( -69.91,-130.16)    2.29                56
 04/11/2024   23:01:24   ( -70.10,  10.64) 04/11/2024   23:02:29  ( -70.09,  10.71)    2.73                65
 04/11/2024   23:52:07   (  69.94, 178.18) 04/11/2024   23:51:57  (  69.93, 178.12)    3.18                10
 04/12/2024   00:42:43   ( -69.52, -13.88) 04/12/2024   00:41:31  ( -69.60, -14.70)   33.03                72
 04/14/2024   15:18:19   ( -70.04, 126.50) 04/14/2024   15:18:57  ( -70.04, 126.52)    0.73                38
 04/14/2024   16:09:03   (  69.94, -66.04) 04/14/2024   16:08:24  (  69.92, -66.00)    2.01                39
 04/17/2024   06:44:38   (  70.46,  74.29) 04/17/2024   06:45:49  (  70.34,  75.19)   36.36                71
 04/17/2024   07:35:13   ( -69.99,-117.65) 04/17/2024   07:35:24  ( -69.97,-117.71)    3.17                11
 04/17/2024   08:25:57   (  69.89,  49.81) 04/17/2024   08:24:50  (  69.90,  49.85)    1.96                67
 04/19/2024   23:01:26   (  70.05,-169.29) 04/19/2024   23:02:20  (  70.07,-169.30)    2.41                54
 04/19/2024   23:52:09   ( -69.99,  -1.89) 04/19/2024   23:51:50  ( -69.98,  -1.81)    3.55                19
 04/20/2024   00:42:38   (  69.10, 166.72) 04/20/2024   00:41:30  (  69.13, 164.70)   80.07                68