Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 9.  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)
 06/10/2023   06:44:07   ( -70.75,-105.96) 06/10/2023   06:45:16  ( -70.68,-104.32)   60.66                69
 06/10/2023   07:34:40   (  70.06,  62.45) 06/10/2023   07:34:53  (  70.03,  62.37)    3.62                13
 06/10/2023   08:25:22   ( -69.97,-130.11) 06/10/2023   08:24:22  ( -69.97,-130.08)    1.20                60
 06/12/2023   23:00:50   ( -70.13,  10.79) 06/12/2023   23:01:53  ( -70.13,  10.74)    2.07                63
 06/12/2023   23:51:34   (  70.02, 178.27) 06/12/2023   23:51:20  (  70.02, 178.23)    1.55                14
 06/13/2023   00:42:07   ( -69.45, -13.58) 06/13/2023   00:40:57  ( -69.52, -14.82)   48.95                70
 06/15/2023   15:17:44   ( -70.10, 126.61) 06/15/2023   15:18:20  ( -70.09, 126.57)    1.87                36
 06/15/2023   16:08:28   (  69.99, -65.91) 06/15/2023   16:07:47  (  69.98, -65.94)    1.42                41
 06/18/2023   06:44:02   (  70.48,  74.46) 06/18/2023   06:45:13  (  70.35,  75.20)   31.05                71
 06/18/2023   07:34:38   ( -70.07,-117.57) 06/18/2023   07:34:46  ( -70.08,-117.55)    1.63                 8
 06/18/2023   08:25:22   (  69.96,  49.90) 06/18/2023   08:24:13  (  69.97,  49.93)    1.45                69
 06/20/2023   23:00:49   (  70.15,-169.24) 06/20/2023   23:01:41  (  70.15,-169.20)    1.80                52
 06/20/2023   23:51:31   ( -70.05,  -1.77) 06/20/2023   23:51:11  ( -70.05,  -1.71)    2.29                20