Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 10.  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)
 08/13/2023   07:34:00   (  70.50,  61.87) 08/13/2023   07:35:10  (  70.37,  63.01)   45.06                70
 08/13/2023   08:24:33   ( -69.94,-129.94) 08/13/2023   08:24:46  ( -69.92,-130.00)    3.21                13
 08/13/2023   09:15:17   (  69.83,  37.54) 08/13/2023   09:14:13  (  69.82,  37.51)    1.31                64
 08/15/2023   23:50:42   (  70.01, 178.43) 08/15/2023   23:51:45  (  70.02, 178.40)    2.11                63
 08/16/2023   00:41:24   ( -69.92, -14.12) 08/16/2023   00:41:15  ( -69.91, -14.13)    0.73                 9
 08/16/2023   01:31:59   (  69.38, 153.97) 08/16/2023   01:30:48  (  69.42, 152.85)   44.14                71
 08/18/2023   16:07:32   (  69.99, -65.77) 08/18/2023   16:08:13  (  69.99, -65.76)    0.65                41
 08/18/2023   16:58:14   ( -69.90, 101.69) 08/18/2023   16:57:43  ( -69.88, 101.72)    2.76                31
 08/21/2023   07:33:54   ( -70.88,-118.69) 08/21/2023   07:35:01  ( -70.80,-116.32)   86.87                67
 08/21/2023   08:24:22   (  69.93,  50.11) 08/21/2023   08:24:42  (  69.92,  50.04)    2.84                20
 08/21/2023   09:15:04   ( -69.84,-142.43) 08/21/2023   09:14:12  ( -69.82,-142.48)    2.65                52
 08/23/2023   23:50:30   ( -70.09,  -1.65) 08/23/2023   23:51:42  ( -70.06,  -1.52)    5.46                72
 08/24/2023   00:41:13   (  69.93, 165.90) 08/24/2023   00:41:09  (  69.95, 165.96)    3.30                 4
 08/24/2023   01:31:53   ( -69.73, -26.49) 08/24/2023   01:30:41  ( -69.74, -26.70)    8.32                72