Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 14.  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)
 08/15/2023   23:50:42   (  70.04, 178.37) 08/15/2023   23:51:44  (  70.04, 178.42)    2.06                62
 08/16/2023   00:41:23   ( -69.90, -14.10) 08/16/2023   00:41:14  ( -69.92, -14.11)    2.14                 9
 08/16/2023   01:31:59   (  69.37, 154.00) 08/16/2023   01:30:48  (  69.44, 152.87)   44.72                71
 08/18/2023   16:07:32   (  69.98, -65.74) 08/18/2023   16:08:13  (  70.00, -65.74)    2.66                41
 08/18/2023   16:58:14   ( -69.89, 101.71) 08/18/2023   16:57:43  ( -69.89, 101.73)    0.87                31
 08/21/2023   07:33:55   ( -70.92,-118.76) 08/21/2023   07:35:01  ( -70.81,-116.31)   90.19                66
 08/21/2023   08:24:22   (  69.92,  50.13) 08/21/2023   08:24:42  (  69.94,  50.05)    3.51                20
 08/21/2023   09:15:04   ( -69.83,-142.42) 08/21/2023   09:14:12  ( -69.83,-142.47)    1.87                52
 08/23/2023   23:50:29   ( -70.08,  -1.64) 08/23/2023   23:51:41  ( -70.07,  -1.51)    4.81                72
 08/24/2023   00:41:12   (  69.92, 165.91) 08/24/2023   00:41:09  (  69.90, 165.90)    1.97                 3
 08/24/2023   01:31:53   ( -69.77, -26.55) 08/24/2023   01:30:39  ( -69.80, -26.62)    3.53                74
 08/26/2023   16:07:19   ( -70.03, 114.22) 08/26/2023   16:08:09  ( -70.01, 114.30)    3.70                50
 08/26/2023   16:58:02   (  69.87, -78.23) 08/26/2023   16:57:36  (  69.90, -78.21)    2.78                26