Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 9 29.  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)
 09/30/2023   07:34:13   (  70.74,  61.40) 09/30/2023   07:35:21  (  70.61,  63.36)   73.47                68
 09/30/2023   08:24:41   ( -69.92,-130.00) 09/30/2023   08:25:02  ( -69.90,-130.03)    1.93                21
 09/30/2023   09:15:25   (  69.79,  37.49) 09/30/2023   09:14:29  (  69.79,  37.46)    1.30                56
 10/02/2023   23:50:53   (  69.98, 178.36) 10/02/2023   23:52:04  (  69.99, 178.33)    1.76                71
 10/03/2023   00:41:35   ( -69.89, -14.20) 10/03/2023   00:41:34  ( -69.89, -14.18)    0.89                 1
 10/03/2023   01:32:16   (  69.61, 153.53) 10/03/2023   01:31:03  (  69.67, 153.16)   15.52                73
 10/05/2023   16:07:47   (  69.97, -65.85) 10/05/2023   16:08:35  (  69.99, -65.80)    2.81                48
 10/05/2023   16:58:28   ( -69.83, 101.68) 10/05/2023   16:58:06  ( -69.83, 101.62)    2.32                22
 10/08/2023   08:24:39   (  69.92,  50.00) 10/08/2023   08:25:05  (  69.95,  50.02)    3.45                26
 10/08/2023   09:15:21   ( -69.83,-142.55) 10/08/2023   09:14:35  ( -69.85,-142.48)    3.54                46
 10/10/2023   23:50:54   ( -70.30,  -2.12) 10/10/2023   23:52:05  ( -70.21,  -1.38)   29.99                71
 10/11/2023   00:41:32   (  69.88, 165.83) 10/11/2023   00:41:36  (  69.87, 165.79)    1.70                 4
 10/11/2023   01:32:14   ( -69.78, -26.71) 10/11/2023   01:31:06  ( -69.77, -26.71)    1.06                68