Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 26.  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)
 10/26/2023   23:51:00   ( -70.21,  -2.02) 10/26/2023   23:52:11  ( -70.13,  -1.50)   21.42                71
 10/27/2023   00:41:40   (  69.87, 165.79) 10/27/2023   00:41:41  (  69.86, 165.77)    1.45                 1
 10/27/2023   01:32:21   ( -69.73, -26.68) 10/27/2023   01:31:11  ( -69.75, -26.76)    3.65                70
 10/29/2023   16:07:55   ( -69.95, 114.12) 10/29/2023   16:08:42  ( -69.93, 114.11)    1.86                47
 10/29/2023   16:58:39   (  69.83, -78.39) 10/29/2023   16:58:09  (  69.82, -78.39)    0.48                30
 11/01/2023   07:34:21   (  70.53,  61.64) 11/01/2023   07:35:30  (  70.47,  63.14)   56.10                69
 11/01/2023   08:24:53   ( -69.91,-130.07) 11/01/2023   08:25:08  ( -69.92,-130.01)    2.55                15
 11/01/2023   09:15:37   (  69.79,  37.41) 11/01/2023   09:14:35  (  69.81,  37.48)    3.36                62
 11/03/2023   23:51:09   (  69.93, 178.34) 11/03/2023   23:52:06  (  69.94, 178.27)    3.02                57
 11/04/2023   00:41:51   ( -69.82, -14.19) 11/04/2023   00:41:36  ( -69.83, -14.25)    2.47                15
 11/04/2023   01:32:22   (  69.02, 154.27) 11/04/2023   01:31:14  (  69.11, 152.43)   73.73                68
 11/06/2023   16:08:08   (  69.91, -65.88) 11/06/2023   16:08:32  (  69.92, -65.86)    1.63                24
 11/06/2023   16:58:50   ( -69.80, 101.60) 11/06/2023   16:58:02  ( -69.81, 101.63)    1.88                48