Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 28.  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)
 08/29/2023   07:34:07   (  70.68,  61.55) 08/29/2023   07:35:15  (  70.60,  63.34)   66.68                68
 08/29/2023   08:24:36   ( -69.92,-129.94) 08/29/2023   08:24:55  ( -69.94,-129.99)    2.90                19
 08/29/2023   09:15:21   (  69.84,  37.48) 08/29/2023   09:14:22  (  69.84,  37.51)    1.48                59
 08/31/2023   23:50:50   (  70.02, 178.35) 08/31/2023   23:51:55  (  70.01, 178.36)    1.34                65
 09/01/2023   00:41:31   ( -69.88, -14.13) 09/01/2023   00:41:25  ( -69.90, -14.17)    2.19                 6
 09/01/2023   01:32:09   (  69.44, 153.83) 09/01/2023   01:30:58  (  69.46, 152.88)   37.15                71
 09/03/2023   16:07:46   (  69.99, -65.85) 09/03/2023   16:08:25  (  70.00, -65.78)    2.71                39
 09/03/2023   16:58:27   ( -69.86, 101.68) 09/03/2023   16:57:56  ( -69.84, 101.63)    2.94                31
 09/06/2023   07:34:10   ( -70.72,-118.54) 09/06/2023   07:35:18  ( -70.62,-116.63)   71.33                68
 09/06/2023   08:24:41   (  69.92,  50.02) 09/06/2023   08:24:56  (  69.91,  49.98)    2.39                15
 09/06/2023   09:15:23   ( -69.84,-142.53) 09/06/2023   09:14:26  ( -69.80,-142.53)    3.48                57
 09/08/2023   23:50:53   ( -70.03,  -1.68) 09/08/2023   23:51:58  ( -70.02,  -1.62)    2.51                65
 09/09/2023   00:41:37   (  69.91, 165.80) 09/09/2023   00:41:25  (  69.90, 165.86)    2.41                12
 09/09/2023   01:32:12   ( -69.45, -26.21) 09/09/2023   01:31:00  ( -69.53, -27.02)   32.97                72