Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 9 1.  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)
 09/03/2023   16:07:46   (  70.01, -65.87) 09/03/2023   16:08:25  (  69.99, -65.79)    3.57                39
 09/03/2023   16:58:27   ( -69.87, 101.65) 09/03/2023   16:57:55  ( -69.88, 101.69)    1.28                32
 09/06/2023   07:34:10   ( -70.74,-118.57) 09/06/2023   07:35:18  ( -70.61,-116.65)   72.17                68
 09/06/2023   08:24:41   (  69.94,  50.00) 09/06/2023   08:24:55  (  69.95,  50.04)    2.40                14
 09/06/2023   09:15:22   ( -69.80,-142.48) 09/06/2023   09:14:26  ( -69.79,-142.55)    2.98                56
 09/08/2023   23:50:52   ( -69.99,  -1.63) 09/08/2023   23:51:58  ( -70.01,  -1.64)    1.69                66
 09/09/2023   00:41:36   (  69.87, 165.86) 09/09/2023   00:41:25  (  69.90, 165.85)    2.71                11
 09/09/2023   01:32:12   ( -69.47, -26.23) 09/09/2023   01:31:00  ( -69.52, -27.04)   31.99                72
 09/11/2023   16:07:48   ( -69.99, 114.15) 09/11/2023   16:08:27  ( -69.99, 114.21)    2.65                39
 09/11/2023   16:58:32   (  69.87, -78.37) 09/11/2023   16:57:54  (  69.87, -78.30)    2.53                38
 09/14/2023   07:34:09   (  70.50,  61.79) 09/14/2023   07:35:19  (  70.37,  63.02)   47.91                70
 09/14/2023   08:24:42   ( -69.93,-130.01) 09/14/2023   08:24:55  ( -69.94,-129.96)    2.03                13
 09/14/2023   09:15:26   (  69.82,  37.47) 09/14/2023   09:14:22  (  69.82,  37.52)    1.83                64