Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 27.  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)
 07/27/2025   22:12:03   ( -70.12,  23.26) 07/27/2025   22:12:58  ( -70.10,  23.21)    3.40                55
 07/27/2025   23:02:47   (  70.02,-169.27) 07/27/2025   23:02:25  (  69.99,-169.29)    3.36                22
 07/27/2025   23:53:15   ( -69.17,  -0.72) 07/27/2025   23:52:07  ( -69.22,  -2.70)   78.41                68
 07/30/2025   14:28:58   ( -70.09, 139.09) 07/30/2025   14:29:28  ( -70.06, 139.05)    3.29                30
 07/30/2025   15:19:42   (  69.99, -53.46) 07/30/2025   15:18:54  (  70.01, -53.38)    3.27                48
 08/02/2025   05:55:14   (  70.33,  87.16) 08/02/2025   05:56:25  (  70.27,  87.60)   17.93                71
 08/02/2025   06:45:53   ( -70.06,-105.10) 08/02/2025   06:45:57  ( -70.06,-105.07)    1.02                 4
 08/02/2025   07:36:36   (  69.91,  62.43) 08/02/2025   07:35:24  (  69.95,  62.42)    3.51                72
 08/04/2025   22:12:04   (  70.10,-156.71) 08/04/2025   22:12:56  (  70.08,-156.78)    3.40                52
 08/04/2025   23:02:47   ( -70.03,  10.71) 08/04/2025   23:02:25  ( -70.04,  10.78)    2.85                22
 08/04/2025   23:53:14   (  69.04, 179.45) 08/04/2025   23:52:07  (  69.09, 177.15)   91.58                67
 08/07/2025   14:28:59   (  70.09, -40.92) 08/07/2025   14:29:24  (  70.09, -40.88)    1.64                25
 08/07/2025   15:19:41   ( -69.96, 126.59) 08/07/2025   15:18:55  ( -69.94, 126.53)    2.98                46