Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 25.  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)
 07/25/2025   05:55:14   ( -70.44, -93.00) 07/25/2025   05:56:25  ( -70.32, -92.35)   27.50                71
 07/25/2025   06:45:53   (  70.07,  74.88) 07/25/2025   06:45:55  (  70.05,  74.91)    2.22                 2
 07/25/2025   07:36:35   ( -69.97,-117.64) 07/25/2025   07:35:25  ( -69.94,-117.61)    3.14                70
 07/27/2025   22:12:03   ( -70.13,  23.25) 07/27/2025   22:12:57  ( -70.14,  23.28)    1.65                54
 07/27/2025   23:02:47   (  70.04,-169.29) 07/27/2025   23:02:24  (  70.04,-169.23)    2.52                23
 07/27/2025   23:53:15   ( -69.19,  -0.74) 07/27/2025   23:52:07  ( -69.21,  -2.71)   78.10                68
 07/30/2025   14:28:58   ( -70.10, 139.07) 07/30/2025   14:29:27  ( -70.11, 139.12)    2.30                29
 07/30/2025   15:19:41   (  69.95, -53.40) 07/30/2025   15:18:55  (  69.94, -53.47)    2.97                46
 08/02/2025   05:55:14   (  70.34,  87.14) 08/02/2025   05:56:25  (  70.27,  87.60)   18.97                71
 08/02/2025   06:45:53   ( -70.06,-105.11) 08/02/2025   06:45:57  ( -70.06,-105.07)    1.55                 4
 08/02/2025   07:36:36   (  69.93,  62.41) 08/02/2025   07:35:24  (  69.94,  62.41)    2.01                72
 08/04/2025   22:12:05   (  70.11,-156.73) 08/04/2025   22:12:57  (  70.09,-156.78)    3.33                52
 08/04/2025   23:02:47   ( -69.98,  10.78) 08/04/2025   23:02:27  ( -69.99,  10.71)    2.62                20
 08/04/2025   23:53:15   (  69.05, 179.44) 08/04/2025   23:52:08  (  69.09, 177.15)   90.89                67
 08/07/2025   14:28:59   (  70.09, -40.93) 08/07/2025   14:29:24  (  70.10, -40.87)    2.71                25
 08/07/2025   15:19:41   ( -69.96, 126.59) 08/07/2025   15:18:55  ( -69.95, 126.55)    1.62                46