Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 22.  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)
 07/22/2025   14:28:57   (  70.08, -40.90) 07/22/2025   14:29:24  (  70.08, -40.92)    1.08                27
 07/22/2025   15:19:39   ( -69.98, 126.57) 07/22/2025   15:18:54  ( -69.97, 126.56)    0.88                45
 07/25/2025   05:55:13   ( -70.40, -92.94) 07/25/2025   05:56:25  ( -70.30, -92.37)   24.02                72
 07/25/2025   06:45:52   (  70.04,  74.93) 07/25/2025   06:45:55  (  70.03,  74.89)    1.81                 3
 07/25/2025   07:36:34   ( -69.93,-117.59) 07/25/2025   07:35:25  ( -69.93,-117.63)    1.53                69
 07/27/2025   22:12:04   ( -70.15,  23.22) 07/27/2025   22:12:58  ( -70.13,  23.27)    2.45                54
 07/27/2025   23:02:47   (  70.00,-169.25) 07/27/2025   23:02:25  (  70.02,-169.25)    2.12                22
 07/27/2025   23:53:16   ( -69.20,  -0.76) 07/27/2025   23:52:07  ( -69.26,  -2.66)   74.89                69
 07/30/2025   14:28:58   ( -70.11, 139.05) 07/30/2025   14:29:27  ( -70.11, 139.11)    2.46                29
 07/30/2025   15:19:41   (  69.97, -53.43) 07/30/2025   15:18:54  (  69.99, -53.40)    2.85                47
 08/02/2025   05:55:14   (  70.36,  87.12) 08/02/2025   05:56:25  (  70.28,  87.60)   20.46                71
 08/02/2025   06:45:53   ( -70.07,-105.13) 08/02/2025   06:45:57  ( -70.07,-105.06)    2.70                 4
 08/02/2025   07:36:36   (  69.94,  62.39) 08/02/2025   07:35:24  (  69.95,  62.42)    1.66                72
 08/04/2025   22:12:05   (  70.12,-156.75) 08/04/2025   22:12:57  (  70.11,-156.75)    1.69                52
 08/04/2025   23:02:47   ( -69.99,  10.77) 08/04/2025   23:02:27  ( -70.01,  10.74)    2.39                20