Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 18.  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)
 07/19/2025   22:12:03   (  70.14,-156.75) 07/19/2025   22:12:53  (  70.16,-156.70)    3.05                50
 07/19/2025   23:02:45   ( -70.04,  10.71) 07/19/2025   23:02:23  ( -70.05,  10.78)    2.87                22
 07/19/2025   23:53:12   (  69.02, 179.49) 07/19/2025   23:52:06  (  69.06, 177.09)   95.68                66
 07/22/2025   14:28:57   (  70.09, -40.92) 07/22/2025   14:29:24  (  70.07, -40.94)    2.56                27
 07/22/2025   15:19:39   ( -69.99, 126.55) 07/22/2025   15:18:54  ( -69.97, 126.55)    2.48                45
 07/25/2025   05:55:13   ( -70.41, -92.96) 07/25/2025   05:56:25  ( -70.30, -92.37)   24.92                72
 07/25/2025   06:45:52   (  70.05,  74.91) 07/25/2025   06:45:55  (  70.03,  74.88)    3.22                 3
 07/25/2025   07:36:34   ( -69.94,-117.61) 07/25/2025   07:35:25  ( -69.93,-117.63)    2.08                69
 07/27/2025   22:12:04   ( -70.16,  23.21) 07/27/2025   22:12:58  ( -70.14,  23.27)    3.27                54
 07/27/2025   23:02:47   (  70.02,-169.27) 07/27/2025   23:02:25  (  70.02,-169.25)    0.92                22
 07/27/2025   23:53:16   ( -69.21,  -0.78) 07/27/2025   23:52:07  ( -69.26,  -2.65)   74.13                69
 07/30/2025   14:28:58   ( -70.07, 139.11) 07/30/2025   14:29:29  ( -70.07, 139.05)    2.37                31
 07/30/2025   15:19:42   (  69.98, -53.45) 07/30/2025   15:18:55  (  70.00, -53.39)    3.08                47