Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 19.  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   (  70.13,-156.75) 07/19/2025   22:12:53  (  70.16,-156.70)    3.18                50
 07/19/2025   23:02:45   ( -70.04,  10.71) 07/19/2025   23:02:23  ( -70.05,  10.78)    2.75                22
 07/19/2025   23:53:12   (  69.02, 179.49) 07/19/2025   23:52:06  (  69.06, 177.09)   95.73                66
 07/22/2025   14:28:57   (  70.09, -40.92) 07/22/2025   14:29:24  (  70.07, -40.94)    2.59                27
 07/22/2025   15:19:39   ( -69.99, 126.55) 07/22/2025   15:18:54  ( -69.96, 126.54)    3.01                45
 07/25/2025   05:55:13   ( -70.41, -92.96) 07/25/2025   05:56:25  ( -70.30, -92.38)   25.08                72
 07/25/2025   06:45:52   (  70.05,  74.91) 07/25/2025   06:45:54  (  70.08,  74.95)    3.27                 2
 07/25/2025   07:36:34   ( -69.94,-117.61) 07/25/2025   07:35:25  ( -69.92,-117.64)    2.83                69
 07/27/2025   22:12:03   ( -70.11,  23.29) 07/27/2025   22:12:58  ( -70.13,  23.26)    2.87                55
 07/27/2025   23:02:47   (  70.01,-169.26) 07/27/2025   23:02:25  (  70.02,-169.26)    0.30                22
 07/27/2025   23:53:15   ( -69.16,  -0.70) 07/27/2025   23:52:07  ( -69.26,  -2.66)   78.06                68
 07/30/2025   14:28:58   ( -70.07, 139.11) 07/30/2025   14:29:29  ( -70.06, 139.04)    3.12                31
 07/30/2025   15:19:42   (  69.98, -53.44) 07/30/2025   15:18:55  (  69.99, -53.41)    2.10                47
 08/02/2025   05:55:14   (  70.37,  87.10) 08/02/2025   05:56:25  (  70.28,  87.61)   21.49                71
 08/02/2025   06:45:52   ( -70.03,-105.06) 08/02/2025   06:45:58  ( -70.02,-105.13)    2.59                 6
 08/02/2025   07:36:36   (  69.95,  62.37) 08/02/2025   07:35:24  (  69.96,  62.43)    2.33                72