Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 14.  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)
 08/15/2025   14:28:58   ( -70.09, 139.08) 08/15/2025   14:29:39  ( -70.09, 139.06)    0.76                41
 08/15/2025   15:19:42   (  70.00, -53.48) 08/15/2025   15:19:06  (  69.99, -53.43)    2.05                36
 08/18/2025   05:55:22   (  70.79,  86.42) 08/18/2025   05:56:30  (  70.70,  88.21)   66.24                68
 08/18/2025   06:45:52   ( -70.04,-105.07) 08/18/2025   06:46:10  ( -70.05,-105.12)    2.26                18
 08/18/2025   07:36:36   (  69.95,  62.37) 08/18/2025   07:35:37  (  69.94,  62.38)    1.29                59
 08/20/2025   22:12:04   (  70.11,-156.73) 08/20/2025   22:13:10  (  70.14,-156.73)    3.33                66
 08/20/2025   23:02:47   ( -70.04,  10.69) 08/20/2025   23:02:40  ( -70.04,  10.75)    2.12                 7
 08/20/2025   23:53:24   (  69.59, 178.68) 08/20/2025   23:52:12  (  69.65, 177.86)   32.53                72
 08/23/2025   14:28:57   (  70.08, -40.90) 08/23/2025   14:29:40  (  70.06, -40.97)    3.39                43
 08/23/2025   15:19:40   ( -70.00, 126.53) 08/23/2025   15:19:09  ( -70.01, 126.59)    2.40                31
 08/26/2025   05:55:23   ( -70.96, -93.85) 08/26/2025   05:56:30  ( -70.83, -91.59)   83.23                67
 08/26/2025   06:45:51   (  70.04,  74.93) 08/26/2025   06:46:09  (  70.06,  74.92)    2.73                18
 08/26/2025   07:36:34   ( -69.97,-117.64) 08/26/2025   07:35:39  ( -69.96,-117.59)    2.04                55