Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 8.  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)
 09/08/2025   14:28:53   (  70.12, -40.94) 09/08/2025   14:29:45  (  70.13, -40.88)    2.72                52
 09/08/2025   15:19:35   ( -70.02, 126.52) 09/08/2025   15:19:15  ( -70.02, 126.59)    2.47                20
 09/08/2025   16:10:03   (  69.06, -64.78) 09/08/2025   16:08:56  (  69.14, -66.95)   86.69                67
 09/11/2025   06:45:46   (  70.07,  74.90) 09/11/2025   06:46:16  (  70.05,  74.88)    3.21                30
 09/11/2025   07:36:28   ( -69.98,-117.64) 09/11/2025   07:35:45  ( -69.99,-117.57)    2.71                43
 09/13/2025   22:12:02   ( -70.51,  22.68) 09/13/2025   22:13:13  ( -70.42,  23.66)   37.78                71
 09/13/2025   23:02:39   (  70.04,-169.26) 09/13/2025   23:02:45  (  70.05,-169.24)    1.34                 6
 09/13/2025   23:53:21   ( -69.94,  -1.80) 09/13/2025   23:52:15  ( -69.94,  -1.76)    1.86                66
 09/16/2025   14:28:47   ( -70.12, 139.08) 09/16/2025   14:29:46  ( -70.13, 139.12)    1.80                59
 09/16/2025   15:19:31   (  70.01, -53.44) 09/16/2025   15:19:13  (  70.02, -53.39)    2.33                18
 09/16/2025   16:10:02   ( -69.33, 114.87) 09/16/2025   16:08:52  ( -69.42, 113.42)   57.66                70
 09/19/2025   06:45:40   ( -70.10,-105.11) 09/19/2025   06:46:15  ( -70.08,-105.06)    2.38                35
 09/19/2025   07:36:24   (  69.98,  62.37) 09/19/2025   07:35:42  (  69.97,  62.42)    2.64                42
 09/21/2025   22:11:58   (  70.54,-157.34) 09/21/2025   22:13:08  (  70.44,-156.29)   40.65                70
 09/21/2025   23:02:32   ( -70.03,  10.78) 09/21/2025   23:02:44  ( -70.01,  10.72)    3.33                12
 09/21/2025   23:53:16   (  69.91, 178.26) 09/21/2025   23:52:11  (  69.89, 178.20)    3.40                65