Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 15.  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)
 09/16/2025   14:28:47   ( -70.12, 139.08) 09/16/2025   14:29:46  ( -70.14, 139.14)    3.44                59
 09/16/2025   15:19:31   (  70.00, -53.43) 09/16/2025   15:19:14  (  69.99, -53.44)    1.14                17
 09/16/2025   16:10:02   ( -69.33, 114.86) 09/16/2025   16:08:53  ( -69.38, 113.36)   59.24                69
 09/19/2025   06:45:40   ( -70.09,-105.10) 09/19/2025   06:46:16  ( -70.06,-105.09)    3.05                36
 09/19/2025   07:36:24   (  69.97,  62.39) 09/19/2025   07:35:43  (  69.96,  62.41)    1.25                41
 09/21/2025   22:11:59   (  70.57,-157.40) 09/21/2025   22:13:09  (  70.46,-156.26)   43.82                70
 09/21/2025   23:02:32   ( -70.02,  10.79) 09/21/2025   23:02:45  ( -70.02,  10.73)    2.26                13
 09/21/2025   23:53:16   (  69.90, 178.28) 09/21/2025   23:52:12  (  69.92, 178.23)    3.06                64
 09/24/2025   14:28:44   (  70.13, -40.93) 09/24/2025   14:29:43  (  70.12, -40.87)    2.51                59
 09/24/2025   15:19:25   ( -70.00, 126.60) 09/24/2025   15:19:13  ( -70.02, 126.61)    1.84                12
 09/24/2025   16:09:59   (  69.35, -65.14) 09/24/2025   16:08:49  (  69.41, -66.57)   56.80                70
 09/27/2025   06:45:35   (  70.07,  74.95) 09/27/2025   06:46:10  (  70.10,  74.98)    3.24                35
 09/27/2025   07:36:17   ( -69.99,-117.61) 09/27/2025   07:35:40  ( -69.99,-117.53)    2.88                37