Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 5.  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)
 09/05/2025   22:12:03   (  70.30,-156.99) 09/05/2025   22:13:14  (  70.23,-156.63)   15.80                71
 09/05/2025   23:02:42   ( -70.04,  10.72) 09/05/2025   23:02:45  ( -70.05,  10.76)    2.41                 3
 09/05/2025   23:53:26   (  69.93, 178.19) 09/05/2025   23:52:13  (  69.90, 178.19)    3.49                73
 09/08/2025   14:28:53   (  70.09, -40.90) 09/08/2025   14:29:46  (  70.11, -40.92)    2.33                53
 09/08/2025   15:19:35   ( -69.99, 126.57) 09/08/2025   15:19:16  ( -69.99, 126.56)    0.90                19
 09/08/2025   16:10:04   (  69.09, -64.81) 09/08/2025   16:08:57  (  69.12, -66.98)   86.26                67
 09/11/2025   06:45:45   (  70.05,  74.94) 09/11/2025   06:46:15  (  70.07,  74.91)    2.55                30
 09/11/2025   07:36:27   ( -69.95,-117.59) 09/11/2025   07:35:45  ( -69.96,-117.61)    1.22                42
 09/13/2025   22:12:02   ( -70.54,  22.64) 09/13/2025   22:13:12  ( -70.43,  23.67)   40.39                70
 09/13/2025   23:02:38   (  70.02,-169.23) 09/13/2025   23:02:44  (  70.05,-169.23)    3.63                 6
 09/13/2025   23:53:20   ( -69.92,  -1.77) 09/13/2025   23:52:14  ( -69.94,  -1.75)    2.48                66
 09/16/2025   14:28:47   ( -70.10, 139.11) 09/16/2025   14:29:46  ( -70.11, 139.09)    1.09                59
 09/16/2025   15:19:31   (  69.99, -53.42) 09/16/2025   15:19:13  (  70.00, -53.42)    0.45                18
 09/16/2025   16:10:02   ( -69.31, 114.89) 09/16/2025   16:08:53  ( -69.34, 113.32)   61.94                69
 09/19/2025   06:45:40   ( -70.09,-105.09) 09/19/2025   06:46:14  ( -70.08,-105.06)    1.46                34
 09/19/2025   07:36:24   (  69.98,  62.38) 09/19/2025   07:35:41  (  69.97,  62.43)    2.08                43