Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 7.  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   (  70.11, -40.93) 09/08/2025   14:29:46  (  70.08, -40.95)    3.34                53
 09/08/2025   15:19:35   ( -70.01, 126.53) 09/08/2025   15:19:15  ( -70.02, 126.60)    2.54                20
 09/08/2025   16:10:03   (  69.06, -64.77) 09/08/2025   16:08:56  (  69.15, -66.94)   86.86                67
 09/11/2025   06:45:46   (  70.07,  74.91) 09/11/2025   06:46:16  (  70.05,  74.88)    2.64                30
 09/11/2025   07:36:28   ( -69.97,-117.62) 09/11/2025   07:35:45  ( -69.99,-117.57)    3.00                43
 09/13/2025   22:12:02   ( -70.51,  22.69) 09/13/2025   22:13:13  ( -70.42,  23.65)   37.03                71
 09/13/2025   23:02:39   (  70.03,-169.25) 09/13/2025   23:02:45  (  70.04,-169.25)    0.68                 6
 09/13/2025   23:53:20   ( -69.94,  -1.79) 09/13/2025   23:52:14  ( -69.93,  -1.77)    1.23                66
 09/16/2025   14:28:47   ( -70.11, 139.09) 09/16/2025   14:29:46  ( -70.11, 139.09)    0.30                59
 09/16/2025   15:19:31   (  70.00, -53.43) 09/16/2025   15:19:13  (  70.00, -53.42)    0.56                18
 09/16/2025   16:10:02   ( -69.32, 114.88) 09/16/2025   16:08:52  ( -69.40, 113.39)   58.89                70
 09/19/2025   06:45:40   ( -70.09,-105.09) 09/19/2025   06:46:14  ( -70.10,-105.04)    2.40                34
 09/19/2025   07:36:24   (  69.98,  62.38) 09/19/2025   07:35:41  (  69.98,  62.45)    2.62                43