Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 11.  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)
 09/13/2025   22:12:03   ( -70.56,  22.61) 09/13/2025   22:13:13  ( -70.44,  23.68)   42.04                70
 09/13/2025   23:02:39   (  70.03,-169.25) 09/13/2025   23:02:46  (  70.01,-169.29)    2.49                 7
 09/13/2025   23:53:21   ( -69.94,  -1.80) 09/13/2025   23:52:15  ( -69.95,  -1.74)    2.50                66
 09/16/2025   14:28:47   ( -70.11, 139.10) 09/16/2025   14:29:47  ( -70.11, 139.09)    0.65                60
 09/16/2025   15:19:31   (  69.99, -53.42) 09/16/2025   15:19:14  (  70.01, -53.42)    1.61                17
 09/16/2025   16:10:03   ( -69.37, 114.81) 09/16/2025   16:08:53  ( -69.40, 113.39)   55.78                70
 09/19/2025   06:45:40   ( -70.08,-105.08) 09/19/2025   06:46:16  ( -70.09,-105.05)    1.98                36
 09/19/2025   07:36:24   (  69.96,  62.41) 09/19/2025   07:35:43  (  69.98,  62.44)    3.00                41
 09/21/2025   22:11:59   (  70.56,-157.37) 09/21/2025   22:13:09  (  70.49,-156.22)   43.38                70
 09/21/2025   23:02:33   ( -70.05,  10.74) 09/21/2025   23:02:45  ( -70.06,  10.78)    1.83                12
 09/21/2025   23:53:17   (  69.93, 178.23) 09/21/2025   23:52:12  (  69.95, 178.27)    2.38                65
 09/24/2025   14:28:44   (  70.11, -40.90) 09/24/2025   14:29:44  (  70.11, -40.89)    0.40                60
 09/24/2025   15:19:26   ( -70.03, 126.55) 09/24/2025   15:19:14  ( -70.01, 126.60)    2.91                12
 09/24/2025   16:09:59   (  69.33, -65.11) 09/24/2025   16:08:50  (  69.40, -66.59)   58.79                69