Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 17.  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)
 09/19/2025   06:45:40   ( -70.09,-105.09) 09/19/2025   06:46:16  ( -70.07,-105.08)    1.65                36
 09/19/2025   07:36:24   (  69.96,  62.40) 09/19/2025   07:35:43  (  69.97,  62.42)    1.18                41
 09/21/2025   22:11:59   (  70.56,-157.38) 09/21/2025   22:13:09  (  70.47,-156.25)   43.25                70
 09/21/2025   23:02:32   ( -70.01,  10.80) 09/21/2025   23:02:45  ( -70.03,  10.74)    3.10                13
 09/21/2025   23:53:17   (  69.94, 178.22) 09/21/2025   23:52:12  (  69.93, 178.24)    1.70                65
 09/24/2025   14:28:44   (  70.12, -40.91) 09/24/2025   14:29:43  (  70.14, -40.85)    2.65                59
 09/24/2025   15:19:25   ( -69.99, 126.61) 09/24/2025   15:19:14  ( -69.97, 126.55)    3.24                11
 09/24/2025   16:09:59   (  69.34, -65.12) 09/24/2025   16:08:50  (  69.37, -66.63)   59.42                69
 09/27/2025   06:45:35   (  70.06,  74.97) 09/27/2025   06:46:11  (  70.06,  74.92)    1.83                36
 09/27/2025   07:36:17   ( -69.98,-117.59) 09/27/2025   07:35:41  ( -69.95,-117.59)    3.29                36
 09/29/2025   22:11:54   ( -70.70,  22.43) 09/29/2025   22:13:03  ( -70.62,  23.99)   58.04                69
 09/29/2025   23:02:28   (  70.05,-169.23) 09/29/2025   23:02:38  (  70.07,-169.17)    3.41                10
 09/29/2025   23:53:09   ( -69.92,  -1.72) 09/29/2025   23:52:09  ( -69.91,  -1.76)    1.78                60