Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 16.  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   ( -70.10, 139.11) 09/16/2025   14:29:47  ( -70.11, 139.09)    1.74                60
 09/16/2025   15:19:32   (  70.03, -53.48) 09/16/2025   15:19:14  (  70.01, -53.40)    3.33                18
 09/16/2025   16:10:03   ( -69.37, 114.82) 09/16/2025   16:08:53  ( -69.40, 113.39)   56.18                70
 09/19/2025   06:45:40   ( -70.07,-105.07) 09/19/2025   06:46:16  ( -70.09,-105.06)    1.89                36
 09/19/2025   07:36:24   (  69.95,  62.43) 09/19/2025   07:35:44  (  69.93,  62.36)    3.18                40
 09/21/2025   22:11:59   (  70.55,-157.36) 09/21/2025   22:13:09  (  70.48,-156.23)   42.33                70
 09/21/2025   23:02:33   ( -70.05,  10.75) 09/21/2025   23:02:45  ( -70.04,  10.76)    0.67                12
 09/21/2025   23:53:17   (  69.92, 178.24) 09/21/2025   23:52:12  (  69.94, 178.26)    1.60                65
 09/24/2025   14:28:43   (  70.11, -40.88) 09/24/2025   14:29:43  (  70.09, -40.92)    2.59                60
 09/24/2025   15:19:24   ( -69.97, 126.64) 09/24/2025   15:19:13  ( -69.98, 126.56)    2.92                11
 09/24/2025   16:09:58   (  69.32, -65.10) 09/24/2025   16:08:49  (  69.37, -66.62)   60.21                69
 09/27/2025   06:45:35   (  70.04,  75.00) 09/27/2025   06:46:11  (  70.06,  74.93)    3.37                36
 09/27/2025   07:36:17   ( -69.96,-117.56) 09/27/2025   07:35:41  ( -69.95,-117.59)    1.40                36
 09/29/2025   22:11:54   ( -70.68,  22.47) 09/29/2025   22:13:04  ( -70.56,  23.90)   54.71                70
 09/29/2025   23:02:28   (  70.03,-169.21) 09/29/2025   23:02:39  (  70.01,-169.25)    3.03                11
 09/29/2025   23:53:09   ( -69.90,  -1.69) 09/29/2025   23:52:09  ( -69.90,  -1.76)    2.94                60