Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 10.  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)
 11/11/2025   15:18:40   ( -70.09, 126.67) 11/11/2025   15:19:24  ( -70.09, 126.67)    0.13                44
 11/11/2025   16:09:25   (  70.00, -65.89) 11/11/2025   16:08:51  (  69.99, -65.83)    2.89                34
 11/14/2025   06:45:08   (  70.62,  74.26) 11/14/2025   06:46:17  (  70.52,  75.54)   48.70                69
 11/14/2025   07:35:40   ( -70.01,-117.46) 11/14/2025   07:35:54  ( -70.03,-117.54)    3.29                14
 11/14/2025   08:26:25   (  69.93,  49.97) 11/14/2025   08:25:21  (  69.92,  49.96)    1.60                64
 11/16/2025   23:01:59   (  70.09,-169.15) 11/16/2025   23:02:53  (  70.09,-169.20)    2.21                54
 11/16/2025   23:52:41   ( -70.00,  -1.69) 11/16/2025   23:52:23  ( -69.98,  -1.72)    2.41                18
 11/17/2025   00:43:10   (  69.08, 166.95) 11/17/2025   00:42:03  (  69.15, 164.80)   85.76                67
 11/19/2025   14:28:33   ( -71.10, 137.66) 11/19/2025   14:29:39  ( -70.98, 140.37)   98.76                66
 11/19/2025   15:18:59   (  70.04, -53.32) 11/19/2025   15:19:21  (  70.05, -53.37)    2.03                22
 11/19/2025   16:09:41   ( -69.94, 114.14) 11/19/2025   16:08:51  ( -69.95, 114.12)    0.87                50
 11/22/2025   06:45:14   ( -70.11,-104.99) 11/22/2025   06:46:21  ( -70.09,-105.06)    3.72                67
 11/22/2025   07:35:58   (  70.00,  62.49) 11/22/2025   07:35:47  (  70.03,  62.49)    2.97                11
 11/22/2025   08:26:34   ( -69.58,-129.57) 11/22/2025   08:25:22  ( -69.65,-130.40)   32.91                72