Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 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)
 04/12/2025   06:45:05   ( -70.21,-105.09) 04/12/2025   06:45:54  ( -70.20,-105.01)    3.25                49
 04/12/2025   07:35:48   (  70.08,  62.43) 04/12/2025   07:35:21  (  70.09,  62.49)    2.93                27
 04/12/2025   08:26:13   ( -69.06,-128.78) 04/12/2025   08:25:07  ( -69.10,-131.22)   97.21                66
 04/14/2025   23:01:55   ( -70.16,  10.77) 04/14/2025   23:02:23  ( -70.17,  10.83)    2.31                28
 04/14/2025   23:52:38   (  70.03, 178.29) 04/14/2025   23:51:51  (  70.01, 178.24)    3.15                47
 04/17/2025   14:28:07   (  70.46, -41.22) 04/17/2025   14:29:19  (  70.36, -40.65)   23.92                72
 04/17/2025   15:18:45   ( -70.12, 126.62) 04/17/2025   15:18:51  ( -70.15, 126.68)    3.38                 6
 04/17/2025   16:09:28   (  70.00, -65.87) 04/17/2025   16:08:19  (  69.98, -65.92)    2.40                69
 04/20/2025   06:44:51   (  70.17,  75.02) 04/20/2025   06:45:48  (  70.18,  74.97)    1.86                57
 04/20/2025   07:35:34   ( -70.10,-117.55) 04/20/2025   07:35:18  ( -70.07,-117.54)    2.78                16
 04/20/2025   08:26:04   (  69.28,  50.96) 04/20/2025   08:24:56  (  69.35,  49.11)   72.87                68
 04/22/2025   23:01:41   (  70.16,-169.17) 04/22/2025   23:02:14  (  70.16,-169.16)    0.53                33
 04/22/2025   23:52:23   ( -70.03,  -1.66) 04/22/2025   23:51:44  ( -70.06,  -1.67)    3.08                39