Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 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)
 04/17/2025   14:28:08   (  70.51, -41.30) 04/17/2025   14:29:19  (  70.38, -40.63)   29.26                71
 04/17/2025   15:18:45   ( -70.13, 126.61) 04/17/2025   15:18:52  ( -70.10, 126.61)    3.41                 7
 04/17/2025   16:09:28   (  70.00, -65.88) 04/17/2025   16:08:19  (  70.00, -65.90)    0.82                69
 04/20/2025   06:44:51   (  70.18,  75.01) 04/20/2025   06:45:48  (  70.20,  75.00)    2.72                57
 04/20/2025   07:35:34   ( -70.11,-117.57) 04/20/2025   07:35:18  ( -70.09,-117.52)    2.83                16
 04/20/2025   08:26:05   (  69.34,  50.88) 04/20/2025   08:24:56  (  69.37,  49.14)   68.19                69
 04/22/2025   23:01:41   (  70.17,-169.19) 04/22/2025   23:02:15  (  70.14,-169.20)    3.17                34
 04/22/2025   23:52:23   ( -70.05,  -1.69) 04/22/2025   23:51:45  ( -70.03,  -1.72)    2.11                38
 04/25/2025   14:27:56   ( -70.72, 138.42) 04/25/2025   14:29:06  ( -70.64, 139.78)   51.00                70
 04/25/2025   15:18:30   (  70.12, -53.32) 04/25/2025   15:18:40  (  70.15, -53.30)    2.74                10
 04/25/2025   16:09:12   ( -70.00, 114.18) 04/25/2025   16:08:11  ( -69.98, 114.10)    3.36                61
 04/28/2025   06:44:36   ( -70.21,-104.98) 04/28/2025   06:45:38  ( -70.22,-104.95)    1.55                62
 04/28/2025   07:35:19   (  70.09,  62.52) 04/28/2025   07:35:05  (  70.10,  62.53)    1.89                14
 04/28/2025   08:25:53   ( -69.54,-129.35) 04/28/2025   08:24:42  ( -69.61,-130.51)   45.91                71