Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 9.  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)
 04/09/2025   14:28:14   ( -70.21, 139.13) 04/09/2025   14:29:25  ( -70.19, 139.10)    2.57                71
 04/09/2025   15:18:57   (  70.07, -53.35) 04/09/2025   15:18:52  (  70.08, -53.40)    2.40                 5
 04/09/2025   16:09:37   ( -69.85, 114.30) 04/09/2025   16:08:24  ( -69.86, 113.92)   14.37                73
 04/12/2025   06:45:04   ( -70.15,-104.99) 04/12/2025   06:45:55  ( -70.16,-105.06)    2.92                51
 04/12/2025   07:35:48   (  70.07,  62.44) 04/12/2025   07:35:22  (  70.06,  62.43)    1.45                26
 04/12/2025   08:26:13   ( -69.05,-128.76) 04/12/2025   08:25:07  ( -69.12,-131.20)   96.91                66
 04/14/2025   23:01:55   ( -70.16,  10.78) 04/14/2025   23:02:24  ( -70.15,  10.79)    1.04                29
 04/14/2025   23:52:38   (  70.03, 178.29) 04/14/2025   23:51:51  (  70.04, 178.28)    1.29                47
 04/17/2025   14:28:08   (  70.51, -41.30) 04/17/2025   14:29:19  (  70.41, -40.58)   28.98                71
 04/17/2025   15:18:45   ( -70.12, 126.62) 04/17/2025   15:18:52  ( -70.14, 126.66)    2.37                 7
 04/17/2025   16:09:28   (  69.99, -65.87) 04/17/2025   16:08:19  (  70.03, -65.85)    3.49                69
 04/20/2025   06:44:51   (  70.18,  75.02) 04/20/2025   06:45:49  (  70.19,  74.98)    1.92                58
 04/20/2025   07:35:34   ( -70.10,-117.56) 04/20/2025   07:35:19  ( -70.09,-117.53)    1.92                15
 04/20/2025   08:26:05   (  69.34,  50.88) 04/20/2025   08:24:56  (  69.42,  49.20)   66.53                69
 04/22/2025   23:01:41   (  70.17,-169.19) 04/22/2025   23:02:16  (  70.14,-169.20)    3.02                35
 04/22/2025   23:52:23   ( -70.04,  -1.67) 04/22/2025   23:51:46  ( -70.04,  -1.71)    1.34                37