Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 7.  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   ( -70.19, 139.16) 04/09/2025   14:29:26  ( -70.18, 139.09)    2.75                72
 04/09/2025   15:18:58   (  70.11, -53.40) 04/09/2025   15:18:53  (  70.08, -53.41)    3.13                 5
 04/09/2025   16:09:37   ( -69.83, 114.33) 04/09/2025   16:08:24  ( -69.91, 113.99)   16.05                73
 04/12/2025   06:45:05   ( -70.18,-105.04) 04/12/2025   06:45:57  ( -70.17,-105.06)    1.79                52
 04/12/2025   07:35:48   (  70.05,  62.47) 04/12/2025   07:35:24  (  70.06,  62.43)    1.67                24
 04/12/2025   08:26:15   ( -69.14,-128.88) 04/12/2025   08:25:08  ( -69.18,-131.12)   88.80                67
 04/14/2025   23:01:54   ( -70.14,  10.81) 04/14/2025   23:02:27  ( -70.15,  10.78)    1.52                33
 04/14/2025   23:52:38   (  70.07, 178.23) 04/14/2025   23:51:54  (  70.04, 178.27)    3.28                44
 04/17/2025   14:28:11   (  70.71, -41.63) 04/17/2025   14:29:21  (  70.61, -40.31)   49.73                70
 04/17/2025   15:18:44   ( -70.11, 126.64) 04/17/2025   15:18:58  ( -70.12, 126.61)    1.80                14
 04/17/2025   16:09:27   (  69.99, -65.86) 04/17/2025   16:08:25  (  70.01, -65.90)    3.16                62
 04/20/2025   06:44:51   (  70.18,  75.02) 04/20/2025   06:45:59  (  70.19,  74.95)    3.36                68
 04/20/2025   07:35:34   ( -70.10,-117.55) 04/20/2025   07:35:29  ( -70.10,-117.56)    0.51                 5
 04/20/2025   08:26:12   (  69.71,  50.34) 04/20/2025   08:25:00  (  69.76,  49.62)   28.50                72