Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 15.  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   14:28:07   (  70.48, -41.25) 04/17/2025   14:29:19  (  70.36, -40.66)   25.70                72
 04/17/2025   15:18:45   ( -70.15, 126.58) 04/17/2025   15:18:51  ( -70.14, 126.66)    3.06                 6
 04/17/2025   16:09:28   (  70.01, -65.90) 04/17/2025   16:08:18  (  70.03, -65.85)    2.74                70
 04/20/2025   06:44:52   (  70.19,  74.98) 04/20/2025   06:45:49  (  70.18,  74.97)    2.09                57
 04/20/2025   07:35:34   ( -70.07,-117.51) 04/20/2025   07:35:19  ( -70.07,-117.56)    1.77                15
 04/20/2025   08:26:05   (  69.30,  50.93) 04/20/2025   08:24:57  (  69.35,  49.11)   71.62                68
 04/22/2025   23:01:41   (  70.19,-169.21) 04/22/2025   23:02:14  (  70.17,-169.16)    3.06                33
 04/22/2025   23:52:23   ( -70.06,  -1.71) 04/22/2025   23:51:44  ( -70.06,  -1.68)    1.32                39
 04/25/2025   14:27:56   ( -70.74, 138.39) 04/25/2025   14:29:06  ( -70.60, 139.73)   51.33                70
 04/25/2025   15:18:30   (  70.14, -53.35) 04/25/2025   15:18:40  (  70.11, -53.35)    3.55                10
 04/25/2025   16:09:12   ( -70.02, 114.16) 04/25/2025   16:08:10  ( -70.00, 114.13)    1.86                62
 04/28/2025   06:44:36   ( -70.23,-105.01) 04/28/2025   06:45:37  ( -70.23,-104.93)    2.77                61
 04/28/2025   07:35:19   (  70.10,  62.50) 04/28/2025   07:35:04  (  70.11,  62.54)    1.86                15
 04/28/2025   08:25:52   ( -69.50,-129.29) 04/28/2025   08:24:42  ( -69.57,-130.58)   50.32                70