Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 19.  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)
 04/20/2025   06:44:52   (  70.20,  74.98) 04/20/2025   06:45:49  (  70.19,  74.98)    0.63                57
 04/20/2025   07:35:34   ( -70.08,-117.52) 04/20/2025   07:35:19  ( -70.07,-117.55)    1.07                15
 04/20/2025   08:26:05   (  69.31,  50.92) 04/20/2025   08:24:57  (  69.36,  49.12)   70.98                68
 04/22/2025   23:01:40   (  70.14,-169.13) 04/22/2025   23:02:15  (  70.15,-169.19)    2.58                35
 04/22/2025   23:52:23   ( -70.07,  -1.72) 04/22/2025   23:51:44  ( -70.09,  -1.64)    3.58                39
 04/25/2025   14:27:57   ( -70.79, 138.30) 04/25/2025   14:29:06  ( -70.67, 139.81)   57.33                69
 04/25/2025   15:18:30   (  70.14, -53.35) 04/25/2025   15:18:41  (  70.12, -53.34)    2.24                11
 04/25/2025   16:09:12   ( -70.02, 114.15) 04/25/2025   16:08:11  ( -70.01, 114.13)    1.37                61
 04/28/2025   06:44:36   ( -70.23,-105.01) 04/28/2025   06:45:39  ( -70.22,-104.95)    2.57                63
 04/28/2025   07:35:19   (  70.10,  62.50) 04/28/2025   07:35:06  (  70.11,  62.53)    1.32                13
 04/28/2025   08:25:53   ( -69.56,-129.38) 04/28/2025   08:24:42  ( -69.67,-130.44)   43.20                71
 04/30/2025   23:01:24   ( -70.15,  10.90) 04/30/2025   23:02:04  ( -70.17,  10.87)    2.34                40
 04/30/2025   23:52:08   (  70.08, 178.33) 04/30/2025   23:51:31  (  70.06, 178.35)    2.34                37