Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 18.  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   06:44:51   (  70.18,  75.01) 04/20/2025   06:45:48  (  70.21,  75.01)    3.52                57
 04/20/2025   07:35:34   ( -70.11,-117.58) 04/20/2025   07:35:18  ( -70.10,-117.52)    3.01                16
 04/20/2025   08:26:05   (  69.34,  50.87) 04/20/2025   08:24:56  (  69.38,  49.15)   67.62                69
 04/22/2025   23:01:41   (  70.17,-169.19) 04/22/2025   23:02:15  (  70.17,-169.16)    1.32                34
 04/22/2025   23:52:23   ( -70.05,  -1.69) 04/22/2025   23:51:45  ( -70.06,  -1.68)    0.66                38
 04/25/2025   14:27:57   ( -70.78, 138.32) 04/25/2025   14:29:06  ( -70.69, 139.85)   57.16                69
 04/25/2025   15:18:30   (  70.13, -53.33) 04/25/2025   15:18:41  (  70.15, -53.31)    2.29                11
 04/25/2025   16:09:12   ( -70.01, 114.17) 04/25/2025   16:08:11  ( -70.04, 114.17)    3.31                61
 04/28/2025   06:44:36   ( -70.22,-105.00) 04/28/2025   06:45:40  ( -70.20,-104.99)    2.92                64
 04/28/2025   07:35:19   (  70.09,  62.51) 04/28/2025   07:35:07  (  70.08,  62.50)    1.32                12
 04/28/2025   08:25:54   ( -69.60,-129.44) 04/28/2025   08:24:43  ( -69.65,-130.48)   40.41                71
 04/30/2025   23:01:23   ( -70.15,  10.91) 04/30/2025   23:02:04  ( -70.15,  10.85)    2.46                41
 04/30/2025   23:52:07   (  70.07, 178.34) 04/30/2025   23:51:30  (  70.09, 178.40)    3.26                37