Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 13.  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)
 04/14/2025   23:01:55   ( -70.15,  10.79) 04/14/2025   23:02:24  ( -70.13,  10.77)    2.40                29
 04/14/2025   23:52:38   (  70.02, 178.31) 04/14/2025   23:51:51  (  70.03, 178.27)    1.81                47
 04/17/2025   14:28:07   (  70.50, -41.29) 04/17/2025   14:29:18  (  70.39, -40.61)   28.26                71
 04/17/2025   15:18:44   ( -70.12, 126.63) 04/17/2025   15:18:51  ( -70.12, 126.63)    0.42                 7
 04/17/2025   16:09:27   (  69.99, -65.86) 04/17/2025   16:08:18  (  70.01, -65.88)    2.41                69
 04/20/2025   06:44:51   (  70.17,  75.02) 04/20/2025   06:45:49  (  70.16,  74.95)    3.04                58
 04/20/2025   07:35:34   ( -70.10,-117.55) 04/20/2025   07:35:18  ( -70.11,-117.50)    2.46                16
 04/20/2025   08:26:05   (  69.33,  50.89) 04/20/2025   08:24:56  (  69.39,  49.16)   67.94                69
 04/22/2025   23:01:41   (  70.16,-169.18) 04/22/2025   23:02:15  (  70.16,-169.17)    0.47                34
 04/22/2025   23:52:23   ( -70.04,  -1.67) 04/22/2025   23:51:45  ( -70.06,  -1.68)    1.93                38
 04/25/2025   14:27:57   ( -70.77, 138.34) 04/25/2025   14:29:06  ( -70.67, 139.83)   55.62                69
 04/25/2025   15:18:30   (  70.12, -53.32) 04/25/2025   15:18:41  (  70.12, -53.34)    0.82                11
 04/25/2025   16:09:12   ( -70.00, 114.19) 04/25/2025   16:08:11  ( -70.02, 114.15)    2.73                61