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   23:01:54   ( -70.14,  10.81) 04/14/2025   23:02:23  ( -70.15,  10.79)    1.09                29
 04/14/2025   23:52:38   (  70.06, 178.25) 04/14/2025   23:51:50  (  70.04, 178.29)    2.41                48
 04/17/2025   14:28:07   (  70.49, -41.27) 04/17/2025   14:29:18  (  70.40, -40.60)   27.15                71
 04/17/2025   15:18:44   ( -70.11, 126.65) 04/17/2025   15:18:51  ( -70.13, 126.64)    2.01                 7
 04/17/2025   16:09:28   (  70.03, -65.92) 04/17/2025   16:08:18  (  70.02, -65.87)    2.57                70
 04/20/2025   06:44:52   (  70.21,  74.96) 04/20/2025   06:45:48  (  70.22,  75.03)    2.68                56
 04/20/2025   07:35:34   ( -70.09,-117.54) 04/20/2025   07:35:18  ( -70.11,-117.49)    2.93                16
 04/20/2025   08:26:05   (  69.32,  50.90) 04/20/2025   08:24:56  (  69.39,  49.16)   68.53                69
 04/22/2025   23:01:41   (  70.16,-169.17) 04/22/2025   23:02:15  (  70.15,-169.18)    0.57                34
 04/22/2025   23:52:23   ( -70.03,  -1.66) 04/22/2025   23:51:45  ( -70.05,  -1.69)    2.09                38
 04/25/2025   14:27:56   ( -70.77, 138.35) 04/25/2025   14:29:05  ( -70.65, 139.80)   54.79                69
 04/25/2025   15:18:29   (  70.12, -53.31) 04/25/2025   15:18:40  (  70.10, -53.37)    3.03                11
 04/25/2025   16:09:11   ( -69.99, 114.19) 04/25/2025   16:08:10  ( -69.99, 114.12)    2.85                61