Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 17.  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   (  70.49, -41.28) 04/17/2025   14:29:18  (  70.40, -40.60)   27.34                71
 04/17/2025   15:18:44   ( -70.11, 126.63) 04/17/2025   15:18:51  ( -70.12, 126.63)    0.43                 7
 04/17/2025   16:09:28   (  70.03, -65.93) 04/17/2025   16:08:18  (  70.01, -65.87)    2.85                70
 04/20/2025   06:44:52   (  70.21,  74.95) 04/20/2025   06:45:48  (  70.22,  75.03)    2.77                56
 04/20/2025   07:35:34   ( -70.10,-117.55) 04/20/2025   07:35:18  ( -70.11,-117.50)    2.22                16
 04/20/2025   08:26:05   (  69.32,  50.90) 04/20/2025   08:24:56  (  69.39,  49.16)   68.47                69
 04/22/2025   23:01:41   (  70.16,-169.17) 04/22/2025   23:02:15  (  70.16,-169.17)    0.35                34
 04/22/2025   23:52:23   ( -70.04,  -1.67) 04/22/2025   23:51:45  ( -70.05,  -1.69)    1.72                38
 04/25/2025   14:27:57   ( -70.77, 138.34) 04/25/2025   14:29:06  ( -70.66, 139.80)   55.01                69
 04/25/2025   15:18:29   (  70.11, -53.31) 04/25/2025   15:18:40  (  70.11, -53.36)    1.86                11
 04/25/2025   16:09:11   ( -69.99, 114.19) 04/25/2025   16:08:10  ( -70.00, 114.13)    2.60                61
 04/28/2025   06:44:35   ( -70.21,-104.98) 04/28/2025   06:45:37  ( -70.24,-104.92)    3.34                62
 04/28/2025   07:35:18   (  70.08,  62.53) 04/28/2025   07:35:05  (  70.07,  62.48)    2.86                13
 04/28/2025   08:25:52   ( -69.54,-129.34) 04/28/2025   08:24:41  ( -69.63,-130.49)   45.65                71
 04/30/2025   23:01:23   ( -70.14,  10.92) 04/30/2025   23:02:02  ( -70.15,  10.85)    2.93                39
 04/30/2025   23:52:07   (  70.07, 178.35) 04/30/2025   23:51:28  (  70.09, 178.40)    2.92                39