Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 11.  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)
 04/12/2025   06:45:04   ( -70.17,-105.03) 04/12/2025   06:45:54  ( -70.19,-105.03)    1.46                50
 04/12/2025   07:35:48   (  70.09,  62.41) 04/12/2025   07:35:21  (  70.08,  62.47)    2.45                27
 04/12/2025   08:26:13   ( -69.07,-128.80) 04/12/2025   08:25:06  ( -69.14,-131.17)   94.38                67
 04/14/2025   23:01:55   ( -70.18,  10.75) 04/14/2025   23:02:23  ( -70.16,  10.81)    3.36                28
 04/14/2025   23:52:38   (  70.05, 178.26) 04/14/2025   23:51:50  (  70.05, 178.30)    1.63                48
 04/17/2025   14:28:07   (  70.48, -41.25) 04/17/2025   14:29:18  (  70.41, -40.58)   26.39                71
 04/17/2025   15:18:45   ( -70.15, 126.58) 04/17/2025   15:18:51  ( -70.14, 126.66)    3.13                 6
 04/17/2025   16:09:28   (  70.02, -65.91) 04/17/2025   16:08:18  (  70.03, -65.85)    2.27                70
 04/20/2025   06:44:52   (  70.20,  74.97) 04/20/2025   06:45:49  (  70.17,  74.96)    3.39                57
 04/20/2025   07:35:34   ( -70.08,-117.52) 04/20/2025   07:35:19  ( -70.07,-117.55)    1.75                15
 04/20/2025   08:26:05   (  69.31,  50.92) 04/20/2025   08:24:57  (  69.34,  49.10)   71.29                68
 04/22/2025   23:01:40   (  70.15,-169.15) 04/22/2025   23:02:14  (  70.16,-169.17)    1.81                34
 04/22/2025   23:52:23   ( -70.07,  -1.72) 04/22/2025   23:51:44  ( -70.06,  -1.68)    2.20                39