Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 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)
 05/11/2025   14:28:13   ( -70.23, 139.08) 05/11/2025   14:29:08  ( -70.22, 139.15)    2.50                55
 05/11/2025   15:18:56   (  70.05, -53.35) 05/11/2025   15:18:36  (  70.07, -53.43)    3.46                20
 05/11/2025   16:09:25   ( -69.28, 115.11) 05/11/2025   16:08:17  ( -69.34, 113.22)   74.93                68
 05/14/2025   05:54:45   (  71.14,  86.02) 05/14/2025   05:55:51  (  71.06,  88.65)   95.22                66
 05/14/2025   06:45:10   ( -70.16,-105.06) 05/14/2025   06:45:35  ( -70.18,-105.03)    1.83                25
 05/14/2025   07:35:54   (  70.04,  62.43) 05/14/2025   07:35:03  (  70.02,  62.39)    3.21                51
 05/16/2025   22:11:26   (  70.25,-156.75) 05/16/2025   22:12:32  (  70.22,-156.72)    3.29                66
 05/16/2025   23:02:07   ( -70.10,  10.78) 05/16/2025   23:02:02  ( -70.10,  10.75)    1.27                 5
 05/16/2025   23:52:45   (  69.66, 178.75) 05/16/2025   23:51:34  (  69.72, 177.86)   34.84                71
 05/19/2025   14:28:23   (  70.19, -40.91) 05/19/2025   14:28:58  (  70.17, -40.89)    2.01                35
 05/19/2025   15:19:04   ( -70.05, 126.62) 05/19/2025   15:18:28  ( -70.06, 126.58)    2.02                36
 05/22/2025   05:54:41   ( -70.58, -93.07) 05/22/2025   05:55:52  ( -70.44, -92.26)   33.94                71
 05/22/2025   06:45:19   (  70.14,  74.92) 05/22/2025   06:45:22  (  70.16,  74.98)    3.11                 3
 05/22/2025   07:36:00   ( -70.00,-117.55) 05/22/2025   07:34:53  ( -70.00,-117.62)    2.72                67
 05/24/2025   22:11:31   ( -70.17,  23.33) 05/24/2025   22:12:21  ( -70.19,  23.26)    3.02                50
 05/24/2025   23:02:16   (  70.10,-169.25) 05/24/2025   23:01:48  (  70.07,-169.25)    3.19                28