Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 15.  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)
 06/15/2025   05:54:55   (  70.25,  87.35) 06/15/2025   05:56:07  (  70.22,  87.51)    6.94                72
 06/15/2025   06:45:35   ( -70.09,-105.08) 06/15/2025   06:45:37  ( -70.11,-105.02)    2.53                 2
 06/15/2025   07:36:18   (  69.89,  62.54) 06/15/2025   07:35:06  (  69.90,  62.33)    8.11                72
 06/17/2025   22:11:50   (  70.16,-156.74) 06/17/2025   22:12:39  (  70.18,-156.68)    2.78                49
 06/17/2025   23:02:31   ( -70.05,  10.75) 06/17/2025   23:02:09  ( -70.06,  10.80)    2.33                22
 06/17/2025   23:52:58   (  68.99, 179.59) 06/17/2025   23:51:52  (  69.08, 177.10)   99.19                66
 06/20/2025   14:28:46   (  70.12, -40.92) 06/20/2025   14:29:11  (  70.11, -40.89)    1.81                25
 06/20/2025   15:19:27   ( -70.01, 126.58) 06/20/2025   15:18:41  ( -70.00, 126.59)    0.78                46
 06/23/2025   05:55:01   ( -70.39, -92.88) 06/23/2025   05:56:13  ( -70.30, -92.39)   21.02                72
 06/23/2025   06:45:42   (  70.10,  74.89) 06/23/2025   06:45:42  (  70.08,  74.94)    2.49                 0
 06/23/2025   07:36:23   ( -69.98,-117.61) 06/23/2025   07:35:12  ( -69.98,-117.57)    1.41                71
 06/25/2025   22:11:52   ( -70.15,  23.26) 06/25/2025   22:12:45  ( -70.15,  23.27)    0.90                53
 06/25/2025   23:02:36   (  70.02,-169.23) 06/25/2025   23:02:12  (  70.03,-169.24)    1.76                24
 06/25/2025   23:53:03   ( -69.15,  -0.65) 06/25/2025   23:51:55  ( -69.22,  -2.72)   82.40                68
 06/28/2025   14:28:48   ( -70.13, 139.06) 06/28/2025   14:29:15  ( -70.14, 139.14)    3.01                27
 06/28/2025   15:19:32   (  70.00, -53.43) 06/28/2025   15:18:42  (  70.02, -53.38)    2.98                50