Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 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)
 06/12/2025   14:28:39   ( -70.12, 139.12) 06/12/2025   14:29:06  ( -70.10, 139.10)    2.17                27
 06/12/2025   15:19:24   (  70.02, -53.42) 06/12/2025   15:18:33  (  70.00, -53.40)    2.11                51
 06/15/2025   05:54:56   (  70.29,  87.30) 06/15/2025   05:56:07  (  70.25,  87.55)   10.10                71
 06/15/2025   06:45:35   ( -70.07,-105.04) 06/15/2025   06:45:38  ( -70.09,-105.05)    2.08                 3
 06/15/2025   07:36:19   (  69.92,  62.49) 06/15/2025   07:35:06  (  69.93,  62.37)    4.72                73
 06/17/2025   22:11:50   (  70.14,-156.70) 06/17/2025   22:12:40  (  70.16,-156.70)    2.77                50
 06/17/2025   23:02:32   ( -70.07,  10.71) 06/17/2025   23:02:10  ( -70.06,  10.78)    3.21                22
 06/17/2025   23:52:59   (  69.02, 179.54) 06/17/2025   23:51:53  (  69.06, 177.08)   97.99                66
 06/20/2025   14:28:46   (  70.10, -40.88) 06/20/2025   14:29:12  (  70.11, -40.90)    1.61                26
 06/20/2025   15:19:28   ( -70.03, 126.54) 06/20/2025   15:18:42  ( -70.01, 126.59)    3.07                46
 06/23/2025   05:55:01   ( -70.41, -92.90) 06/23/2025   05:56:13  ( -70.32, -92.36)   22.52                72
 06/23/2025   06:45:41   (  70.06,  74.94) 06/23/2025   06:45:43  (  70.04,  74.88)    3.15                 2
 06/23/2025   07:36:22   ( -69.94,-117.55) 06/23/2025   07:35:13  ( -69.94,-117.62)    2.75                69