Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 28.  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)
 06/28/2025   14:28:48   ( -70.10, 139.11) 06/28/2025   14:29:16  ( -70.13, 139.12)    2.77                28
 06/28/2025   15:19:33   (  70.01, -53.45) 06/28/2025   15:18:43  (  70.03, -53.37)    3.30                50
 07/01/2025   05:55:05   (  70.30,  87.25) 07/01/2025   05:56:16  (  70.23,  87.52)   12.99                71
 07/01/2025   06:45:44   ( -70.07,-105.08) 07/01/2025   06:45:47  ( -70.07,-105.08)    0.76                 3
 07/01/2025   07:36:27   (  69.88,  62.51) 07/01/2025   07:35:15  (  69.91,  62.34)    7.16                72
 07/03/2025   22:11:57   (  70.12,-156.72) 07/03/2025   22:12:46  (  70.15,-156.70)    3.37                49
 07/03/2025   23:02:39   ( -70.05,  10.72) 07/03/2025   23:02:16  ( -70.05,  10.78)    2.18                23
 07/06/2025   14:28:53   (  70.11, -40.93) 07/06/2025   14:29:16  (  70.12, -40.87)    2.30                23
 07/06/2025   15:19:34   ( -69.97, 126.60) 07/06/2025   15:18:47  ( -69.96, 126.54)    2.69                47
 07/09/2025   05:55:06   ( -70.27, -92.71) 07/09/2025   05:56:18  ( -70.24, -92.46)   10.11                72
 07/09/2025   06:45:48   (  70.05,  74.94) 07/09/2025   06:45:46  (  70.07,  74.94)    2.60                 2
 07/09/2025   07:36:30   ( -69.96,-117.61) 07/09/2025   07:35:16  ( -69.97,-117.56)    2.31                74
 07/11/2025   22:12:00   ( -70.15,  23.24) 07/11/2025   22:12:49  ( -70.13,  23.26)    2.77                49
 07/11/2025   23:02:43   (  69.99,-169.21) 07/11/2025   23:02:16  (  70.01,-169.26)    3.08                27