Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 8.  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)
 07/09/2025   05:55:06   ( -70.27, -92.72) 07/09/2025   05:56:18  ( -70.21, -92.49)   10.77                72
 07/09/2025   06:45:48   (  70.04,  74.95) 07/09/2025   06:45:46  (  70.06,  74.93)    2.06                 2
 07/09/2025   07:36:29   ( -69.91,-117.53) 07/09/2025   07:35:16  ( -69.94,-117.60)    4.60                73
 07/11/2025   22:11:59   ( -70.15,  23.23) 07/11/2025   22:12:47  ( -70.14,  23.29)    2.63                48
 07/11/2025   23:02:43   (  70.03,-169.27) 07/11/2025   23:02:14  (  70.04,-169.21)    2.37                29
 07/14/2025   13:38:27   (  70.97, -29.64) 07/14/2025   13:39:34  (  70.88, -27.36)   83.47                67
 07/14/2025   14:28:54   ( -70.09, 139.09) 07/14/2025   14:29:16  ( -70.12, 139.14)    3.21                22
 07/14/2025   15:19:38   (  69.98, -53.42) 07/14/2025   15:18:44  (  69.95, -53.45)    3.30                54
 07/17/2025   05:55:08   (  70.19,  87.40) 07/17/2025   05:56:15  (  70.17,  87.48)    3.30                67
 07/17/2025   06:45:49   ( -70.03,-105.05) 07/17/2025   06:45:46  ( -70.02,-105.11)    2.87                 3
 07/17/2025   07:36:28   (  69.66,  62.82) 07/17/2025   07:35:16  (  69.74,  62.14)   27.31                72
 07/19/2025   22:12:03   (  70.14,-156.76) 07/19/2025   22:12:44  (  70.11,-156.72)    3.17                41
 07/19/2025   23:02:45   ( -70.03,  10.72) 07/19/2025   23:02:14  ( -70.01,  10.77)    2.68                31