Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 9.  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   ( -70.28, -92.73) 07/09/2025   05:56:17  ( -70.26, -92.42)   11.60                71
 07/09/2025   06:45:48   (  70.04,  74.94) 07/09/2025   06:45:46  (  70.05,  74.92)    1.13                 2
 07/09/2025   07:36:29   ( -69.91,-117.54) 07/09/2025   07:35:16  ( -69.94,-117.61)    3.47                73
 07/11/2025   22:12:00   ( -70.16,  23.22) 07/11/2025   22:12:48  ( -70.14,  23.29)    3.42                48
 07/11/2025   23:02:44   (  70.04,-169.28) 07/11/2025   23:02:15  (  70.03,-169.22)    2.43                29
 07/14/2025   13:38:27   (  70.98, -29.64) 07/14/2025   13:39:34  (  70.87, -27.36)   83.66                67
 07/14/2025   14:28:54   ( -70.10, 139.09) 07/14/2025   14:29:16  ( -70.11, 139.13)    2.40                22
 07/14/2025   15:19:38   (  69.98, -53.43) 07/14/2025   15:18:43  (  70.00, -53.38)    2.93                55
 07/17/2025   05:55:07   (  70.14,  87.47) 07/17/2025   05:56:16  (  70.12,  87.40)    3.56                69
 07/17/2025   06:45:49   ( -70.04,-105.06) 07/17/2025   06:45:46  ( -70.02,-105.11)    3.30                 3
 07/17/2025   07:36:28   (  69.66,  62.81) 07/17/2025   07:35:16  (  69.74,  62.14)   27.00                72
 07/19/2025   22:12:02   (  70.09,-156.68) 07/19/2025   22:12:44  (  70.11,-156.72)    3.28                42
 07/19/2025   23:02:45   ( -70.03,  10.72) 07/19/2025   23:02:14  ( -70.01,  10.78)    3.06                31
 07/22/2025   13:38:27   ( -70.87, 150.53) 07/22/2025   13:39:35  ( -70.76, 152.49)   72.37                68
 07/22/2025   14:28:58   (  70.09, -40.92) 07/22/2025   14:29:12  (  70.10, -40.85)    2.86                14
 07/22/2025   15:19:39   ( -69.93, 126.64) 07/22/2025   15:18:43  ( -69.95, 126.57)    3.50                56