Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 10.  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)
 07/11/2025   22:12:00   ( -70.16,  23.22) 07/11/2025   22:12:48  ( -70.14,  23.29)    3.41                48
 07/11/2025   23:02:44   (  70.04,-169.28) 07/11/2025   23:02:15  (  70.03,-169.22)    2.36                29
 07/14/2025   13:38:27   (  70.98, -29.64) 07/14/2025   13:39:34  (  70.88, -27.36)   83.58                67
 07/14/2025   14:28:54   ( -70.10, 139.09) 07/14/2025   14:29:16  ( -70.11, 139.14)    2.51                22
 07/14/2025   15:19:38   (  69.98, -53.43) 07/14/2025   15:18:43  (  70.00, -53.37)    3.27                55
 07/17/2025   05:55:07   (  70.13,  87.48) 07/17/2025   05:56:16  (  70.12,  87.40)    3.14                69
 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,  62.15)   27.28                72
 07/19/2025   22:12:03   (  70.13,-156.75) 07/19/2025   22:12:44  (  70.12,-156.71)    2.27                41
 07/19/2025   23:02:45   ( -70.03,  10.72) 07/19/2025   23:02:14  ( -70.02,  10.78)    2.39                31
 07/22/2025   13:38:27   ( -70.86, 150.55) 07/22/2025   13:39:35  ( -70.77, 152.50)   72.10                68
 07/22/2025   14:28:58   (  70.08, -40.91) 07/22/2025   14:29:13  (  70.05, -40.91)    3.52                15
 07/22/2025   15:19:40   ( -69.97, 126.58) 07/22/2025   15:18:43  ( -69.95, 126.58)    1.88                57