Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 2.  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)
 10/02/2025   14:28:36   ( -70.21, 138.99) 10/02/2025   14:29:48  ( -70.17, 139.17)    8.37                72
 10/02/2025   15:19:19   (  70.02, -53.40) 10/02/2025   15:19:16  (  70.01, -53.41)    0.96                 3
 10/02/2025   16:09:59   ( -69.85, 114.17) 10/02/2025   16:08:46  ( -69.89, 114.06)    6.06                73
 10/05/2025   06:45:26   ( -70.10,-105.05) 10/05/2025   06:46:16  ( -70.09,-105.04)    0.50                50
 10/05/2025   07:36:11   (  70.01,  62.39) 10/05/2025   07:35:43  (  69.99,  62.45)    3.33                28
 10/05/2025   08:26:35   ( -69.00,-128.82) 10/05/2025   08:25:28  ( -69.05,-131.18)   93.97                67
 10/07/2025   22:11:53   (  71.06,-158.13) 10/07/2025   22:12:58  (  70.96,-155.50)   96.16                65
 10/07/2025   23:02:16   ( -70.05,  10.81) 10/07/2025   23:02:41  ( -70.08,  10.83)    3.02                25
 10/07/2025   23:53:01   (  69.97, 178.25) 10/07/2025   23:52:08  (  69.97, 178.32)    2.90                53
 10/10/2025   14:28:26   (  70.14, -40.86) 10/10/2025   14:29:37  (  70.12, -40.85)    2.38                71
 10/10/2025   15:19:07   ( -70.02, 126.64) 10/10/2025   15:19:07  ( -70.01, 126.63)    1.64                 0
 10/10/2025   16:09:48   (  69.73, -65.61) 10/10/2025   16:08:36  (  69.78, -66.04)   17.75                72
 10/13/2025   06:45:16   (  70.07,  75.03) 10/13/2025   06:46:01  (  70.10,  75.03)    3.03                45
 10/13/2025   07:35:58   ( -70.01,-117.55) 10/13/2025   07:35:31  ( -69.99,-117.48)    2.96                27
 10/15/2025   22:11:38   ( -70.99,  22.04) 10/15/2025   22:12:44  ( -70.91,  24.50)   89.81                66
 10/15/2025   23:02:06   (  70.02,-169.10) 10/15/2025   23:02:25  (  70.03,-169.16)    2.47                19
 10/15/2025   23:52:47   ( -69.90,  -1.60) 10/15/2025   23:51:55  ( -69.92,  -1.68)    3.59                52