Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 22.  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)
 11/22/2025   06:45:13   ( -70.11,-104.98) 11/22/2025   06:46:21  ( -70.12,-105.03)    2.25                68
 11/22/2025   07:35:58   (  70.04,  62.43) 11/22/2025   07:35:48  (  70.02,  62.48)    2.54                10
 11/22/2025   08:26:34   ( -69.63,-129.64) 11/22/2025   08:25:22  ( -69.69,-130.35)   28.11                72
 11/24/2025   23:02:13   ( -70.08,  10.82) 11/24/2025   23:02:53  ( -70.06,  10.76)    2.41                40
 11/24/2025   23:52:57   (  69.96, 178.30) 11/24/2025   23:52:20  (  69.96, 178.26)    1.39                37
 11/27/2025   14:28:38   (  70.52, -41.45) 11/27/2025   14:29:49  (  70.42, -40.48)   37.82                71
 11/27/2025   15:19:13   ( -70.05, 126.61) 11/27/2025   15:19:24  ( -70.04, 126.60)    1.50                11
 11/27/2025   16:09:57   (  69.94, -65.92) 11/27/2025   16:08:51  (  69.93, -65.91)    1.45                66
 11/30/2025   06:45:30   (  70.09,  74.99) 11/30/2025   06:46:25  (  70.09,  74.92)    2.61                55
 11/30/2025   07:36:12   ( -69.98,-117.53) 11/30/2025   07:35:55  ( -69.99,-117.60)    2.87                17
 11/30/2025   08:26:42   (  69.13,  51.01) 11/30/2025   08:25:35  (  69.16,  48.93)   82.62                67
 12/02/2025   23:02:29   (  70.08,-169.25) 12/02/2025   23:02:54  (  70.07,-169.24)    2.10                25
 12/02/2025   23:53:11   ( -69.96,  -1.75) 12/02/2025   23:52:24  ( -69.96,  -1.75)    0.12                47
 12/05/2025   14:28:45   ( -70.17, 139.06) 12/05/2025   14:29:57  ( -70.13, 139.09)    4.23                72
 12/05/2025   15:19:28   (  70.03, -53.41) 12/05/2025   15:19:24  (  70.02, -53.43)    1.54                 4
 12/05/2025   16:10:08   ( -69.80, 114.25) 12/05/2025   16:08:55  ( -69.86, 113.99)   12.21                73