Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 17.  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)
 10/18/2025   15:18:59   (  70.05, -53.36) 10/18/2025   15:19:24  (  70.03, -53.41)    3.32                25
 10/18/2025   16:09:40   ( -69.95, 114.12) 10/18/2025   16:08:53  ( -69.97, 114.14)    2.94                47
 10/21/2025   06:45:10   ( -70.45,-105.50) 10/21/2025   06:46:21  ( -70.32,-104.75)   31.70                71
 10/21/2025   07:35:49   (  70.05,  62.43) 10/21/2025   07:35:51  (  70.05,  62.50)    2.56                 2
 10/21/2025   08:26:30   ( -69.94,-130.08) 10/21/2025   08:25:21  ( -69.94,-130.02)    2.45                69
 10/23/2025   23:01:54   ( -70.09,  10.86) 10/23/2025   23:02:53  ( -70.09,  10.81)    2.05                59
 10/23/2025   23:52:39   (  70.00, 178.30) 10/23/2025   23:52:20  (  69.98, 178.29)    2.04                19
 10/24/2025   00:43:09   ( -69.31, -13.36) 10/24/2025   00:41:59  ( -69.38, -14.89)   60.56                70
 10/26/2025   15:18:44   ( -70.04, 126.71) 10/26/2025   15:19:21  ( -70.05, 126.64)    2.98                37
 10/26/2025   16:09:29   (  69.96, -65.85) 10/26/2025   16:08:48  (  69.94, -65.88)    2.96                41
 10/29/2025   06:45:02   (  70.61,  74.30) 10/29/2025   06:46:12  (  70.46,  75.49)   47.00                70
 10/29/2025   07:35:34   ( -70.01,-117.44) 10/29/2025   07:35:48  ( -70.03,-117.50)    3.15                14
 10/29/2025   08:26:19   (  69.93,  49.98) 10/29/2025   08:25:15  (  69.91,  49.98)    2.19                64