Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 13.  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)
 11/14/2025   06:45:08   (  70.61,  74.28) 11/14/2025   06:46:18  (  70.47,  75.47)   46.53                70
 11/14/2025   07:35:41   ( -70.06,-117.53) 11/14/2025   07:35:54  ( -70.03,-117.54)    3.30                13
 11/14/2025   08:26:25   (  69.92,  49.98) 11/14/2025   08:25:21  (  69.92,  49.96)    1.00                64
 11/16/2025   23:01:58   (  70.09,-169.15) 11/16/2025   23:02:51  (  70.11,-169.17)    2.14                53
 11/16/2025   23:52:40   ( -70.00,  -1.70) 11/16/2025   23:52:21  ( -70.00,  -1.69)    0.73                19
 11/17/2025   00:43:09   (  69.08, 166.95) 11/17/2025   00:42:02  (  69.12, 164.76)   87.05                67
 11/19/2025   14:28:31   ( -71.07, 137.71) 11/19/2025   14:29:37  ( -70.95, 140.34)   95.91                66
 11/19/2025   15:18:58   (  70.06, -53.35) 11/19/2025   15:19:18  (  70.08, -53.32)    2.16                20
 11/19/2025   16:09:40   ( -69.97, 114.10) 11/19/2025   16:08:48  ( -69.97, 114.16)    2.22                52
 11/22/2025   06:45:13   ( -70.11,-104.99) 11/22/2025   06:46:18  ( -70.11,-105.03)    1.62                65
 11/22/2025   07:35:57   (  70.00,  62.49) 11/22/2025   07:35:45  (  69.99,  62.46)    1.64                12
 11/22/2025   08:26:32   ( -69.53,-129.49) 11/22/2025   08:25:21  ( -69.56,-130.51)   39.74                71
 11/24/2025   23:02:12   ( -70.06,  10.85) 11/24/2025   23:02:43  ( -70.08,  10.84)    2.43                31
 11/24/2025   23:52:56   (  69.96, 178.32) 11/24/2025   23:52:10  (  69.96, 178.31)    0.98                46
 11/27/2025   14:28:28   (  70.14, -40.83) 11/27/2025   14:29:36  (  70.16, -40.78)    2.81                68
 11/27/2025   15:19:10   ( -70.03, 126.66) 11/27/2025   15:19:07  ( -70.00, 126.62)    3.16                 3
 11/27/2025   16:09:49   (  69.66, -65.49) 11/27/2025   16:08:37  (  69.71, -66.13)   25.37                72