Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 12.  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)
 10/13/2025   06:45:17   (  70.11,  74.97) 10/13/2025   06:46:23  (  70.13,  74.98)    2.82                66
 10/13/2025   07:35:58   ( -70.00,-117.55) 10/13/2025   07:35:53  ( -70.02,-117.54)    2.08                 5
 10/13/2025   08:26:37   (  69.59,  50.38) 10/13/2025   08:25:25  (  69.64,  49.57)   31.58                72
 10/15/2025   23:02:08   (  70.09,-169.20) 10/15/2025   23:02:53  (  70.11,-169.17)    3.27                45
 10/15/2025   23:52:49   ( -69.98,  -1.72) 10/15/2025   23:52:23  ( -70.01,  -1.69)    3.13                26
 10/18/2025   15:18:59   (  70.07, -53.39) 10/18/2025   15:19:23  (  70.06, -53.36)    1.71                24
 10/18/2025   16:09:40   ( -69.96, 114.09) 10/18/2025   16:08:53  ( -69.96, 114.12)    1.28                47
 10/21/2025   06:45:10   ( -70.42,-105.45) 10/21/2025   06:46:22  ( -70.31,-104.76)   28.05                72
 10/21/2025   07:35:49   (  70.02,  62.48) 10/21/2025   07:35:52  (  70.04,  62.49)    2.25                 3
 10/21/2025   08:26:30   ( -69.90,-130.03) 10/21/2025   08:25:22  ( -69.93,-130.03)    3.50                68
 10/23/2025   23:01:54   ( -70.10,  10.83) 10/23/2025   23:02:53  ( -70.10,  10.81)    1.09                59
 10/23/2025   23:52:38   (  69.97, 178.35) 10/23/2025   23:52:20  (  69.98, 178.29)    2.43                18
 10/24/2025   00:43:09   ( -69.32, -13.39) 10/24/2025   00:41:59  ( -69.38, -14.89)   59.32                70
 10/26/2025   15:18:44   ( -70.06, 126.69) 10/26/2025   15:19:21  ( -70.07, 126.66)    1.49                37
 10/26/2025   16:09:28   (  69.93, -65.80) 10/26/2025   16:08:48  (  69.95, -65.86)    3.07                40