Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 8.  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)
 11/08/2025   23:01:41   ( -70.22,  10.72) 11/08/2025   23:02:53  ( -70.17,  10.91)    9.26                72
 11/08/2025   23:52:24   (  70.03, 178.33) 11/08/2025   23:52:21  (  70.01, 178.33)    1.66                 3
 11/09/2025   00:43:04   ( -69.85, -14.09) 11/09/2025   00:41:51  ( -69.90, -14.19)    6.92                73
 11/11/2025   15:18:40   ( -70.09, 126.68) 11/11/2025   15:19:24  ( -70.09, 126.68)    0.95                44
 11/11/2025   16:09:25   (  70.00, -65.89) 11/11/2025   16:08:51  (  69.99, -65.83)    2.65                34
 11/14/2025   06:45:08   (  70.62,  74.26) 11/14/2025   06:46:17  (  70.52,  75.55)   48.81                69
 11/14/2025   07:35:41   ( -70.06,-117.54) 11/14/2025   07:35:54  ( -70.03,-117.53)    3.32                13
 11/14/2025   08:26:25   (  69.93,  49.97) 11/14/2025   08:25:21  (  69.92,  49.96)    1.17                64
 11/16/2025   23:01:59   (  70.09,-169.15) 11/16/2025   23:02:53  (  70.09,-169.19)    1.62                54
 11/16/2025   23:52:41   ( -70.00,  -1.69) 11/16/2025   23:52:23  ( -69.99,  -1.70)    1.15                18
 11/17/2025   00:43:10   (  69.08, 166.95) 11/17/2025   00:42:03  (  69.16, 164.81)   85.22                67
 11/19/2025   14:28:32   ( -71.10, 137.66) 11/19/2025   14:29:38  ( -71.00, 140.40)   99.68                66
 11/19/2025   15:18:58   (  70.05, -53.33) 11/19/2025   15:19:20  (  70.06, -53.34)    2.24                22
 11/19/2025   16:09:40   ( -69.95, 114.14) 11/19/2025   16:08:50  ( -69.96, 114.15)    1.82                50
 11/22/2025   06:45:14   ( -70.12,-105.00) 11/22/2025   06:46:21  ( -70.12,-105.03)    1.09                67
 11/22/2025   07:35:58   (  70.01,  62.47) 11/22/2025   07:35:48  (  70.00,  62.45)    1.67                10
 11/22/2025   08:26:34   ( -69.59,-129.58) 11/22/2025   08:25:22  ( -69.68,-130.36)   31.77                72