Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 6.  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)
 04/06/2025   22:11:36   ( -70.90,  22.24) 04/06/2025   22:12:44  ( -70.78,  24.11)   69.45                68
 04/06/2025   23:02:07   (  70.13,-169.22) 04/06/2025   23:02:21  (  70.13,-169.20)    0.82                14
 04/06/2025   23:52:49   ( -70.02,  -1.73) 04/06/2025   23:51:51  ( -70.02,  -1.72)    1.00                58
 04/09/2025   14:28:14   ( -70.19, 139.15) 04/09/2025   14:29:25  ( -70.22, 139.14)    2.62                71
 04/09/2025   15:18:58   (  70.11, -53.41) 04/09/2025   15:18:52  (  70.11, -53.36)    1.89                 6
 04/09/2025   16:09:37   ( -69.84, 114.32) 04/09/2025   16:08:24  ( -69.90, 113.97)   15.06                73
 04/12/2025   06:45:05   ( -70.19,-105.05) 04/12/2025   06:45:56  ( -70.20,-105.02)    1.46                51
 04/12/2025   07:35:48   (  70.06,  62.46) 04/12/2025   07:35:23  (  70.08,  62.47)    2.75                25
 04/12/2025   08:26:15   ( -69.14,-128.89) 04/12/2025   08:25:08  ( -69.16,-131.16)   89.72                67
 04/14/2025   23:01:55   ( -70.14,  10.80) 04/14/2025   23:02:27  ( -70.17,  10.81)    2.62                32
 04/14/2025   23:52:39   (  70.07, 178.23) 04/14/2025   23:51:54  (  70.05, 178.29)    3.18                45
 04/17/2025   14:28:11   (  70.72, -41.63) 04/17/2025   14:29:20  (  70.61, -40.30)   50.25                69
 04/17/2025   15:18:44   ( -70.11, 126.64) 04/17/2025   15:18:57  ( -70.13, 126.63)    2.29                13
 04/17/2025   16:09:27   (  69.99, -65.86) 04/17/2025   16:08:24  (  70.02, -65.89)    3.05                63