Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 31.  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)
 10/31/2025   23:01:42   (  70.12,-169.13) 10/31/2025   23:02:47  (  70.14,-169.11)    2.43                65
 10/31/2025   23:52:23   ( -70.00,  -1.64) 10/31/2025   23:52:17  ( -70.03,  -1.63)    2.68                 6
 11/01/2025   00:43:01   (  69.55, 166.35) 11/01/2025   00:41:50  (  69.59, 165.41)   36.75                71
 11/03/2025   15:18:32   (  70.11, -53.33) 11/03/2025   15:19:19  (  70.11, -53.28)    1.75                47
 11/03/2025   16:09:13   ( -69.99, 114.17) 11/03/2025   16:08:49  ( -70.00, 114.20)    1.85                24
 11/06/2025   07:35:21   (  70.06,  62.55) 11/06/2025   07:35:51  (  70.05,  62.51)    1.42                30
 11/06/2025   08:26:02   ( -69.93,-129.94) 11/06/2025   08:25:21  ( -69.95,-130.00)    2.72                41
 11/08/2025   23:01:36   ( -70.71,  10.00) 11/08/2025   23:02:45  ( -70.63,  11.58)   59.00                69
 11/08/2025   23:52:09   (  70.02, 178.41) 11/08/2025   23:52:21  (  70.02, 178.35)    2.43                12
 11/09/2025   00:42:51   ( -69.94, -14.16) 11/09/2025   00:41:51  ( -69.92, -14.16)    1.86                60
 11/11/2025   15:18:15   ( -70.15, 126.69) 11/11/2025   15:19:24  ( -70.13, 126.74)    2.48                69
 11/11/2025   16:08:59   (  70.04, -65.83) 11/11/2025   16:08:51  (  70.02, -65.78)    2.78                 8
 11/11/2025   16:59:36   ( -69.69, 102.01) 11/11/2025   16:58:24  ( -69.76, 101.48)   21.73                72
 11/14/2025   07:35:04   ( -70.12,-117.46) 11/14/2025   07:35:54  ( -70.10,-117.43)    2.42                50
 11/14/2025   08:25:47   (  69.96,  50.09) 11/14/2025   08:25:21  (  69.98,  50.05)    2.82                26