Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 25.  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)
 12/26/2022   23:02:09   (  70.13,-169.12) 12/26/2022   23:02:55  (  70.12,-169.16)    2.08                46
 12/26/2022   23:52:51   ( -70.05,  -1.67) 12/26/2022   23:52:24  ( -70.07,  -1.60)    3.49                27
 12/29/2022   15:19:04   (  70.12, -53.33) 12/29/2022   15:19:26  (  70.08, -53.34)    3.54                22
 12/29/2022   16:09:45   ( -69.97, 114.20) 12/29/2022   16:08:56  ( -69.98, 114.15)    2.25                49
 01/01/2023   06:45:17   ( -70.32,-105.20) 01/01/2023   06:46:28  ( -70.25,-104.87)   14.63                71
 01/01/2023   07:35:58   (  70.05,  62.53) 01/01/2023   07:35:56  (  70.09,  62.54)    3.57                 2
 01/01/2023   08:26:40   ( -69.96,-130.02) 01/01/2023   08:25:26  ( -69.98,-129.97)    3.11                74
 01/03/2023   23:02:09   ( -70.16,  10.82) 01/03/2023   23:03:00  ( -70.13,  10.83)    3.36                51
 01/03/2023   23:52:52   (  70.00, 178.38) 01/03/2023   23:52:27  (  70.01, 178.31)    3.13                25
 01/04/2023   00:43:18   ( -69.05, -12.95) 01/04/2023   00:42:11  ( -69.14, -15.23)   91.41                67
 01/06/2023   15:19:02   ( -70.10, 126.67) 01/06/2023   15:19:29  ( -70.09, 126.66)    1.20                27
 01/06/2023   16:09:46   (  70.00, -65.86) 01/06/2023   16:08:56  (  69.97, -65.87)    2.49                50