Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 9 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2023   17:18:54   ( -74.01,  88.96) 09/18/2023   17:17:48  ( -73.99,  85.98)   91.67                66
 09/18/2023   18:09:46   (  74.30,-104.45) 09/18/2023   18:08:35  (  74.32,-105.86)   42.44                71
 09/18/2023   19:00:36   ( -74.59,  62.08) 09/18/2023   18:59:34  ( -74.60,  62.15)    2.14                62
 09/18/2023   19:51:22   (  74.59,-130.61) 09/18/2023   19:50:28  (  74.60,-130.58)    1.10                54
 09/18/2023   20:42:06   ( -74.60,  36.69) 09/18/2023   20:41:33  ( -74.59,  36.63)    1.92                33
 09/18/2023   21:32:52   (  74.60,-155.99) 09/18/2023   21:32:27  (  74.59,-156.10)    3.05                25
 09/18/2023   22:23:37   ( -74.65,  11.17) 09/18/2023   22:23:31  ( -74.63,  11.25)    3.12                 6
 09/18/2023   23:14:23   (  74.65, 178.49) 09/18/2023   23:14:25  (  74.63, 178.52)    2.33                 2
 09/19/2023   00:05:07   ( -74.66, -14.21) 09/19/2023   00:05:29  ( -74.67, -14.13)    2.90                22
 09/19/2023   00:55:53   (  74.66, 153.10) 09/19/2023   00:56:23  (  74.67, 153.15)    2.23                30
 09/19/2023   01:46:37   ( -74.66, -39.60) 09/19/2023   01:47:28  ( -74.66, -39.65)    1.44                51
 09/19/2023   02:37:23   (  74.66, 127.71) 09/19/2023   02:38:22  (  74.66, 127.63)    2.51                59
 09/19/2023   03:28:11   ( -74.86, -65.51) 09/19/2023   03:29:24  ( -74.80, -64.75)   23.20                73
 09/19/2023   04:19:04   (  75.19, 100.84) 09/19/2023   04:20:11  (  75.12, 103.51)   76.65                67