Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 9 14.  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   ( -74.02,  88.93) 09/18/2023   17:17:47  ( -74.02,  86.06)   87.69                67
 09/18/2023   18:09:46   (  74.31,-104.50) 09/18/2023   18:08:35  (  74.30,-105.91)   42.39                71
 09/18/2023   19:00:35   ( -74.56,  62.17) 09/18/2023   18:59:34  ( -74.59,  62.11)    3.29                61
 09/18/2023   19:51:22   (  74.61,-130.66) 09/18/2023   19:50:28  (  74.58,-130.63)    3.53                54
 09/18/2023   20:42:06   ( -74.61,  36.65) 09/18/2023   20:41:32  ( -74.63,  36.73)    2.49                34
 09/18/2023   21:32:52   (  74.62,-156.04) 09/18/2023   21:32:26  (  74.62,-156.01)    1.05                26
 09/18/2023   22:23:36   ( -74.62,  11.27) 09/18/2023   22:23:31  ( -74.62,  11.21)    1.65                 5
 09/18/2023   23:14:22   (  74.62, 178.57) 09/18/2023   23:14:25  (  74.61, 178.47)    2.97                 3
 09/19/2023   00:05:07   ( -74.67, -14.25) 09/19/2023   00:05:29  ( -74.66, -14.17)    2.92                22
 09/19/2023   00:55:53   (  74.67, 153.05) 09/19/2023   00:56:23  (  74.65, 153.09)    2.74                30
 09/19/2023   01:46:37   ( -74.68, -39.64) 09/19/2023   01:47:27  ( -74.70, -39.55)    3.34                50
 09/19/2023   02:37:23   (  74.68, 127.66) 09/19/2023   02:38:21  (  74.69, 127.71)    2.08                58
 09/19/2023   03:28:11   ( -74.87, -65.56) 09/19/2023   03:29:23  ( -74.83, -64.66)   26.62                72
 09/19/2023   04:19:03   (  75.16, 100.92) 09/19/2023   04:20:10  (  75.15, 103.60)   76.37                67