Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 9 8.  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   ( -74.00,  88.98) 09/18/2023   17:17:48  ( -73.98,  85.96)   92.59                66
 09/18/2023   18:09:46   (  74.30,-104.47) 09/18/2023   18:08:35  (  74.31,-105.90)   43.17                71
 09/18/2023   19:00:36   ( -74.59,  62.09) 09/18/2023   18:59:34  ( -74.59,  62.13)    1.19                62
 09/18/2023   19:51:22   (  74.60,-130.62) 09/18/2023   19:50:28  (  74.58,-130.62)    1.60                54
 09/18/2023   20:42:06   ( -74.59,  36.71) 09/18/2023   20:41:33  ( -74.59,  36.62)    2.87                33
 09/18/2023   21:32:52   (  74.60,-156.01) 09/18/2023   21:32:26  (  74.62,-156.00)    2.34                26
 09/18/2023   22:23:37   ( -74.65,  11.19) 09/18/2023   22:23:31  ( -74.62,  11.23)    2.70                 6
 09/18/2023   23:14:22   (  74.61, 178.61) 09/18/2023   23:14:25  (  74.62, 178.48)    3.78                 3
 09/19/2023   00:05:07   ( -74.65, -14.19) 09/19/2023   00:05:29  ( -74.66, -14.15)    2.09                22
 09/19/2023   00:55:53   (  74.66, 153.09) 09/19/2023   00:56:23  (  74.66, 153.11)    0.61                30
 09/19/2023   01:46:37   ( -74.65, -39.58) 09/19/2023   01:47:28  ( -74.66, -39.66)    2.37                51
 09/19/2023   02:37:23   (  74.66, 127.70) 09/19/2023   02:38:21  (  74.69, 127.73)    3.55                58
 09/19/2023   03:28:11   ( -74.85, -65.50) 09/19/2023   03:29:24  ( -74.79, -64.77)   22.31                73
 09/19/2023   04:19:03   (  75.15, 100.97) 09/19/2023   04:20:11  (  75.11, 103.47)   71.67                68