Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 6 17.  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)
 06/21/2023   18:29:29   ( -74.58,  70.00) 06/21/2023   18:28:22  ( -74.60,  67.32)   79.26                67
 06/21/2023   19:20:25   (  75.08,-124.06) 06/21/2023   19:19:15  (  75.06,-124.08)    2.11                70
 06/21/2023   20:11:09   ( -75.07,  43.28) 06/21/2023   20:10:11  ( -75.07,  43.22)    1.71                58
 06/21/2023   21:01:55   (  75.08,-149.46) 06/21/2023   21:01:13  (  75.11,-149.42)    2.86                42
 06/21/2023   21:52:40   ( -75.12,  17.75) 06/21/2023   21:52:09  ( -75.12,  17.88)    3.62                31
 06/21/2023   22:43:25   (  75.09,-174.85) 06/21/2023   22:43:12  (  75.11,-174.91)    2.92                13
 06/21/2023   23:34:10   ( -75.13,  -7.64) 06/21/2023   23:34:08  ( -75.12,  -7.61)    1.11                 2
 06/22/2023   00:24:56   (  75.14, 159.62) 06/22/2023   00:25:11  (  75.11, 159.60)    3.42                15
 06/22/2023   01:15:40   ( -75.13, -33.03) 06/22/2023   01:16:07  ( -75.12, -33.10)    2.18                27
 06/22/2023   02:06:26   (  75.15, 134.23) 06/22/2023   02:07:09  (  75.16, 134.26)    1.64                43
 06/22/2023   02:57:10   ( -75.14, -58.42) 06/22/2023   02:58:05  ( -75.17, -58.44)    3.62                55
 06/22/2023   03:47:56   (  75.16, 108.84) 06/22/2023   03:49:08  (  75.16, 108.78)    2.01                72
 06/22/2023   04:38:48   ( -75.52, -84.95) 06/22/2023   04:39:57  ( -75.49, -82.89)   57.36                69