Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 12 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)
 12/17/2023   15:50:42   ( -73.45, 112.21) 12/17/2023   15:49:36  ( -73.42, 109.14)   97.41                66
 12/17/2023   16:41:36   (  73.85, -81.43) 12/17/2023   16:40:24  (  73.84, -82.56)   34.94                72
 12/17/2023   17:32:25   ( -74.10,  85.29) 12/17/2023   17:31:21  ( -74.07,  85.29)    2.78                64
 12/17/2023   18:23:11   (  74.11,-107.42) 12/17/2023   18:22:17  (  74.11,-107.35)    2.07                54
 12/17/2023   19:13:55   ( -74.10,  59.91) 12/17/2023   19:13:19  ( -74.10,  59.86)    1.27                36
 12/17/2023   20:04:41   (  74.11,-132.80) 12/17/2023   20:04:15  (  74.14,-132.77)    3.14                26
 12/17/2023   20:55:25   ( -74.11,  34.52) 12/17/2023   20:55:17  ( -74.13,  34.44)    3.27                 8
 12/17/2023   21:46:12   (  74.16,-158.31) 12/17/2023   21:46:13  (  74.16,-158.20)    3.52                 1
 12/17/2023   22:36:56   ( -74.16,   9.01) 12/17/2023   22:37:15  ( -74.15,   9.02)    0.70                19
 12/17/2023   23:27:42   (  74.17, 176.30) 12/17/2023   23:28:12  (  74.14, 176.25)    3.24                30
 12/18/2023   00:18:26   ( -74.16, -16.37) 12/18/2023   00:19:13  ( -74.18, -16.40)    2.05                47
 12/18/2023   01:09:12   (  74.17, 150.92) 12/18/2023   01:10:10  (  74.17, 150.83)    2.61                58
 12/18/2023   01:59:57   ( -74.22, -41.88) 12/18/2023   02:01:11  ( -74.21, -41.82)    2.23                74
 12/18/2023   02:50:51   (  74.61, 124.39) 12/18/2023   02:52:00  (  74.58, 126.46)   61.50                69