Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 12 5.  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   15:50:41   ( -73.43, 112.27) 12/17/2023   15:49:35  ( -73.45, 109.22)   96.63                66
 12/17/2023   16:41:35   (  73.84, -81.40) 12/17/2023   16:40:23  (  73.86, -82.49)   34.04                72
 12/17/2023   17:32:24   ( -74.08,  85.35) 12/17/2023   17:31:20  ( -74.10,  85.37)    2.79                64
 12/17/2023   18:23:10   (  74.10,-107.39) 12/17/2023   18:22:17  (  74.08,-107.42)    1.93                53
 12/17/2023   19:13:55   ( -74.13,  59.84) 12/17/2023   19:13:18  ( -74.13,  59.95)    3.23                37
 12/17/2023   20:04:40   (  74.10,-132.77) 12/17/2023   20:04:15  (  74.11,-132.84)    2.18                25
 12/17/2023   20:55:25   ( -74.13,  34.46) 12/17/2023   20:55:16  ( -74.15,  34.53)    3.05                 9
 12/17/2023   21:46:11   (  74.15,-158.28) 12/17/2023   21:46:13  (  74.13,-158.26)    2.49                 2
 12/17/2023   22:36:55   ( -74.14,   9.07) 12/17/2023   22:37:15  ( -74.13,   8.98)    2.84                20
 12/17/2023   23:27:41   (  74.16, 176.33) 12/17/2023   23:28:11  (  74.16, 176.31)    0.54                30
 12/18/2023   00:18:26   ( -74.19, -16.44) 12/18/2023   00:19:13  ( -74.16, -16.44)    3.72                47
 12/18/2023   01:09:11   (  74.16, 150.94) 12/18/2023   01:10:09  (  74.19, 150.89)    2.80                58
 12/18/2023   01:59:56   ( -74.20, -41.82) 12/18/2023   02:01:11  ( -74.19, -41.86)    1.70                75
 12/18/2023   02:50:51   (  74.66, 124.28) 12/18/2023   02:51:59  (  74.59, 126.52)   66.43                68