Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 12 15.  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   16:41:36   (  73.82, -81.34) 12/17/2023   16:40:25  (  73.83, -82.59)   38.72                71
 12/17/2023   17:32:26   ( -74.11,  85.26) 12/17/2023   17:31:21  ( -74.11,  85.38)    3.59                65
 12/17/2023   18:23:12   (  74.12,-107.45) 12/17/2023   18:22:18  (  74.10,-107.39)    3.07                54
 12/17/2023   19:13:56   ( -74.11,  59.88) 12/17/2023   19:13:20  ( -74.09,  59.84)    3.03                36
 12/17/2023   20:04:42   (  74.12,-132.84) 12/17/2023   20:04:16  (  74.12,-132.81)    0.83                26
 12/17/2023   20:55:26   ( -74.12,  34.49) 12/17/2023   20:55:18  ( -74.12,  34.42)    2.40                 8
 12/17/2023   21:46:12   (  74.13,-158.22) 12/17/2023   21:46:14  (  74.15,-158.23)    2.57                 2
 12/17/2023   22:36:57   ( -74.17,   8.99) 12/17/2023   22:37:16  ( -74.14,   9.00)    3.08                19
 12/17/2023   23:27:42   (  74.18, 176.27) 12/17/2023   23:28:11  (  74.18, 176.35)    2.40                29
 12/18/2023   00:18:26   ( -74.18, -16.40) 12/18/2023   00:19:13  ( -74.17, -16.42)    0.94                47
 12/18/2023   01:09:12   (  74.19, 150.89) 12/18/2023   01:10:09  (  74.20, 150.93)    2.38                57
 12/18/2023   01:59:57   ( -74.23, -41.91) 12/18/2023   02:01:11  ( -74.20, -41.84)    3.93                74
 12/18/2023   02:50:51   (  74.63, 124.35) 12/18/2023   02:52:00  (  74.56, 126.43)   61.71                69