Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2024 4 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2024   10:17:46   (   0.01,-137.01) (  -0.68,-133.87)  357.12                80
 04/19/2024   22:42:22   (  -0.01,-136.99) (  -0.50,-139.17)  248.35                80
 04/20/2024   22:20:58   (  -0.01,-136.99) (   0.52,-134.64)  268.05                80
 04/22/2024   10:45:25   (   0.01,-137.00) (   0.68,-139.90)  331.27                80
 04/23/2024   10:24:01   (   0.01,-137.00) (  -0.35,-135.37)  184.76                80
 04/24/2024   22:48:37   (  -0.01,-136.97) (  -0.81,-140.68)  421.77                80
 04/25/2024   22:29:52   (   0.01,-136.96) (   0.17,-136.14)   93.47                80
 04/28/2024   10:32:54   (  -0.00,-136.93) (  -0.03,-136.87)    7.66                80
 04/30/2024   22:33:24   (  -0.00,-136.87) (  -0.17,-137.63)   85.93                80
 05/01/2024   22:17:19   (  -0.01,-136.85) (   0.83,-133.09)  428.70                80