Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 27.  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)
 04/28/2023   22:32:42   (  -0.00,-136.99) (  -0.11,-137.46)   53.53                80
 04/29/2023   22:16:38   (  -0.00,-136.99) (   0.92,-132.94)  462.11                80
 05/01/2023   10:35:46   (   0.00,-136.99) (   0.29,-138.21)  139.11                80
 05/02/2023   10:19:43   (   0.00,-136.99) (  -0.75,-133.69)  376.31                80
 05/03/2023   22:39:00   (  -0.00,-136.97) (  -0.44,-139.00)  230.87                80
 05/04/2023   22:22:56   (  -0.00,-136.96) (   0.54,-134.46)  284.11                80
 05/06/2023   10:42:05   (  -0.00,-136.95) (   0.60,-139.75)  318.47                80
 05/07/2023   10:26:01   (  -0.00,-136.93) (  -0.39,-135.21)  195.77                80
 05/08/2023   22:45:18   (   0.01,-136.90) (  -0.79,-140.53)  413.50                80
 05/09/2023   22:29:13   (   0.02,-136.87) (   0.20,-135.99)  100.07                80