Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 28.  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) (  -0.09,-137.46)   53.47                80
 04/29/2023   22:16:37   (  -0.00,-136.99) (   0.89,-132.93)  462.19                80
 05/01/2023   10:38:27   (   0.00,-136.99) (   0.26,-138.21)  139.14                80
 05/02/2023   10:17:02   (   0.00,-136.98) (  -0.72,-133.68)  376.27                80
 05/03/2023   22:39:00   (   0.00,-136.97) (  -0.46,-138.99)  230.78                80
 05/04/2023   22:22:55   (   0.00,-136.96) (   0.53,-134.46)  284.22                80
 05/06/2023   10:44:44   (  -0.00,-136.95) (   0.60,-139.74)  318.43                80
 05/07/2023   10:23:20   (  -0.00,-136.93) (  -0.39,-135.21)  195.84                80
 05/08/2023   22:45:17   (   0.01,-136.89) (  -0.77,-140.53)  413.25                80
 05/09/2023   22:29:13   (   0.02,-136.87) (   0.23,-135.99)  100.32                80