Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 22.  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)
 05/22/2023   10:42:10   (  -0.01,-136.99) (   0.64,-139.79)  319.33                80
 05/23/2023   10:26:06   (   0.00,-136.98) (  -0.37,-135.26)  196.19                80
 05/24/2023   22:45:22   (  -0.00,-136.96) (  -0.84,-140.56)  410.64                80
 05/25/2023   22:29:18   (  -0.01,-136.95) (   0.17,-136.03)  104.67                80
 05/27/2023   10:48:26   (   0.01,-136.94) (   0.97,-141.31)  497.57                80
 05/28/2023   10:32:22   (   0.01,-136.93) (  -0.04,-136.78)   17.66                80
 05/30/2023   22:32:53   (  -0.01,-136.89) (  -0.14,-137.56)   75.44                80
 05/31/2023   22:16:48   (  -0.01,-136.87) (   0.82,-133.02)  439.05                80
 06/02/2023   10:35:56   (   0.00,-136.85) (   0.32,-138.29)  164.84                80
 06/03/2023   10:19:52   (   0.00,-136.82) (  -0.71,-133.77)  348.98                80
 06/04/2023   22:39:08   (   0.01,-136.78) (  -0.48,-139.07)  260.78                80