Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 23.  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)
 05/23/2023   10:26:06   (  -0.00,-137.00) (  -0.37,-135.26)  198.39                80
 05/24/2023   22:45:23   (  -0.00,-136.99) (  -0.78,-140.57)  407.32                80
 05/25/2023   22:29:19   (  -0.01,-136.99) (   0.23,-136.04)  109.09                80
 05/27/2023   10:48:26   (   0.01,-137.00) (   0.98,-141.31)  490.87                80
 05/28/2023   10:32:22   (   0.01,-137.00) (  -0.04,-136.78)   25.28                80
 05/30/2023   22:32:53   (  -0.01,-136.98) (  -0.15,-137.56)   65.44                80
 05/31/2023   22:16:49   (  -0.01,-136.98) (   0.88,-133.03)  450.10                80
 06/02/2023   10:35:56   (   0.00,-136.97) (   0.32,-138.29)  151.53                80
 06/03/2023   10:19:52   (   0.00,-136.96) (  -0.70,-133.77)  363.38                80
 06/04/2023   22:39:08   (   0.01,-136.92) (  -0.49,-139.07)  245.26                80
 06/05/2023   22:23:04   (   0.00,-136.90) (   0.54,-134.54)  269.09                80