Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 4.  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)
 05/04/2023   22:22:56   (  -0.00,-137.00) (   0.56,-134.47)  288.82                80
 05/06/2023   10:44:44   (   0.00,-137.00) (   0.64,-139.74)  313.08                80
 05/07/2023   10:23:21   (   0.00,-136.99) (  -0.40,-135.22)  201.99                80
 05/08/2023   22:45:18   (   0.00,-136.97) (  -0.78,-140.53)  405.47                80
 05/09/2023   22:29:14   (   0.00,-136.95) (   0.21,-135.99)  108.97                80
 05/11/2023   10:51:02   (  -0.00,-136.93) (   0.98,-141.27)  494.56                80
 05/12/2023   10:29:38   (  -0.01,-136.91) (  -0.07,-136.75)   19.86                80
 05/14/2023   22:32:50   (   0.00,-136.87) (  -0.16,-137.52)   74.56                80
 05/15/2023   22:16:47   (   0.01,-136.85) (   0.89,-133.00)  439.59                80
 05/17/2023   10:38:35   (  -0.01,-136.82) (   0.29,-138.27)  164.47                80