Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 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)
 04/04/2023   10:45:18   (   0.02,-137.01) (   0.65,-139.82)  320.32                80
 04/05/2023   10:23:53   (   0.01,-137.01) (  -0.40,-135.29)  196.50                80
 04/06/2023   22:48:26   (  -0.01,-136.99) (  -0.83,-140.58)  408.91                80
 04/07/2023   22:27:00   (  -0.01,-136.99) (   0.22,-136.05)  107.48                80
 04/09/2023   10:51:26   (   0.01,-136.99) (   0.96,-141.31)  492.48                80
 04/10/2023   10:29:59   (   0.01,-136.97) (  -0.04,-136.77)   23.23                80
 04/12/2023   22:33:06   (  -0.02,-136.92) (  -0.16,-137.53)   68.78                80
 04/13/2023   22:17:00   (  -0.02,-136.91) (   0.85,-132.99)  446.34                80
 04/15/2023   10:38:45   (   0.03,-136.89) (   0.32,-138.25)  155.11                80
 04/16/2023   10:17:18   (   0.03,-136.87) (  -0.69,-133.71)  359.85                80
 04/17/2023   22:39:12   (  -0.03,-136.83) (  -0.50,-139.01)  248.12                80