Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 11.  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)
 06/12/2023   10:48:25   (   0.01,-137.00) (   0.99,-141.33)  493.28                80
 06/13/2023   10:32:21   (   0.01,-137.00) (  -0.05,-136.80)   22.75                80
 06/15/2023   22:32:53   (   0.02,-136.97) (  -0.10,-137.58)   68.81                80
 06/16/2023   22:16:47   (   0.02,-136.96) (   0.88,-133.04)  446.68                80
 06/18/2023   10:35:55   (  -0.02,-136.95) (   0.29,-138.31)  154.88                80
 06/19/2023   10:19:49   (  -0.01,-136.94) (  -0.69,-133.77)  360.34                80
 06/20/2023   22:39:05   (   0.01,-136.91) (  -0.48,-139.08)  247.11                80
 06/21/2023   22:23:00   (  -0.00,-136.90) (   0.51,-134.55)  267.97                80
 06/23/2023   10:42:07   (   0.01,-136.88) (   0.66,-139.82)  334.21                80
 06/24/2023   10:26:02   (   0.01,-136.87) (  -0.33,-135.28)  180.62                80