Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 15.  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)
 11/15/2023   10:25:56   (   0.01,-137.01) (  -0.35,-135.38)  186.44                80
 11/16/2023   22:45:15   (  -0.01,-137.00) (  -0.82,-140.69)  419.79                80
 11/17/2023   22:29:11   (  -0.01,-137.00) (   0.20,-136.17)   95.86                80
 11/20/2023   10:32:16   (   0.01,-137.00) (   0.01,-136.91)   10.17                80
 11/22/2023   22:32:50   (  -0.00,-136.97) (  -0.19,-137.69)   81.86                80
 11/23/2023   22:16:46   (  -0.01,-136.97) (   0.84,-133.16)  433.39                80
 11/25/2023   10:35:56   (   0.01,-136.96) (   0.33,-138.44)  168.48                80
 11/26/2023   10:19:51   (   0.01,-136.95) (  -0.64,-133.90)  346.34                80
 11/27/2023   22:39:08   (  -0.01,-136.92) (  -0.55,-139.21)  261.82                80
 11/28/2023   22:23:05   (  -0.01,-136.90) (   0.49,-134.69)  252.56                80