Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 12.  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)
 11/12/2023   22:22:51   (  -0.01,-137.00) (   0.52,-134.63)  270.66                80
 11/14/2023   10:42:00   (   0.01,-137.02) (   0.67,-139.90)  328.94                80
 11/15/2023   10:25:56   (   0.02,-137.02) (  -0.35,-135.38)  187.16                80
 11/16/2023   22:45:15   (  -0.01,-137.01) (  -0.82,-140.69)  419.24                80
 11/17/2023   22:29:11   (  -0.01,-137.01) (   0.20,-136.17)   96.35                80
 11/20/2023   10:29:36   (   0.01,-137.00) (   0.01,-136.91)   10.61                80
 11/22/2023   22:32:50   (  -0.00,-136.98) (  -0.19,-137.69)   81.64                80
 11/23/2023   22:16:46   (  -0.00,-136.97) (   0.84,-133.16)  433.56                80
 11/25/2023   10:35:56   (   0.01,-136.96) (   0.33,-138.44)  168.33                80