Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 7.  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)
 11/07/2023   22:16:30   (   0.00,-137.00) (   0.88,-133.10)  444.96                80
 11/09/2023   10:38:19   (   0.00,-137.01) (   0.31,-138.37)  156.12                80
 11/10/2023   10:16:56   (   0.00,-137.00) (  -0.70,-133.85)  359.47                80
 11/11/2023   22:38:54   (   0.00,-136.99) (  -0.48,-139.16)  247.02                80
 11/12/2023   22:22:51   (   0.00,-136.98) (   0.54,-134.64)  268.14                80
 11/14/2023   10:44:40   (  -0.00,-136.97) (   0.64,-139.91)  334.35                80
 11/15/2023   10:23:16   (   0.00,-136.96) (  -0.33,-135.37)  180.15                80
 11/16/2023   22:45:14   (  -0.00,-136.93) (  -0.82,-140.69)  428.19                80
 11/17/2023   22:29:09   (  -0.00,-136.91) (   0.15,-136.15)   85.88                80
 11/20/2023   10:32:15   (  -0.01,-136.86) (  -0.02,-136.91)    5.44                80