Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 17.  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)
 09/19/2023   22:32:14   (  -0.01,-136.99) (  -0.14,-137.52)   61.52                80
 09/20/2023   22:16:10   (  -0.01,-136.98) (   0.88,-133.00)  453.73                80
 09/22/2023   10:35:17   (   0.00,-136.96) (   0.31,-138.26)  148.82                80
 09/23/2023   10:19:13   (   0.00,-136.94) (  -0.71,-133.73)  365.68                80
 09/24/2023   22:38:29   (   0.00,-136.91) (  -0.48,-139.04)  242.56                80
 09/25/2023   22:22:25   (   0.00,-136.89) (   0.54,-134.51)  271.79                80
 09/27/2023   10:41:32   (   0.00,-136.87) (   0.64,-139.78)  331.48                80
 09/28/2023   10:22:46   (   0.00,-136.85) (  -0.33,-135.24)  182.75                80
 09/29/2023   22:44:43   (  -0.00,-136.81) (  -0.85,-140.55)  425.91                80
 09/30/2023   22:28:38   (  -0.00,-136.79) (   0.18,-136.02)   88.08                80