Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 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)
 09/16/2023   10:50:27   (   0.00,-137.01) (   0.93,-141.29)  487.17                80
 09/17/2023   10:29:03   (   0.00,-137.01) (  -0.08,-136.76)   28.96                80
 09/19/2023   22:32:15   (  -0.00,-136.99) (  -0.10,-137.53)   61.68                80
 09/20/2023   22:16:10   (  -0.00,-136.98) (   0.92,-133.00)  453.54                80
 09/22/2023   10:37:58   (   0.00,-136.96) (   0.28,-138.27)  149.15                80
 09/23/2023   10:16:32   (   0.00,-136.94) (  -0.69,-133.73)  365.43                80
 09/24/2023   22:38:28   (  -0.00,-136.91) (  -0.50,-139.03)  242.51                80
 09/25/2023   22:22:24   (  -0.00,-136.89) (   0.53,-134.51)  271.82                80
 09/27/2023   10:44:11   (   0.01,-136.87) (   0.66,-139.78)  331.67                80
 09/28/2023   10:22:47   (   0.01,-136.85) (  -0.38,-135.25)  182.51                80