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)
 09/17/2023   10:29:02   (   0.01,-137.01) (  -0.03,-136.75)   29.11                80
 09/19/2023   22:32:15   (  -0.01,-136.99) (  -0.11,-137.53)   61.51                80
 09/20/2023   22:16:09   (  -0.02,-136.98) (   0.85,-132.99)  453.84                80
 09/22/2023   10:35:18   (   0.01,-136.96) (   0.29,-138.27)  148.68                80
 09/23/2023   10:19:13   (   0.01,-136.94) (  -0.74,-133.74)  365.78                80
 09/24/2023   22:38:30   (   0.00,-136.91) (  -0.46,-139.05)  242.71                80
 09/25/2023   22:22:24   (   0.00,-136.89) (   0.51,-134.50)  271.60                80
 09/27/2023   10:41:32   (  -0.00,-136.87) (   0.62,-139.79)  331.74                80
 09/28/2023   10:25:27   (  -0.00,-136.85) (  -0.35,-135.24)  182.47                80
 09/29/2023   22:44:43   (   0.00,-136.81) (  -0.83,-140.55)  426.20                80
 09/30/2023   22:28:39   (   0.00,-136.79) (   0.20,-136.02)   87.83                80