Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 9.  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)
 08/10/2023   10:44:07   (  -0.01,-137.01) (   0.62,-139.71)  308.64                80
 08/11/2023   10:22:41   (  -0.01,-137.00) (  -0.43,-135.18)  208.12                80
 08/12/2023   22:44:35   (   0.01,-137.00) (  -0.75,-140.48)  395.74                80
 08/13/2023   22:28:29   (   0.00,-137.00) (   0.24,-135.94)  120.87                80
 08/15/2023   10:50:14   (   0.00,-136.99) (   0.96,-141.20)  479.83                80
 08/16/2023   10:28:49   (   0.01,-136.98) (  -0.09,-136.67)   36.67                80
 08/18/2023   22:31:56   (  -0.01,-136.97) (  -0.13,-137.42)   51.84                80
 08/19/2023   22:15:50   (  -0.01,-136.96) (   0.93,-132.89)  464.27                80
 08/21/2023   10:37:35   (   0.01,-136.94) (   0.26,-138.15)  137.37                80
 08/22/2023   10:16:09   (   0.01,-136.93) (  -0.74,-133.61)  378.24                80