Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 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)
 05/07/2023   10:23:20   (   0.00,-136.99) (  -0.39,-135.21)  202.43                80
 05/08/2023   22:45:18   (   0.00,-136.97) (  -0.79,-140.52)  404.39                80
 05/09/2023   22:29:13   (   0.00,-136.96) (   0.20,-135.99)  110.31                80
 05/11/2023   10:51:02   (  -0.00,-136.94) (   0.98,-141.26)  493.10                80
 05/12/2023   10:29:38   (  -0.01,-136.93) (  -0.08,-136.75)   21.56                80
 05/14/2023   22:32:50   (   0.00,-136.89) (  -0.15,-137.52)   71.92                80
 05/15/2023   22:16:45   (   0.00,-136.87) (   0.85,-132.99)  442.48                80
 05/17/2023   10:38:34   (  -0.01,-136.85) (   0.32,-138.26)  161.37                80
 05/18/2023   10:17:09   (  -0.01,-136.83) (  -0.69,-133.73)  352.53                80
 05/19/2023   22:39:07   (   0.02,-136.79) (  -0.46,-139.05)  256.37                80
 05/20/2023   22:23:02   (   0.02,-136.77) (   0.55,-134.52)  257.20                80