Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 21.  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)
 05/22/2023   10:42:11   (  -0.01,-136.99) (   0.63,-139.79)  319.34                80
 05/23/2023   10:26:06   (  -0.00,-136.98) (  -0.38,-135.26)  196.23                80
 05/24/2023   22:45:22   (  -0.00,-136.97) (  -0.83,-140.56)  410.56                80
 05/25/2023   22:29:18   (  -0.01,-136.96) (   0.19,-136.03)  104.78                80
 05/27/2023   10:48:26   (   0.01,-136.94) (   0.96,-141.31)  497.31                80
 05/28/2023   10:32:21   (   0.01,-136.93) (   0.00,-136.77)   18.10                80
 05/30/2023   22:32:54   (  -0.01,-136.89) (  -0.13,-137.56)   75.09                80
 05/31/2023   22:16:48   (  -0.01,-136.88) (   0.84,-133.02)  439.49                80
 06/02/2023   10:35:56   (  -0.00,-136.85) (   0.30,-138.30)  164.26                80
 06/03/2023   10:19:51   (  -0.00,-136.83) (  -0.67,-133.76)  349.62                80