Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 8.  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)
 10/08/2023   10:37:53   (  -0.02,-137.00) (   0.28,-138.26)  144.42                80
 10/09/2023   10:16:28   (  -0.02,-136.99) (  -0.78,-133.74)  371.66                80
 10/10/2023   22:38:23   (   0.02,-136.98) (  -0.42,-139.03)  233.19                80
 10/11/2023   22:22:18   (   0.02,-136.98) (   0.58,-134.50)  282.88                80
 10/13/2023   10:44:04   (  -0.02,-136.96) (   0.60,-139.76)  318.59                80
 10/14/2023   10:25:19   (  -0.01,-136.96) (  -0.41,-135.23)  197.18                80
 10/15/2023   22:44:33   (  -0.00,-136.94) (  -0.83,-140.52)  408.27                80
 10/16/2023   22:28:28   (  -0.02,-136.92) (   0.19,-135.98)  107.38                80
 10/18/2023   10:50:14   (   0.02,-136.90) (   0.98,-141.25)  495.61                80
 10/19/2023   10:28:48   (   0.02,-136.87) (  -0.05,-136.72)   19.04                80
 10/21/2023   22:31:57   (  -0.01,-136.81) (  -0.14,-137.48)   75.02                80