Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 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)
 06/09/2023   22:45:23   (  -0.00,-137.00) (  -0.81,-140.59)  409.72                80
 06/10/2023   22:29:19   (  -0.01,-137.00) (   0.22,-136.06)  106.76                80
 06/12/2023   10:48:26   (   0.00,-137.00) (   0.95,-141.33)  493.26                80
 06/13/2023   10:29:41   (   0.01,-137.00) (  -0.02,-136.79)   22.88                80
 06/15/2023   22:32:52   (   0.01,-136.98) (  -0.12,-137.58)   68.20                80
 06/16/2023   22:16:47   (   0.01,-136.97) (   0.86,-133.04)  447.32                80
 06/18/2023   10:35:54   (  -0.01,-136.96) (   0.32,-138.31)  154.15                80
 06/19/2023   10:19:50   (  -0.00,-136.95) (  -0.72,-133.78)  361.07                80
 06/20/2023   22:39:05   (   0.01,-136.92) (  -0.50,-139.08)  246.66                80
 06/21/2023   22:23:01   (  -0.00,-136.91) (   0.54,-134.55)  268.47                80