Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 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)
 06/08/2023   10:26:07   (  -0.00,-137.00) (  -0.39,-135.29)  195.80                80
 06/09/2023   22:45:23   (  -0.00,-137.00) (  -0.80,-140.59)  409.66                80
 06/10/2023   22:29:18   (  -0.01,-137.00) (   0.17,-136.05)  106.84                80
 06/12/2023   10:48:26   (   0.01,-137.00) (   0.95,-141.34)  493.14                80
 06/13/2023   10:32:21   (   0.01,-137.00) (  -0.03,-136.80)   22.93                80
 06/15/2023   22:32:53   (   0.00,-136.98) (  -0.12,-137.58)   68.15                80
 06/16/2023   22:16:47   (   0.00,-136.97) (   0.86,-133.04)  447.37                80
 06/18/2023   10:35:54   (  -0.01,-136.96) (   0.31,-138.31)  154.03                80
 06/19/2023   10:19:50   (  -0.00,-136.95) (  -0.73,-133.78)  361.19                80
 06/20/2023   22:39:05   (   0.00,-136.92) (  -0.49,-139.08)  246.60                80
 06/21/2023   22:23:00   (  -0.00,-136.91) (   0.49,-134.54)  268.53                80