Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 6.  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)
 06/07/2023   10:44:52   (  -0.01,-137.01) (   0.61,-139.82)  320.42                80
 06/08/2023   10:26:06   (   0.00,-137.01) (  -0.36,-135.28)  196.16                80
 06/09/2023   22:45:23   (  -0.01,-137.00) (  -0.83,-140.58)  409.63                80
 06/10/2023   22:29:18   (  -0.01,-137.00) (   0.20,-136.06)  106.83                80
 06/12/2023   10:48:26   (   0.01,-137.00) (   0.98,-141.33)  492.86                80
 06/13/2023   10:32:21   (   0.01,-137.00) (  -0.05,-136.80)   23.27                80
 06/15/2023   22:32:52   (  -0.00,-136.98) (  -0.15,-137.57)   68.07                80
 06/16/2023   22:16:47   (  -0.00,-136.97) (   0.89,-133.04)  447.46                80
 06/18/2023   10:35:55   (  -0.00,-136.96) (   0.29,-138.31)  153.72                80
 06/19/2023   10:19:49   (   0.00,-136.95) (  -0.69,-133.78)  361.49                80