Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 7.  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)
 07/07/2023   22:22:52   (   0.01,-137.00) (   0.57,-134.54)  280.74                80
 07/09/2023   10:44:39   (  -0.01,-137.00) (   0.63,-139.80)  319.83                80
 07/10/2023   10:23:13   (  -0.01,-137.00) (  -0.37,-135.27)  196.42                80
 07/11/2023   22:45:09   (   0.01,-136.99) (  -0.81,-140.57)  408.76                80
 07/12/2023   22:29:03   (   0.01,-136.98) (   0.20,-136.04)  107.21                80
 07/14/2023   10:50:50   (  -0.02,-136.97) (   0.94,-141.31)  494.40                80
 07/15/2023   10:29:25   (  -0.02,-136.96) (  -0.07,-136.78)   21.07                80
 07/17/2023   22:32:34   (   0.02,-136.92) (  -0.14,-137.54)   70.30                80
 07/18/2023   22:16:28   (   0.02,-136.91) (   0.87,-133.00)  444.99                80
 07/20/2023   10:35:35   (  -0.02,-136.89) (   0.31,-138.27)  157.49                80