Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 31.  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)
 04/01/2023   22:39:38   (  -0.01,-136.98) (  -0.49,-139.09)  240.14                80
 04/02/2023   22:23:32   (  -0.01,-136.98) (   0.50,-134.55)  276.93                80
 04/04/2023   10:45:18   (   0.02,-137.00) (   0.63,-139.82)  321.44                80
 04/05/2023   10:23:52   (   0.02,-137.00) (  -0.36,-135.28)  195.28                80
 04/06/2023   22:48:26   (  -0.02,-136.98) (  -0.80,-140.58)  410.51                80
 04/07/2023   22:27:00   (  -0.01,-136.97) (   0.20,-136.05)  105.79                80
 04/09/2023   10:51:25   (   0.02,-136.97) (   0.98,-141.31)  493.90                80
 04/10/2023   10:29:58   (   0.02,-136.96) (  -0.03,-136.77)   21.79                80
 04/12/2023   22:33:05   (  -0.03,-136.90) (  -0.16,-137.52)   70.55                80
 04/13/2023   22:16:59   (  -0.03,-136.88) (   0.86,-132.99)  444.56                80