Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/29/2019   10:52:28   (  -0.02,-137.21) (   0.95,-141.38)  475.87                80
 06/30/2019   10:31:05   (  -0.02,-137.21) (  -0.11,-136.86)   40.31                80
 07/02/2019   22:34:17   (   0.01,-137.18) (  -0.10,-137.63)   51.12                80
 07/03/2019   22:18:12   (   0.01,-137.17) (   0.91,-133.09)  464.48                80
 07/05/2019   10:37:21   (  -0.01,-137.17) (   0.26,-138.37)  135.94                80
 07/06/2019   10:21:16   (  -0.00,-137.16) (  -0.74,-133.83)  379.27                80
 07/07/2019   22:40:32   (   0.00,-137.13) (  -0.47,-139.13)  229.22                80
 07/08/2019   22:24:28   (  -0.00,-137.11) (   0.53,-134.60)  285.89                80
 07/10/2019   10:43:36   (   0.00,-137.11) (   0.64,-139.87)  315.17                80
 07/11/2019   10:27:32   (   0.00,-137.09) (  -0.37,-135.34)  199.47                80