Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2019   22:33:57   (  -0.01,-137.18) (  -0.10,-137.58)   45.43                80
 05/16/2019   22:17:54   (  -0.01,-137.18) (   0.95,-133.06)  470.76                80
 05/18/2019   10:39:42   (   0.00,-137.21) (   0.25,-138.33)  127.73                80
 05/19/2019   10:18:17   (   0.00,-137.20) (  -0.74,-133.79)  387.69                80
 05/20/2019   22:40:15   (  -0.00,-137.16) (  -0.43,-139.10)  221.48                80
 05/21/2019   22:24:10   (   0.00,-137.15) (   0.56,-134.57)  293.89                80
 05/23/2019   10:45:59   (  -0.01,-137.17) (   0.58,-139.85)  305.22                80
 05/24/2019   10:24:35   (  -0.01,-137.15) (  -0.42,-135.32)  209.49                80
 05/25/2019   22:46:32   (   0.01,-137.10) (  -0.75,-140.63)  401.13                80
 05/26/2019   22:30:28   (   0.02,-137.09) (   0.25,-136.09)  113.75                80
 05/28/2019   10:52:16   (  -0.02,-137.10) (   0.95,-141.36)  485.50                80