Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2019   10:52:08   (   0.00,-137.21) (   0.92,-141.34)  470.26                80
 05/13/2019   10:30:44   (   0.00,-137.21) (  -0.07,-136.80)   45.95                80
 05/15/2019   22:33:57   (  -0.00,-137.18) (  -0.12,-137.58)   45.71                80
 05/16/2019   22:17:53   (  -0.00,-137.18) (   0.93,-133.06)  470.57                80
 05/18/2019   10:39:42   (  -0.00,-137.21) (   0.27,-138.33)  127.73                80
 05/19/2019   10:18:18   (  -0.00,-137.20) (  -0.79,-133.80)  387.69                80
 05/20/2019   22:40:14   (   0.01,-137.16) (  -0.44,-139.10)  221.65                80
 05/21/2019   22:24:11   (   0.02,-137.15) (   0.61,-134.58)  293.69                80
 05/23/2019   10:45:59   (  -0.02,-137.17) (   0.59,-139.85)  305.25                80
 05/24/2019   10:24:35   (  -0.02,-137.16) (  -0.40,-135.31)  209.63                80