Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 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)
 05/11/2020   22:46:14   (   0.01,-137.20) (  -0.77,-140.59)  386.85                80
 05/12/2020   22:30:09   (   0.01,-137.20) (   0.26,-136.06)  129.79                80
 05/14/2020   10:51:56   (  -0.01,-137.20) (   0.93,-141.32)  470.62                80
 05/15/2020   10:30:32   (  -0.01,-137.20) (  -0.10,-136.79)   45.71                80
 05/17/2020   22:33:43   (   0.01,-137.19) (  -0.10,-137.56)   42.54                80
 05/18/2020   22:17:38   (   0.01,-137.19) (   0.93,-133.03)  473.69                80
 05/20/2020   10:39:26   (  -0.01,-137.18) (   0.26,-138.29)  127.66                80
 05/21/2020   10:18:01   (  -0.01,-137.17) (  -0.77,-133.77)  387.92                80
 05/22/2020   22:39:57   (   0.00,-137.15) (  -0.40,-139.07)  218.01                80
 05/23/2020   22:23:52   (   0.00,-137.14) (   0.58,-134.53)  297.20                80