Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/10/2017   10:24:58   (   0.09,-134.69) (   0.23,-135.24)   63.43                80
 11/11/2017   10:08:54   (   0.10,-134.73) (  -0.81,-130.71)  457.96                80
 11/12/2017   22:28:10   (  -0.07,-134.70) (  -0.38,-136.02)  150.44                80
 11/13/2017   22:12:06   (  -0.08,-134.75) (   0.66,-131.50)  371.13                80
 11/15/2017   10:31:14   (   0.06,-134.91) (   0.46,-136.78)  212.08                80
 11/16/2017   10:15:09   (   0.07,-134.95) (  -0.52,-132.24)  309.07                80
 11/17/2017   22:34:25   (  -0.05,-134.92) (  -0.66,-137.55)  300.34                80
 11/18/2017   22:18:20   (  -0.06,-134.96) (   0.38,-133.02)  220.64                80
 11/20/2017   10:37:29   (   0.04,-135.11) (   0.73,-138.31)  363.29                80
 11/21/2017   10:21:23   (   0.06,-135.15) (  -0.25,-133.77)  157.11                80