Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 10 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/16/2017   22:34:28   (  -0.19,-135.21) (  -0.71,-137.50)  261.42                80
 10/17/2017   22:18:23   (  -0.20,-135.20) (   0.31,-132.98)  253.15                80
 10/19/2017   10:37:32   (   0.18,-135.25) (   0.85,-138.26)  342.92                80
 10/20/2017   10:21:27   (   0.19,-135.22) (  -0.17,-133.73)  170.95                80
 10/21/2017   22:40:43   (  -0.17,-135.10) (  -1.06,-139.02)  447.84                80
 10/22/2017   22:24:38   (  -0.18,-135.08) (  -0.04,-134.50)   66.08                80
 10/25/2017   10:27:42   (   0.16,-135.09) (   0.17,-135.25)   17.42                80
 10/26/2017   10:08:56   (   0.18,-135.06) (  -0.80,-130.71)  495.77                80
 10/27/2017   22:28:13   (  -0.15,-134.92) (  -0.38,-136.02)  124.90                80
 10/28/2017   22:12:07   (  -0.16,-134.89) (   0.59,-131.48)  388.10                80