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,-135.23) (  -0.71,-137.50)  258.32                80
 10/17/2017   22:18:24   (  -0.20,-135.22) (   0.31,-132.97)  256.34                80
 10/19/2017   10:37:32   (   0.17,-135.25) (   0.83,-138.25)  341.80                80
 10/20/2017   10:21:26   (   0.19,-135.22) (  -0.14,-133.71)  172.13                80
 10/21/2017   22:40:43   (  -0.16,-135.12) (  -1.06,-139.02)  444.34                80
 10/22/2017   22:24:38   (  -0.17,-135.10) (  -0.03,-134.49)   69.68                80
 10/25/2017   10:25:01   (   0.16,-135.10) (   0.20,-135.23)   15.50                80
 10/26/2017   10:08:57   (   0.17,-135.06) (  -0.83,-130.70)  497.47                80
 10/27/2017   22:28:13   (  -0.15,-134.95) (  -0.36,-136.01)  120.92                80
 10/28/2017   22:12:07   (  -0.16,-134.91) (   0.60,-131.47)  392.18                80