Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/07/2017   22:27:27   (   0.13,-135.41) (   0.04,-135.91)   56.97                80
 07/08/2017   22:11:22   (   0.12,-135.39) (   1.02,-131.37)  458.40                80
 07/10/2017   10:30:29   (  -0.14,-135.33) (   0.15,-136.64)  148.61                80
 07/11/2017   10:14:24   (  -0.13,-135.31) (  -0.83,-132.10)  366.10                80
 07/12/2017   22:33:41   (   0.16,-135.31) (  -0.29,-137.41)  238.88                80
 07/13/2017   22:17:36   (   0.15,-135.29) (   0.68,-132.87)  275.82                80
 07/15/2017   10:36:43   (  -0.17,-135.23) (   0.48,-138.14)  331.65                80
 07/16/2017   10:20:37   (  -0.16,-135.20) (  -0.49,-133.60)  182.31                80
 07/17/2017   22:39:55   (   0.18,-135.19) (  -0.62,-138.92)  424.58                80
 07/18/2017   22:23:49   (   0.18,-135.16) (   0.36,-134.38)   89.12                80