Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 7.  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) (  -0.00,-135.90)   56.84                80
 07/08/2017   22:11:22   (   0.12,-135.39) (   1.03,-131.37)  458.50                80
 07/10/2017   10:30:29   (  -0.14,-135.33) (   0.13,-136.64)  148.66                80
 07/11/2017   10:14:24   (  -0.13,-135.31) (  -0.85,-132.10)  366.05                80
 07/12/2017   22:33:40   (   0.16,-135.31) (  -0.34,-137.40)  238.79                80
 07/13/2017   22:17:36   (   0.15,-135.29) (   0.70,-132.88)  275.93                80
 07/15/2017   10:36:43   (  -0.17,-135.23) (   0.47,-138.14)  331.67                80
 07/16/2017   10:20:38   (  -0.16,-135.20) (  -0.51,-133.60)  182.27                80
 07/17/2017   22:39:54   (   0.18,-135.19) (  -0.67,-138.91)  424.48                80
 07/18/2017   22:23:49   (   0.18,-135.16) (   0.37,-134.38)   89.25                80
 07/21/2017   10:24:11   (  -0.19,-135.05) (  -0.18,-135.11)    6.44                80