Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2015   22:36:47   (  -0.21,-134.88) (  -0.74,-137.40)  286.77                80
 10/12/2015   22:20:41   (  -0.22,-134.85) (   0.20,-132.85)  226.81                80
 10/14/2015   10:39:48   (   0.20,-134.79) (   0.94,-138.14)  381.13                80
 10/15/2015   10:23:43   (   0.21,-134.75) (  -0.06,-133.60)  131.52                80
 10/16/2015   22:42:59   (  -0.18,-134.70) (  -1.10,-138.92)  479.50                80
 10/17/2015   22:26:53   (  -0.19,-134.67) (  -0.10,-134.38)   33.22                80
 10/20/2015   10:27:14   (   0.18,-134.56) (   0.30,-135.12)   63.76                80
 10/21/2015   10:11:09   (   0.19,-134.51) (  -0.70,-130.58)  447.74                80
 10/22/2015   22:30:24   (  -0.16,-134.44) (  -0.51,-135.89)  165.36                80
 10/23/2015   22:14:19   (  -0.17,-134.39) (   0.50,-131.35)  346.33                80
 10/25/2015   10:33:26   (   0.14,-134.32) (   0.64,-136.63)  263.09                80