Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 9 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)
 09/15/2016   10:18:28   (   0.33,-135.48) (  -0.09,-133.52)  222.26                80
 09/16/2016   22:40:25   (  -0.32,-135.45) (  -1.06,-138.84)  385.48                80
 09/17/2016   22:24:19   (  -0.32,-135.45) (  -0.09,-134.30)  131.29                80
 09/19/2016   10:43:27   (   0.31,-135.48) (   1.24,-139.57)  466.28                80
 09/20/2016   10:27:21   (   0.32,-135.47) (   0.20,-135.04)   50.13                80
 09/22/2016   22:27:48   (  -0.31,-135.42) (  -0.36,-135.79)   41.70                80
 09/23/2016   22:11:41   (  -0.31,-135.41) (   0.64,-131.25)  475.25                80
 09/25/2016   10:30:44   (   0.29,-135.43) (   0.52,-136.50)  121.77                80
 09/26/2016   10:14:35   (   0.30,-135.42) (  -0.49,-131.96)  395.02                80
 09/27/2016   22:33:45   (  -0.28,-135.36) (  -0.72,-137.23)  213.12                80
 09/28/2016   22:17:35   (  -0.28,-135.35) (   0.29,-132.68)  304.44                80