Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2016   10:31:15   (  -0.06,-134.79) (   0.42,-136.80)  230.55                80
 12/31/2016   10:15:10   (  -0.05,-134.75) (  -0.62,-132.28)  281.51                80
 01/01/2017   22:34:26   (   0.07,-134.66) (  -0.58,-137.58)  332.66                80
 01/02/2017   22:18:20   (   0.06,-134.61) (   0.41,-133.04)  179.04                80
 01/04/2017   10:37:28   (  -0.07,-134.56) (   0.79,-138.31)  427.33                80
 01/05/2017   10:21:23   (  -0.07,-134.51) (  -0.26,-133.78)   84.00                80
 01/07/2017   22:21:53   (   0.07,-134.36) (   0.04,-134.54)   20.58                80
 01/08/2017   22:05:47   (   0.06,-134.30) (   1.03,-130.00)  490.23                80
 01/10/2017   10:24:55   (  -0.06,-134.24) (   0.16,-135.27)  117.59                80
 01/11/2017   10:08:49   (  -0.06,-134.18) (  -0.82,-130.73)  392.68                80