Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 3 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2016   22:28:32   (  -0.03,-135.13) (  -0.22,-135.86)   84.35                80
 03/31/2016   22:12:29   (  -0.03,-135.15) (   0.84,-131.35)  434.58                80
 04/02/2016   10:34:17   (   0.04,-135.19) (   0.34,-136.62)  162.85                80
 04/03/2016   10:12:53   (   0.04,-135.21) (  -0.65,-132.09)  355.37                80
 04/04/2016   22:34:50   (  -0.04,-135.24) (  -0.50,-137.40)  246.19                80
 04/05/2016   22:18:46   (  -0.04,-135.26) (   0.50,-132.87)  271.96                80
 04/07/2016   10:40:34   (   0.04,-135.28) (   0.68,-138.14)  326.23                80
 04/08/2016   10:19:09   (   0.04,-135.30) (  -0.32,-133.61)  191.18                80
 04/09/2016   22:41:07   (  -0.04,-135.31) (  -0.83,-138.93)  412.03                80
 04/10/2016   22:25:02   (  -0.04,-135.32) (   0.18,-134.40)  105.34                80
 04/12/2016   10:46:51   (   0.05,-135.34) (   1.01,-139.67)  493.55                80
 04/13/2016   10:25:26   (   0.05,-135.35) (  -0.00,-135.14)   23.25                80