Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2016   22:41:07   (  -0.05,-135.33) (  -0.85,-138.93)  409.57                80
 04/10/2016   22:25:02   (  -0.05,-135.34) (   0.16,-134.39)  108.09                80
 04/12/2016   10:46:50   (   0.05,-135.37) (   1.03,-139.67)  490.27                80
 04/13/2016   10:25:26   (   0.06,-135.38) (   0.03,-135.14)   27.02                80
 04/15/2016   22:28:39   (  -0.06,-135.39) (  -0.17,-135.92)   59.85                80
 04/16/2016   22:12:34   (  -0.06,-135.40) (   0.84,-131.39)  457.35                80
 04/18/2016   10:34:23   (   0.06,-135.42) (   0.35,-136.66)  141.62                80
 04/19/2016   10:12:58   (   0.06,-135.43) (  -0.66,-132.13)  375.10                80
 04/20/2016   22:34:55   (  -0.06,-135.43) (  -0.53,-137.44)  229.86                80
 04/21/2016   22:18:50   (  -0.06,-135.43) (   0.47,-132.91)  286.78                80
 04/23/2016   10:40:39   (   0.06,-135.44) (   0.65,-138.19)  312.95                80