Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 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)
 04/15/2016   22:28:38   (  -0.06,-135.38) (  -0.19,-135.92)   61.30                80
 04/16/2016   22:12:34   (  -0.06,-135.39) (   0.81,-131.39)  455.57                80
 04/18/2016   10:34:22   (   0.06,-135.40) (   0.37,-136.66)  143.72                80
 04/19/2016   10:12:58   (   0.06,-135.40) (  -0.64,-132.13)  372.68                80
 04/20/2016   22:34:55   (  -0.06,-135.40) (  -0.50,-137.45)  233.17                80
 04/21/2016   22:18:51   (  -0.06,-135.40) (   0.51,-132.92)  283.14                80
 04/23/2016   10:40:39   (   0.06,-135.41) (   0.67,-138.19)  316.79                80
 04/24/2016   10:19:14   (   0.06,-135.40) (  -0.34,-133.66)  198.85                80
 04/25/2016   22:41:11   (  -0.06,-135.38) (  -0.85,-138.96)  408.68                80
 04/26/2016   22:25:06   (  -0.06,-135.37) (   0.17,-134.44)  106.77                80
 04/28/2016   10:46:54   (   0.06,-135.37) (   1.01,-139.71)  494.20                80