Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2016   22:28:05   (  -0.38,-135.01) (  -0.57,-135.82)   93.27                80
 08/22/2016   22:12:01   (  -0.37,-135.04) (   0.49,-131.30)  427.26                80
 08/24/2016   10:33:48   (   0.38,-135.11) (   0.68,-136.57)  165.92                80
 08/25/2016   10:12:23   (   0.37,-135.14) (  -0.32,-132.03)  353.61                80
 08/26/2016   22:34:18   (  -0.37,-135.16) (  -0.85,-137.34)  247.68                80
 08/27/2016   22:18:13   (  -0.37,-135.19) (   0.15,-132.80)  272.05                80
 08/29/2016   10:40:00   (   0.36,-135.25) (   1.01,-138.07)  321.45                80
 08/30/2016   10:18:35   (   0.36,-135.28) (  -0.05,-133.55)  197.68                80
 08/31/2016   22:40:30   (  -0.36,-135.29) (  -1.18,-138.84)  405.03                80
 09/01/2016   22:24:25   (  -0.36,-135.32) (  -0.12,-134.32)  114.52                80
 09/03/2016   10:46:12   (   0.35,-135.38) (   1.28,-139.59)  478.71                80
 09/04/2016   10:24:47   (   0.36,-135.40) (   0.28,-135.05)   40.14                80