Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/25/2017   22:11:42   (  -0.35,-135.07) (   0.48,-131.32)  426.84                80
 08/27/2017   10:33:31   (   0.35,-135.08) (   0.68,-136.60)  173.07                80
 08/28/2017   10:12:07   (   0.35,-135.08) (  -0.30,-132.06)  342.60                80
 08/29/2017   22:34:04   (  -0.35,-135.06) (  -0.89,-137.37)  263.38                80
 08/30/2017   22:18:01   (  -0.35,-135.06) (   0.15,-132.85)  252.75                80
 09/01/2017   10:39:50   (   0.34,-135.08) (   1.02,-138.12)  347.07                80
 09/02/2017   10:18:26   (   0.34,-135.07) (   0.04,-133.59)  167.88                80
 09/03/2017   22:40:23   (  -0.33,-135.03) (  -1.22,-138.89)  440.77                80
 09/04/2017   22:24:19   (  -0.33,-135.02) (  -0.18,-134.37)   74.70                80
 09/07/2017   10:27:24   (   0.33,-135.02) (   0.36,-135.11)   10.43                80