Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/27/2017   10:33:31   (   0.35,-135.08) (   0.69,-136.60)  173.11                80
 08/28/2017   10:12:08   (   0.35,-135.07) (  -0.34,-132.07)  342.43                80
 08/29/2017   22:34:05   (  -0.35,-135.06) (  -0.84,-137.38)  263.90                80
 08/30/2017   22:18:01   (  -0.35,-135.06) (   0.13,-132.84)  252.13                80
 09/01/2017   10:39:50   (   0.34,-135.07) (   1.03,-138.12)  347.69                80
 09/02/2017   10:18:26   (   0.34,-135.06) (  -0.00,-133.60)  167.13                80
 09/03/2017   22:40:24   (  -0.34,-135.02) (  -1.18,-138.90)  441.89                80
 09/04/2017   22:24:19   (  -0.33,-135.01) (  -0.20,-134.37)   73.47                80
 09/07/2017   10:27:25   (   0.33,-135.01) (   0.33,-135.12)   12.01                80