Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2017   10:27:13   (   0.35,-135.05) (   0.33,-135.08)    4.46                80
 08/24/2017   22:27:46   (  -0.35,-135.07) (  -0.55,-135.85)   89.77                80
 08/25/2017   22:11:42   (  -0.35,-135.08) (   0.49,-131.33)  427.28                80
 08/27/2017   10:33:32   (   0.35,-135.08) (   0.68,-136.60)  172.69                80
 08/28/2017   10:12:07   (   0.35,-135.08) (  -0.30,-132.07)  343.13                80
 08/29/2017   22:34:04   (  -0.35,-135.08) (  -0.89,-137.37)  262.36                80
 08/30/2017   22:18:01   (  -0.35,-135.08) (   0.15,-132.85)  253.92                80
 09/01/2017   10:39:50   (   0.34,-135.09) (   1.02,-138.12)  345.98                80
 09/02/2017   10:18:27   (   0.34,-135.08) (  -0.01,-133.60)  169.09                80
 09/03/2017   22:40:23   (  -0.33,-135.05) (  -1.23,-138.89)  439.06                80
 09/04/2017   22:24:20   (  -0.33,-135.04) (  -0.19,-134.37)   76.55                80