Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2017   10:18:26   (   0.34,-135.05) (  -0.01,-133.59)  166.89                80
 09/03/2017   22:40:23   (  -0.34,-135.01) (  -1.23,-138.89)  442.22                80
 09/04/2017   22:24:19   (  -0.34,-135.01) (  -0.19,-134.36)   73.09                80
 09/07/2017   10:27:24   (   0.33,-135.00) (   0.38,-135.10)   12.48                80
 09/09/2017   22:27:58   (  -0.33,-134.92) (  -0.52,-135.89)  109.30                80
 09/10/2017   22:11:53   (  -0.33,-134.91) (   0.46,-131.35)  405.14                80
 09/12/2017   10:33:43   (   0.32,-134.91) (   0.70,-136.63)  195.60                80
 09/13/2017   10:12:18   (   0.32,-134.88) (  -0.28,-132.09)  317.42                80
 09/14/2017   22:34:16   (  -0.31,-134.79) (  -0.89,-137.40)  296.86                80