Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/29/2017   22:34:05   (  -0.35,-135.06) (  -0.87,-137.37)  263.95                80
 08/30/2017   22:18:01   (  -0.35,-135.06) (   0.17,-132.85)  252.02                80
 09/01/2017   10:39:50   (   0.34,-135.07) (   1.05,-138.11)  347.80                80
 09/02/2017   10:18:26   (   0.34,-135.06) (   0.01,-133.59)  166.94                80
 09/03/2017   22:40:23   (  -0.34,-135.01) (  -1.19,-138.90)  442.25                80
 09/04/2017   22:24:19   (  -0.33,-135.01) (  -0.21,-134.36)   73.10                80
 09/07/2017   10:27:25   (   0.33,-135.00) (   0.34,-135.11)   12.26                80
 09/09/2017   22:27:58   (  -0.33,-134.93) (  -0.53,-135.89)  109.14                80
 09/10/2017   22:11:53   (  -0.33,-134.91) (   0.46,-131.35)  405.30                80