Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/07/2017   22:27:27   (   0.13,-135.41) (   0.02,-135.91)   56.95                80
 07/08/2017   22:11:21   (   0.12,-135.39) (   0.99,-131.36)  458.36                80
 07/10/2017   10:30:29   (  -0.14,-135.33) (   0.17,-136.63)  148.60                80
 07/11/2017   10:14:24   (  -0.13,-135.31) (  -0.86,-132.10)  366.13                80
 07/12/2017   22:33:41   (   0.16,-135.31) (  -0.32,-137.41)  238.92                80
 07/13/2017   22:17:36   (   0.15,-135.29) (   0.71,-132.88)  275.78                80
 07/15/2017   10:36:43   (  -0.17,-135.23) (   0.46,-138.15)  331.66                80
 07/16/2017   10:20:38   (  -0.16,-135.20) (  -0.52,-133.61)  182.30                80
 07/17/2017   22:39:54   (   0.18,-135.19) (  -0.66,-138.91)  424.65                80
 07/18/2017   22:23:50   (   0.18,-135.16) (   0.38,-134.38)   89.08                80