Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2016   10:44:11   (  -0.11,-135.53) (   0.86,-139.77)  483.64                80
 07/02/2016   10:28:07   (  -0.10,-135.53) (  -0.18,-135.25)   32.98                80
 07/04/2016   22:28:38   (   0.11,-135.52) (  -0.01,-136.02)   56.63                80
 07/05/2016   22:12:33   (   0.10,-135.52) (   1.03,-131.49)  459.74                80
 07/07/2016   10:31:40   (  -0.13,-135.52) (   0.13,-136.76)  141.33                80
 07/08/2016   10:15:35   (  -0.12,-135.51) (  -0.85,-132.22)  374.88                80
 07/09/2016   22:34:51   (   0.14,-135.50) (  -0.32,-137.53)  231.60                80
 07/10/2016   22:18:46   (   0.13,-135.49) (   0.66,-132.99)  284.40                80
 07/12/2016   10:37:53   (  -0.15,-135.48) (   0.50,-138.26)  317.41                80
 07/13/2016   10:21:49   (  -0.14,-135.47) (  -0.54,-133.74)  198.20                80