Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2015   22:32:27   (  -0.05,-135.37) (  -0.19,-135.91)   63.04                80
 05/16/2015   22:16:22   (  -0.05,-135.35) (   0.84,-131.39)  451.79                80
 05/18/2015   10:35:29   (   0.04,-135.37) (   0.36,-136.66)  147.96                80
 05/19/2015   10:19:25   (   0.04,-135.35) (  -0.68,-132.14)  366.49                80
 05/20/2015   22:38:41   (  -0.03,-135.29) (  -0.50,-137.45)  245.97                80
 05/21/2015   22:22:36   (  -0.04,-135.27) (   0.47,-132.91)  268.38                80
 05/23/2015   10:41:43   (   0.03,-135.28) (   0.71,-138.18)  331.77                80
 05/24/2015   10:25:39   (   0.04,-135.26) (  -0.33,-133.66)  182.36                80
 05/25/2015   22:44:54   (  -0.03,-135.18) (  -0.90,-138.96)  430.87                80
 05/26/2015   22:28:49   (  -0.03,-135.16) (   0.14,-134.43)   83.09                80