Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2018   22:27:33   (   0.15,-135.43) (   0.05,-135.92)   56.44                80
 07/11/2018   22:11:27   (   0.14,-135.44) (   1.03,-131.38)  461.97                80
 07/13/2018   10:30:36   (  -0.17,-135.43) (   0.08,-136.66)  139.97                80
 07/14/2018   10:14:30   (  -0.16,-135.44) (  -0.90,-132.12)  378.09                80
 07/15/2018   22:33:47   (   0.19,-135.48) (  -0.22,-137.44)  222.09                80
 07/16/2018   22:17:42   (   0.17,-135.49) (   0.76,-132.90)  295.93                80
 07/18/2018   10:36:49   (  -0.20,-135.48) (   0.41,-138.17)  306.35                80
 07/19/2018   10:20:45   (  -0.19,-135.49) (  -0.63,-133.64)  211.40                80
 07/20/2018   22:40:01   (   0.22,-135.52) (  -0.55,-138.94)  389.48                80
 07/21/2018   22:23:56   (   0.21,-135.53) (   0.43,-134.40)  128.02                80
 07/23/2018   10:43:04   (  -0.24,-135.51) (   0.68,-139.68)  475.10                80