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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/08/2018   10:27:01   (  -0.14,-135.35) (  -0.19,-135.15)   23.68                80
 07/10/2018   22:27:33   (   0.15,-135.42) (   0.05,-135.92)   56.78                80
 07/11/2018   22:11:27   (   0.14,-135.44) (   1.02,-131.38)  461.53                80
 07/13/2018   10:30:35   (  -0.17,-135.43) (   0.09,-136.66)  140.44                80
 07/14/2018   10:14:30   (  -0.16,-135.44) (  -0.89,-132.12)  377.49                80
 07/15/2018   22:33:47   (   0.19,-135.48) (  -0.23,-137.44)  223.01                80
 07/16/2018   22:17:42   (   0.17,-135.49) (   0.75,-132.90)  294.89                80
 07/18/2018   10:36:49   (  -0.20,-135.47) (   0.42,-138.16)  307.40                80
 07/19/2018   10:20:45   (  -0.19,-135.48) (  -0.62,-133.64)  210.22                80
 07/20/2018   22:40:01   (   0.22,-135.51) (  -0.56,-138.94)  391.01                80