Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/03/2018   10:20:46   (  -0.11,-135.24) (  -0.46,-133.63)  183.01                80
 07/04/2018   22:40:03   (   0.13,-135.30) (  -0.66,-138.95)  415.44                80
 07/05/2018   22:23:58   (   0.12,-135.32) (   0.31,-134.41)  103.99                80
 07/07/2018   10:43:06   (  -0.15,-135.33) (   0.80,-139.69)  495.65                80
 07/08/2018   10:27:01   (  -0.14,-135.35) (  -0.18,-135.15)   23.16                80
 07/10/2018   22:27:32   (   0.15,-135.41) (   0.03,-135.92)   58.70                80
 07/11/2018   22:11:28   (   0.14,-135.42) (   1.07,-131.39)  459.38                80
 07/13/2018   10:30:35   (  -0.17,-135.41) (   0.10,-136.66)  142.16                80
 07/14/2018   10:14:30   (  -0.16,-135.42) (  -0.88,-132.12)  375.50                80
 07/15/2018   22:33:47   (   0.19,-135.45) (  -0.24,-137.44)  226.18                80