Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/04/2018   22:40:03   (   0.13,-135.30) (  -0.70,-138.94)  415.26                80
 07/05/2018   22:23:58   (   0.12,-135.32) (   0.34,-134.41)  104.21                80
 07/07/2018   10:43:06   (  -0.15,-135.33) (   0.83,-139.68)  495.56                80
 07/08/2018   10:27:01   (  -0.14,-135.35) (  -0.20,-135.15)   23.39                80
 07/10/2018   22:27:33   (   0.15,-135.41) (   0.06,-135.93)   58.34                80
 07/11/2018   22:11:27   (   0.14,-135.42) (   1.04,-131.39)  459.81                80
 07/13/2018   10:30:35   (  -0.17,-135.41) (   0.13,-136.65)  141.89                80
 07/14/2018   10:14:30   (  -0.16,-135.42) (  -0.91,-132.13)  375.84                80
 07/15/2018   22:33:47   (   0.19,-135.45) (  -0.27,-137.43)  225.60                80
 07/16/2018   22:17:42   (   0.17,-135.46) (   0.77,-132.90)  292.11                80