Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2018   22:17:42   (   0.17,-135.50) (   0.74,-132.89)  296.38                80
 07/18/2018   10:36:49   (  -0.20,-135.49) (   0.42,-138.16)  305.53                80
 07/19/2018   10:20:44   (  -0.19,-135.49) (  -0.62,-133.63)  212.29                80
 07/20/2018   22:40:01   (   0.22,-135.53) (  -0.56,-138.94)  388.74                80
 07/21/2018   22:23:56   (   0.21,-135.54) (   0.48,-134.41)  128.81                80
 07/23/2018   10:43:04   (  -0.24,-135.52) (   0.68,-139.68)  473.90                80
 07/24/2018   10:26:58   (  -0.23,-135.52) (  -0.30,-135.14)   43.18                80
 07/26/2018   22:27:30   (   0.24,-135.54) (   0.17,-135.91)   42.22                80
 07/27/2018   22:11:24   (   0.23,-135.54) (   1.15,-131.37)  474.51                80
 07/29/2018   10:30:32   (  -0.26,-135.51) (   0.01,-136.64)  129.25                80