Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/07/2018   10:43:05   (  -0.15,-135.33) (   0.85,-139.67)  495.37                80
 07/08/2018   10:27:01   (  -0.14,-135.35) (  -0.18,-135.15)   23.62                80
 07/10/2018   22:27:32   (   0.15,-135.42) (   0.04,-135.92)   57.13                80
 07/11/2018   22:11:28   (   0.14,-135.43) (   1.07,-131.39)  461.12                80
 07/13/2018   10:30:35   (  -0.17,-135.42) (   0.10,-136.66)  140.81                80
 07/14/2018   10:14:30   (  -0.16,-135.43) (  -0.88,-132.12)  377.04                80
 07/15/2018   22:33:47   (   0.19,-135.47) (  -0.24,-137.44)  223.70                80
 07/16/2018   22:17:42   (   0.17,-135.48) (   0.74,-132.90)  294.14                80
 07/18/2018   10:36:49   (  -0.20,-135.46) (   0.43,-138.16)  308.11                80
 07/19/2018   10:20:44   (  -0.19,-135.47) (  -0.61,-133.64)  209.45                80