Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/05/2018   22:23:58   (   0.12,-135.33) (   0.34,-134.41)  104.57                80
 07/07/2018   10:43:06   (  -0.15,-135.33) (   0.83,-139.68)  495.39                80
 07/08/2018   10:27:01   (  -0.14,-135.35) (  -0.21,-135.15)   23.70                80
 07/10/2018   22:27:33   (   0.15,-135.42) (   0.06,-135.93)   57.54                80
 07/11/2018   22:11:27   (   0.14,-135.43) (   1.04,-131.39)  460.70                80
 07/13/2018   10:30:35   (  -0.17,-135.42) (   0.13,-136.65)  141.17                80
 07/14/2018   10:14:30   (  -0.16,-135.43) (  -0.91,-132.13)  376.64                80
 07/15/2018   22:33:47   (   0.19,-135.46) (  -0.27,-137.43)  224.32                80
 07/16/2018   22:17:42   (   0.17,-135.47) (   0.77,-132.90)  293.48                80
 07/18/2018   10:36:49   (  -0.20,-135.46) (   0.40,-138.17)  308.69                80
 07/19/2018   10:20:44   (  -0.19,-135.46) (  -0.58,-133.63)  208.81                80