Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 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)
 03/04/2018   22:29:55   (  -0.03,-135.32) (  -0.18,-135.90)   66.53                80
 03/05/2018   22:08:32   (  -0.02,-135.31) (   0.88,-131.38)  447.93                80
 03/07/2018   10:32:59   (   0.03,-135.28) (   0.36,-136.64)  155.16                80
 03/08/2018   10:11:36   (   0.03,-135.26) (  -0.70,-132.12)  358.87                80
 03/09/2018   22:36:12   (  -0.03,-135.23) (  -0.55,-137.41)  249.93                80
 03/10/2018   22:14:48   (  -0.03,-135.20) (   0.51,-132.89)  263.85                80
 03/12/2018   10:39:16   (   0.04,-135.17) (   0.72,-138.15)  340.13                80
 03/13/2018   10:17:51   (   0.04,-135.15) (  -0.27,-133.62)  173.24                80
 03/14/2018   22:39:48   (  -0.04,-135.10) (  -0.90,-138.93)  436.68                80
 03/15/2018   22:23:44   (  -0.04,-135.07) (   0.10,-134.40)   76.45                80