Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 4.  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   22:27:16   (  -0.03,-135.32) (  -0.15,-135.91)   66.51                80
 03/05/2018   22:08:31   (  -0.02,-135.31) (   0.85,-131.37)  447.89                80
 03/07/2018   10:32:59   (   0.03,-135.28) (   0.33,-136.65)  155.38                80
 03/08/2018   10:11:35   (   0.03,-135.26) (  -0.66,-132.11)  358.58                80
 03/09/2018   22:33:32   (  -0.03,-135.22) (  -0.52,-137.42)  250.12                80
 03/10/2018   22:17:28   (  -0.03,-135.20) (   0.47,-132.89)  263.60                80
 03/12/2018   10:39:16   (   0.04,-135.17) (   0.70,-138.16)  340.58                80
 03/13/2018   10:17:52   (   0.04,-135.14) (  -0.30,-133.63)  172.71                80
 03/14/2018   22:39:49   (  -0.05,-135.09) (  -0.88,-138.93)  437.10                80
 03/15/2018   22:21:05   (  -0.04,-135.07) (   0.11,-134.40)   75.98                80
 03/18/2018   10:26:48   (   0.05,-134.99) (   0.06,-135.14)   16.52                80