Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/19/2018   10:33:05   (  -0.00,-135.44) (   0.26,-136.68)  140.92                80
 02/20/2018   10:11:40   (  -0.01,-135.44) (  -0.75,-132.14)  375.94                80
 02/21/2018   22:36:15   (   0.00,-135.42) (  -0.43,-137.44)  229.79                80
 02/22/2018   22:14:50   (   0.01,-135.42) (   0.58,-132.91)  286.59                80
 02/24/2018   10:39:16   (  -0.00,-135.43) (   0.60,-138.17)  312.48                80
 02/25/2018   10:17:50   (  -0.00,-135.42) (  -0.41,-133.64)  203.39                80
 02/26/2018   22:42:26   (  -0.00,-135.39) (  -0.77,-138.94)  403.86                80
 02/27/2018   22:21:00   (  -0.00,-135.38) (   0.24,-134.40)  111.71                80
 03/01/2018   10:45:27   (   0.00,-135.38) (   0.93,-139.67)  488.40                80
 03/02/2018   10:24:01   (   0.00,-135.36) (  -0.08,-135.13)   27.16                80