Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 17.  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   (  -0.01,-135.44) (   0.27,-136.68)  141.08                80
 02/20/2018   10:11:40   (  -0.01,-135.44) (  -0.74,-132.14)  375.73                80
 02/21/2018   22:36:15   (   0.01,-135.42) (  -0.44,-137.44)  229.89                80
 02/22/2018   22:14:49   (   0.01,-135.42) (   0.57,-132.91)  286.43                80
 02/24/2018   10:39:16   (  -0.00,-135.42) (   0.61,-138.17)  312.91                80
 02/25/2018   10:17:50   (  -0.00,-135.42) (  -0.40,-133.63)  202.92                80
 02/26/2018   22:42:26   (  -0.00,-135.39) (  -0.78,-138.93)  404.19                80
 02/27/2018   22:21:00   (  -0.00,-135.37) (   0.23,-134.40)  111.31                80
 03/01/2018   10:45:26   (   0.00,-135.37) (   0.95,-139.66)  489.09                80
 03/02/2018   10:24:01   (  -0.00,-135.36) (  -0.07,-135.13)   26.30                80