Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/11/2018   22:21:13   (   0.01,-135.37) (   0.21,-134.45)  105.52                80
 02/13/2018   10:45:39   (   0.00,-135.40) (   0.98,-139.71)  491.00                80
 02/14/2018   10:24:14   (   0.00,-135.41) (  -0.03,-135.17)   26.77                80
 02/16/2018   22:30:03   (  -0.00,-135.42) (  -0.14,-135.94)   60.26                80
 02/17/2018   22:08:38   (   0.00,-135.42) (   0.87,-131.40)  457.00                80
 02/19/2018   10:33:05   (  -0.00,-135.44) (   0.26,-136.68)  140.99                80
 02/20/2018   10:11:40   (  -0.00,-135.44) (  -0.75,-132.14)  375.82                80
 02/21/2018   22:36:15   (   0.00,-135.42) (  -0.43,-137.45)  229.87                80
 02/22/2018   22:14:50   (   0.00,-135.42) (   0.58,-132.91)  286.49                80
 02/24/2018   10:39:16   (   0.00,-135.42) (   0.60,-138.17)  313.00                80