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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/16/2018   22:30:04   (   0.00,-135.41) (  -0.11,-135.94)   60.43                80
 02/17/2018   22:08:38   (   0.01,-135.42) (   0.90,-131.41)  456.74                80
 02/19/2018   10:33:05   (  -0.01,-135.44) (   0.29,-136.67)  141.21                80
 02/20/2018   10:11:39   (  -0.01,-135.44) (  -0.72,-132.14)  375.61                80
 02/21/2018   22:36:15   (   0.01,-135.42) (  -0.46,-137.44)  230.03                80
 02/22/2018   22:14:49   (   0.01,-135.42) (   0.55,-132.90)  286.29                80
 02/24/2018   10:39:15   (  -0.00,-135.42) (   0.63,-138.17)  313.16                80
 02/25/2018   10:17:50   (  -0.00,-135.41) (  -0.38,-133.63)  202.68                80
 02/26/2018   22:42:25   (  -0.00,-135.38) (  -0.80,-138.93)  404.44                80
 02/27/2018   22:21:00   (  -0.00,-135.37) (   0.22,-134.40)  111.02                80
 03/01/2018   10:45:26   (   0.00,-135.37) (   0.96,-139.66)  489.47                80