Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 14.  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,-135.95)   60.39                80
 02/17/2018   22:08:39   (   0.01,-135.42) (   0.90,-131.41)  456.77                80
 02/19/2018   10:33:05   (  -0.01,-135.44) (   0.29,-136.67)  141.31                80
 02/20/2018   10:11:39   (  -0.01,-135.44) (  -0.72,-132.14)  375.49                80
 02/21/2018   22:36:15   (   0.01,-135.42) (  -0.46,-137.44)  230.09                80
 02/22/2018   22:14:49   (   0.01,-135.42) (   0.55,-132.90)  286.21                80
 02/24/2018   10:39:15   (  -0.00,-135.42) (   0.63,-138.17)  313.35                80
 02/25/2018   10:17:50   (   0.00,-135.41) (  -0.38,-133.63)  202.47                80
 02/26/2018   22:42:25   (  -0.00,-135.38) (  -0.80,-138.93)  404.60                80
 02/27/2018   22:21:00   (  -0.00,-135.37) (   0.22,-134.40)  110.84                80