Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/22/2018   22:14:49   (  -0.00,-135.42) (   0.55,-132.90)  286.68                80
 02/24/2018   10:39:15   (   0.01,-135.43) (   0.63,-138.16)  312.03                80
 02/25/2018   10:17:50   (   0.00,-135.42) (  -0.38,-133.63)  203.92                80
 02/26/2018   22:42:25   (  -0.01,-135.39) (  -0.80,-138.93)  403.37                80
 02/27/2018   22:21:00   (  -0.01,-135.38) (   0.21,-134.40)  112.28                80
 03/01/2018   10:45:26   (   0.01,-135.38) (   0.96,-139.66)  487.31                80
 03/02/2018   10:24:01   (   0.01,-135.37) (  -0.05,-135.13)   28.18                80
 03/04/2018   22:29:50   (  -0.01,-135.32) (  -0.11,-135.89)   64.31                80
 03/05/2018   22:08:25   (  -0.00,-135.31) (   0.91,-131.36)  450.99                80
 03/07/2018   10:32:50   (   0.01,-135.30) (   0.32,-136.61)  149.36                80
 03/08/2018   10:11:25   (   0.00,-135.29) (  -0.69,-132.08)  365.57                80