Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/24/2018   10:39:16   (   0.01,-135.43) (   0.61,-138.17)  311.95                80
 02/25/2018   10:17:50   (   0.01,-135.42) (  -0.40,-133.63)  204.01                80
 02/26/2018   22:42:26   (  -0.01,-135.39) (  -0.78,-138.93)  403.22                80
 02/27/2018   22:21:00   (  -0.01,-135.38) (   0.23,-134.40)  112.50                80
 03/01/2018   10:45:26   (   0.01,-135.38) (   0.94,-139.66)  487.06                80
 03/02/2018   10:24:01   (   0.01,-135.37) (  -0.07,-135.13)   28.58                80
 03/04/2018   22:29:50   (  -0.01,-135.33) (  -0.15,-135.88)   63.94                80
 03/05/2018   22:08:24   (  -0.00,-135.31) (   0.86,-131.35)  451.35                80
 03/07/2018   10:32:51   (   0.01,-135.31) (   0.31,-136.61)  148.92                80
 03/08/2018   10:11:25   (   0.01,-135.29) (  -0.70,-132.08)  365.99                80