Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2014   10:32:26   (  -0.08,-135.41) (  -0.08,-135.30)   11.99                80
 12/22/2014   22:35:34   (   0.08,-135.35) (  -0.09,-136.07)   82.26                80
 12/23/2014   22:19:27   (   0.07,-135.34) (   0.90,-131.53)  433.50                80
 12/25/2014   10:38:34   (  -0.09,-135.36) (   0.23,-136.81)  165.53                80
 12/26/2014   10:22:27   (  -0.08,-135.34) (  -0.77,-132.28)  349.66                80
 12/27/2014   22:41:40   (   0.09,-135.28) (  -0.44,-137.57)  261.77                80
 12/28/2014   22:25:34   (   0.09,-135.27) (   0.56,-133.04)  253.48                80
 12/30/2014   10:44:40   (  -0.10,-135.28) (   0.56,-138.32)  345.70                80
 12/31/2014   10:28:34   (  -0.09,-135.26) (  -0.45,-133.78)  169.06                80
 01/01/2015   22:47:47   (   0.10,-135.18) (  -0.75,-139.08)  443.60                80