Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2015   22:30:09   (   0.04,-135.34) (  -0.10,-136.04)   79.77                80
 12/10/2015   22:14:03   (   0.02,-135.32) (   0.89,-131.50)  435.08                80
 12/12/2015   10:33:10   (  -0.04,-135.31) (   0.29,-136.78)  166.97                80
 12/13/2015   10:17:05   (  -0.03,-135.29) (  -0.71,-132.24)  347.00                80
 12/14/2015   22:36:20   (   0.05,-135.22) (  -0.48,-137.55)  265.24                80
 12/15/2015   22:20:15   (   0.04,-135.19) (   0.52,-133.01)  248.64                80
 12/17/2015   10:39:22   (  -0.06,-135.18) (   0.66,-138.28)  353.99                80
 12/18/2015   10:23:17   (  -0.05,-135.15) (  -0.34,-133.75)  159.25                80
 12/19/2015   22:42:32   (   0.07,-135.07) (  -0.84,-139.05)  454.68                80
 12/20/2015   22:26:26   (   0.06,-135.04) (   0.16,-134.52)   58.54                80