Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 8.  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   22:30:08   (   0.04,-135.34) (  -0.12,-136.03)   79.66                80
 12/10/2015   22:14:03   (   0.02,-135.32) (   0.87,-131.50)  435.18                80
 12/12/2015   10:33:10   (  -0.04,-135.31) (   0.30,-136.77)  166.93                80
 12/13/2015   10:17:05   (  -0.03,-135.29) (  -0.69,-132.24)  347.07                80
 12/14/2015   22:36:20   (   0.05,-135.22) (  -0.49,-137.54)  265.13                80
 12/15/2015   22:20:14   (   0.04,-135.20) (   0.51,-133.01)  248.79                80
 12/17/2015   10:39:23   (  -0.06,-135.18) (   0.61,-138.29)  353.87                80
 12/18/2015   10:23:17   (  -0.05,-135.15) (  -0.39,-133.76)  159.39                80
 12/19/2015   22:42:32   (   0.07,-135.07) (  -0.84,-139.05)  454.48                80
 12/20/2015   22:26:26   (   0.06,-135.04) (   0.16,-134.52)   58.75                80