Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2015   10:45:44   (  -0.05,-135.41) (   0.91,-139.80)  499.70                80
 12/07/2015   10:29:38   (  -0.03,-135.40) (  -0.08,-135.27)   15.55                80
 12/09/2015   22:30:08   (   0.04,-135.33) (  -0.12,-136.04)   79.87                80
 12/10/2015   22:14:03   (   0.02,-135.32) (   0.88,-131.50)  434.98                80
 12/12/2015   10:33:10   (  -0.04,-135.31) (   0.30,-136.77)  166.81                80
 12/13/2015   10:17:05   (  -0.03,-135.29) (  -0.70,-132.24)  347.20                80
 12/14/2015   22:36:20   (   0.05,-135.22) (  -0.48,-137.54)  265.20                80
 12/15/2015   22:20:14   (   0.04,-135.19) (   0.52,-133.01)  248.71                80
 12/17/2015   10:39:22   (  -0.06,-135.18) (   0.66,-138.28)  353.67                80
 12/18/2015   10:23:16   (  -0.05,-135.15) (  -0.34,-133.75)  159.61                80
 12/19/2015   22:42:32   (   0.07,-135.07) (  -0.83,-139.06)  454.42                80