Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 9 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)
 09/06/2016   22:27:57   (  -0.35,-135.39) (  -0.43,-135.82)   48.01                80
 09/07/2016   22:11:52   (  -0.36,-135.40) (   0.58,-131.28)  470.28                80
 09/09/2016   10:33:39   (   0.35,-135.44) (   0.58,-136.55)  126.11                80
 09/10/2016   10:12:14   (   0.35,-135.45) (  -0.43,-132.02)  391.31                80
 09/11/2016   22:34:09   (  -0.34,-135.43) (  -0.74,-137.32)  214.60                80
 09/12/2016   22:18:03   (  -0.34,-135.44) (   0.27,-132.79)  302.80                80
 09/14/2016   10:39:51   (   0.32,-135.47) (   0.88,-138.06)  294.22                80
 09/15/2016   10:18:25   (   0.33,-135.47) (  -0.13,-133.52)  222.54                80
 09/16/2016   22:40:19   (  -0.31,-135.44) (  -1.09,-138.81)  385.23                80
 09/17/2016   22:24:14   (  -0.32,-135.44) (  -0.08,-134.28)  131.55                80
 09/19/2016   10:43:21   (   0.31,-135.46) (   1.23,-139.55)  465.97                80