Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 12 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2013   10:38:59   (  -0.08,-135.33) (   0.60,-138.26)  335.08                80
 12/12/2013   10:22:56   (  -0.07,-135.31) (  -0.44,-133.74)  179.49                80
 12/13/2013   22:42:14   (   0.09,-135.25) (  -0.76,-139.04)  432.89                80
 12/14/2013   22:26:11   (   0.08,-135.22) (   0.22,-134.51)   81.22                80
 12/17/2013   10:29:19   (  -0.08,-135.20) (  -0.09,-135.26)    6.58                80
 12/19/2013   22:29:54   (   0.09,-135.10) (  -0.12,-136.03)  105.70                80
 12/20/2013   22:13:50   (   0.08,-135.07) (   0.88,-131.49)  407.62                80
 12/22/2013   10:33:00   (  -0.10,-135.06) (   0.30,-136.77)  194.74                80
 12/23/2013   10:16:57   (  -0.09,-135.03) (  -0.70,-132.23)  318.45                80
 12/24/2013   22:36:15   (   0.11,-134.95) (  -0.49,-137.54)  295.49                80