Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2012   10:12:39   (  -0.07,-135.48) (  -0.83,-132.18)  376.28                80
 12/21/2012   22:31:55   (   0.09,-135.46) (  -0.39,-137.47)  229.79                80
 12/22/2012   22:15:50   (   0.08,-135.47) (   0.64,-132.94)  287.36                80
 12/24/2012   10:34:58   (  -0.09,-135.49) (   0.50,-138.22)  311.03                80
 12/25/2012   10:18:53   (  -0.08,-135.48) (  -0.47,-133.68)  205.39                80
 12/26/2012   22:38:09   (   0.09,-135.45) (  -0.70,-138.98)  402.49                80
 12/27/2012   22:22:05   (   0.08,-135.45) (   0.33,-134.46)  113.82                80
 12/29/2012   10:41:12   (  -0.09,-135.46) (   0.88,-139.72)  485.11                80
 12/30/2012   10:25:08   (  -0.08,-135.45) (  -0.15,-135.19)   30.49                80
 01/01/2013   22:25:38   (   0.09,-135.40) (  -0.06,-135.95)   63.58                80
 01/02/2013   22:09:34   (   0.08,-135.39) (   0.96,-131.42)  451.84                80