Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2012   10:28:44   (  -0.08,-135.47) (   0.19,-136.71)  141.12                80
 12/20/2012   10:12:39   (  -0.07,-135.47) (  -0.78,-132.17)  376.02                80
 12/21/2012   22:31:55   (   0.09,-135.46) (  -0.38,-137.48)  230.01                80
 12/22/2012   22:15:50   (   0.08,-135.46) (   0.66,-132.95)  287.13                80
 12/24/2012   10:34:58   (  -0.09,-135.48) (   0.54,-138.21)  311.28                80
 12/25/2012   10:18:53   (  -0.08,-135.48) (  -0.50,-133.68)  205.15                80
 12/26/2012   22:38:08   (   0.09,-135.45) (  -0.72,-138.98)  402.68                80
 12/27/2012   22:22:04   (   0.08,-135.44) (   0.31,-134.45)  113.64                80
 12/29/2012   10:41:11   (  -0.09,-135.46) (   0.88,-139.71)  485.25                80
 12/30/2012   10:25:07   (  -0.08,-135.45) (  -0.15,-135.19)   30.41                80
 01/01/2013   22:25:38   (   0.09,-135.39) (  -0.04,-135.95)   63.46                80