Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 1 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2013   22:31:52   (   0.09,-134.69) (  -0.53,-137.41)  309.82                80
 01/23/2013   22:15:48   (   0.08,-134.64) (   0.48,-132.88)  201.22                80
 01/25/2013   10:37:37   (  -0.08,-134.60) (   0.71,-138.15)  404.42                80
 01/26/2013   10:16:14   (  -0.08,-134.55) (  -0.29,-133.62)  105.90                80
 01/28/2013   22:19:28   (   0.08,-134.38) (   0.05,-134.39)    3.52                80
 01/31/2013   10:25:14   (  -0.08,-134.28) (   0.12,-135.14)   97.72                80
 02/01/2013   10:03:50   (  -0.08,-134.22) (  -0.90,-130.61)  411.74                80
 02/02/2013   22:25:47   (   0.08,-134.09) (  -0.34,-135.91)  207.83                80
 02/03/2013   22:09:44   (   0.07,-134.03) (   0.68,-131.38)  301.50                80
 02/05/2013   10:31:32   (  -0.07,-133.97) (   0.55,-136.64)  305.70                80