Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 1 21.  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,-134.72) (  -0.53,-137.41)  306.89                80
 01/23/2013   22:15:48   (   0.08,-134.68) (   0.47,-132.88)  204.65                80
 01/25/2013   10:37:38   (  -0.08,-134.64) (   0.72,-138.15)  400.57                80
 01/26/2013   10:16:14   (  -0.08,-134.59) (  -0.28,-133.62)  110.28                80
 01/28/2013   22:22:09   (   0.08,-134.44) (   0.07,-134.40)    4.71                80
 01/31/2013   10:25:15   (  -0.08,-134.35) (   0.12,-135.14)   91.08                80
 02/01/2013   10:03:51   (  -0.08,-134.29) (  -0.88,-130.61)  418.87                80
 02/02/2013   22:25:50   (   0.08,-134.17) (  -0.32,-135.92)  199.67                80
 02/03/2013   22:09:46   (   0.07,-134.11) (   0.68,-131.39)  310.06                80