Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/08/2013   22:08:14   (  -0.04,-134.74) (   0.68,-131.56)  362.73                80
 04/10/2013   10:30:04   (   0.04,-134.70) (   0.49,-136.83)  242.69                80
 04/11/2013   10:13:59   (   0.03,-134.65) (  -0.49,-132.29)  268.98                80
 04/12/2013   22:35:56   (  -0.04,-134.57) (  -0.69,-137.60)  344.84                80
 04/13/2013   22:14:32   (  -0.04,-134.52) (   0.30,-133.06)  166.47                80
 04/15/2013   10:36:20   (   0.04,-134.47) (   0.92,-138.32)  439.98                80
 04/16/2013   10:20:17   (   0.04,-134.42) (  -0.12,-133.80)   71.13                80
 04/18/2013   22:20:49   (  -0.05,-134.27) (  -0.12,-134.56)   32.86                80
 04/19/2013   22:04:44   (  -0.05,-134.22) (   0.87,-130.02)  477.75                80
 04/21/2013   10:23:52   (   0.05,-134.15) (   0.33,-135.29)  129.85                80