Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/17/2015   22:39:49   (  -0.01,-135.13) (  -0.54,-137.48)  267.31                80
 03/18/2015   22:23:43   (  -0.00,-135.12) (   0.49,-132.95)  247.66                80
 03/20/2015   10:45:30   (   0.01,-135.11) (   0.67,-138.22)  354.10                80
 03/21/2015   10:24:03   (   0.00,-135.09) (  -0.29,-133.68)  160.12                80
 03/22/2015   22:45:58   (  -0.00,-135.04) (  -0.91,-138.98)  449.28                80
 03/23/2015   22:29:52   (  -0.00,-135.02) (   0.12,-134.45)   65.06                80
 03/26/2015   10:32:52   (   0.00,-134.98) (   0.07,-135.18)   23.39                80
 03/27/2015   10:11:26   (   0.00,-134.95) (  -0.96,-130.65)  490.26                80
 03/28/2015   22:33:21   (  -0.01,-134.89) (  -0.23,-135.95)  120.36                80
 03/29/2015   22:17:14   (  -0.00,-134.87) (   0.75,-131.41)  393.45                80