Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 4 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2014   22:45:26   (  -0.01,-135.41) (  -0.88,-139.12)  423.65                80
 04/21/2014   22:29:24   (  -0.01,-135.40) (   0.15,-134.59)   91.67                80
 04/24/2014   10:29:51   (   0.02,-135.39) (   0.02,-135.34)    6.03                80
 04/26/2014   22:33:07   (  -0.01,-135.35) (  -0.21,-136.11)   87.13                80
 04/27/2014   22:17:05   (  -0.01,-135.34) (   0.82,-131.58)  427.63                80
 04/29/2014   10:38:55   (   0.01,-135.33) (   0.36,-136.85)  173.94                80
 04/30/2014   10:17:33   (   0.01,-135.31) (  -0.68,-132.33)  340.35                80
 05/01/2014   22:39:31   (  -0.01,-135.27) (  -0.54,-137.62)  268.67                80
 05/02/2014   22:23:28   (  -0.00,-135.25) (   0.50,-133.10)  245.50                80