Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2012   10:29:41   (   0.00,-135.32) (   0.33,-136.79)  167.19                80
 05/10/2012   10:13:36   (   0.01,-135.34) (  -0.68,-132.26)  351.04                80
 05/11/2012   22:32:51   (   0.00,-135.36) (  -0.52,-137.56)  251.31                80
 05/12/2012   22:16:46   (  -0.01,-135.37) (   0.49,-133.02)  266.95                80
 05/14/2012   10:35:53   (  -0.01,-135.39) (   0.64,-138.30)  332.02                80
 05/15/2012   10:19:47   (  -0.00,-135.40) (  -0.36,-133.77)  185.88                80
 05/16/2012   22:39:04   (   0.02,-135.41) (  -0.79,-139.08)  417.41                80
 05/17/2012   22:22:58   (   0.02,-135.42) (   0.21,-134.54)  100.18                80
 05/19/2012   10:42:05   (  -0.04,-135.43) (   0.92,-139.82)  499.75                80
 05/20/2012   10:26:00   (  -0.03,-135.43) (  -0.07,-135.28)   17.30                80
 05/22/2012   22:26:31   (   0.04,-135.44) (  -0.08,-136.06)   70.80                80