Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 5 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)
 05/20/2012   10:25:58   (  -0.03,-135.45) (  -0.07,-135.27)   20.74                80
 05/22/2012   22:26:27   (   0.04,-135.47) (  -0.10,-136.04)   65.77                80
 05/23/2012   22:10:22   (   0.03,-135.47) (   0.91,-131.51)  451.12                80
 05/25/2012   10:29:28   (  -0.05,-135.45) (   0.26,-136.77)  150.83                80
 05/26/2012   10:13:23   (  -0.04,-135.45) (  -0.75,-132.24)  365.57                80
 05/27/2012   22:32:39   (   0.06,-135.45) (  -0.39,-137.55)  239.48                80
 05/28/2012   22:16:33   (   0.05,-135.44) (   0.56,-133.01)  276.75                80
 05/30/2012   10:35:40   (  -0.07,-135.42) (   0.56,-138.28)  326.10                80
 05/31/2012   10:19:34   (  -0.06,-135.41) (  -0.45,-133.75)  189.39                80
 06/01/2012   22:38:50   (   0.09,-135.39) (  -0.75,-139.05)  417.58                80
 06/02/2012   22:22:44   (   0.08,-135.38) (   0.26,-134.52)   97.51                80