Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 6 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2012   22:25:51   (   0.18,-135.03) (   0.00,-135.94)  103.19                80
 06/24/2012   22:09:44   (   0.17,-135.06) (   0.99,-131.40)  417.22                80
 06/26/2012   10:28:51   (  -0.19,-135.11) (   0.15,-136.67)  177.69                80
 06/27/2012   10:12:44   (  -0.18,-135.13) (  -0.84,-132.13)  342.15                80
 06/28/2012   22:31:58   (   0.21,-135.16) (  -0.33,-137.43)  259.57                80
 06/29/2012   22:15:53   (   0.20,-135.18) (   0.73,-132.90)  259.80                80
 07/01/2012   10:34:59   (  -0.23,-135.22) (   0.41,-138.17)  336.62                80
 07/02/2012   10:18:53   (  -0.22,-135.23) (  -0.59,-133.63)  182.25                80
 07/03/2012   22:38:07   (   0.25,-135.24) (  -0.56,-138.94)  420.68                80
 07/04/2012   22:22:01   (   0.24,-135.26) (   0.44,-134.40)   98.16                80
 07/06/2012   10:41:07   (  -0.26,-135.29) (   0.69,-139.67)  498.59                80