Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 9 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)
 09/16/2012   22:31:46   (  -0.33,-135.07) (  -0.83,-137.38)  262.87                80
 09/17/2012   22:15:41   (  -0.34,-135.10) (   0.16,-132.85)  256.94                80
 09/19/2012   10:34:48   (   0.32,-135.17) (   0.99,-138.12)  336.46                80
 09/20/2012   10:18:43   (   0.33,-135.19) (  -0.00,-133.58)  182.49                80
 09/21/2012   22:37:59   (  -0.31,-135.18) (  -1.16,-138.89)  423.15                80
 09/22/2012   22:21:54   (  -0.31,-135.20) (  -0.11,-134.37)   95.61                80
 09/24/2012   10:41:02   (   0.29,-135.26) (   1.26,-139.64)  498.66                80
 09/25/2012   10:24:56   (   0.30,-135.28) (   0.27,-135.10)   19.74                80
 09/27/2012   22:25:27   (  -0.28,-135.28) (  -0.44,-135.88)   68.44                80
 09/28/2012   22:09:23   (  -0.29,-135.30) (   0.61,-131.35)  450.14                80