Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2013   10:18:27   (   0.43,-134.91) (   0.11,-133.63)  146.90                80
 08/23/2013   22:40:24   (  -0.42,-134.90) (  -1.34,-138.92)  458.56                80
 08/24/2013   22:24:20   (  -0.43,-134.92) (  -0.33,-134.39)   59.77                80
 08/27/2013   10:27:27   (   0.42,-135.00) (   0.46,-135.15)   16.96                80
 08/29/2013   22:28:02   (  -0.41,-134.99) (  -0.61,-135.93)  107.06                80
 08/30/2013   22:11:59   (  -0.41,-135.00) (   0.40,-131.40)  410.42                80
 09/01/2013   10:33:48   (   0.40,-135.05) (   0.79,-136.67)  184.55                80
 09/02/2013   10:12:24   (   0.40,-135.06) (  -0.23,-132.14)  332.18                80
 09/03/2013   22:34:23   (  -0.39,-135.02) (  -0.94,-137.45)  277.12                80