Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 8 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)
 08/10/2012   22:25:41   (  -0.42,-135.05) (  -0.61,-135.86)   92.32                80
 08/11/2012   22:09:36   (  -0.41,-135.06) (   0.41,-131.33)  424.74                80
 08/13/2012   10:31:24   (   0.41,-135.08) (   0.75,-136.61)  174.41                80
 08/14/2012   10:10:00   (   0.41,-135.08) (  -0.28,-132.08)  341.66                80
 08/15/2012   22:31:56   (  -0.41,-135.07) (  -0.90,-137.39)  264.07                80
 08/16/2012   22:15:52   (  -0.41,-135.07) (   0.12,-132.86)  252.41                80
 08/18/2012   10:37:39   (   0.41,-135.08) (   1.10,-138.13)  346.80                80
 08/19/2012   10:16:15   (   0.40,-135.08) (   0.08,-133.60)  168.75                80
 08/20/2012   22:38:11   (  -0.40,-135.05) (  -1.26,-138.90)  439.16                80
 08/21/2012   22:22:06   (  -0.40,-135.04) (  -0.24,-134.38)   76.52                80