Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2012   10:28:35   (   0.34,-135.03) (   0.68,-136.61)  179.86                80
 09/15/2012   10:12:29   (   0.35,-135.06) (  -0.32,-132.07)  340.12                80
 09/16/2012   22:31:46   (  -0.33,-135.07) (  -0.83,-137.38)  263.20                80
 09/17/2012   22:15:40   (  -0.34,-135.10) (   0.17,-132.85)  256.65                80
 09/19/2012   10:34:48   (   0.32,-135.17) (   0.96,-138.12)  336.61                80
 09/20/2012   10:18:42   (   0.33,-135.19) (  -0.04,-133.59)  182.40                80
 09/21/2012   22:37:57   (  -0.30,-135.18) (  -1.16,-138.89)  423.15                80
 09/22/2012   22:21:52   (  -0.31,-135.20) (  -0.15,-134.35)   95.73                80
 09/24/2012   10:40:59   (   0.28,-135.26) (   1.27,-139.63)  498.34                80
 09/25/2012   10:24:54   (   0.29,-135.27) (   0.26,-135.10)   20.15                80