Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2012   10:34:48   (   0.32,-135.17) (   0.96,-138.12)  335.53                80
 09/20/2012   10:18:43   (   0.33,-135.19) (  -0.03,-133.58)  183.49                80
 09/21/2012   22:37:59   (  -0.31,-135.19) (  -1.13,-138.89)  422.03                80
 09/22/2012   22:21:53   (  -0.31,-135.21) (  -0.13,-134.36)   96.79                80
 09/24/2012   10:41:01   (   0.29,-135.27) (   1.28,-139.63)  497.29                80
 09/25/2012   10:24:56   (   0.30,-135.29) (   0.23,-135.11)   21.35                80
 09/27/2012   22:25:27   (  -0.28,-135.29) (  -0.39,-135.88)   66.80                80
 09/28/2012   22:09:22   (  -0.29,-135.31) (   0.60,-131.34)  451.84                80
 09/30/2012   10:28:29   (   0.27,-135.36) (   0.55,-136.62)  142.60                80
 10/01/2012   10:12:24   (   0.28,-135.38) (  -0.44,-132.08)  375.47                80