Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2014   22:48:35   (  -0.34,-134.86) (  -1.28,-138.94)  466.41                80
 09/12/2014   22:32:32   (  -0.35,-134.89) (  -0.23,-134.42)   53.81                80
 09/15/2014   10:35:40   (   0.33,-134.98) (   0.36,-135.17)   21.54                80
 09/16/2014   10:16:57   (   0.34,-135.01) (  -0.63,-130.64)  498.20                80
 09/17/2014   22:36:16   (  -0.32,-135.05) (  -0.53,-135.95)  102.53                80
 09/18/2014   22:20:13   (  -0.33,-135.08) (   0.51,-131.43)  417.05                80
 09/20/2014   10:39:24   (   0.30,-135.13) (   0.64,-136.70)  178.73                80
 09/21/2014   10:23:20   (   0.31,-135.16) (  -0.35,-132.17)  340.49                80
 09/22/2014   22:42:40   (  -0.29,-135.19) (  -0.81,-137.48)  261.35                80
 09/23/2014   22:26:36   (  -0.30,-135.21) (   0.18,-132.95)  257.83                80