Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 10 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)
 10/21/2013   22:35:03   (  -0.16,-134.56) (  -0.79,-137.47)  331.56                80
 10/22/2013   22:18:58   (  -0.18,-134.51) (   0.15,-132.92)  180.24                80
 10/24/2013   10:38:07   (   0.14,-134.49) (   0.96,-138.20)  422.27                80
 10/25/2013   10:22:03   (   0.16,-134.44) (  -0.04,-133.66)   88.90                80
 10/27/2013   22:22:35   (  -0.14,-134.24) (  -0.19,-134.42)   20.80                80
 10/28/2013   22:06:30   (  -0.15,-134.19) (   0.81,-129.88)  490.36                80
 10/30/2013   10:25:38   (   0.12,-134.16) (   0.35,-135.15)  112.87                80
 10/31/2013   10:09:34   (   0.13,-134.10) (  -0.65,-130.62)  397.67                80
 11/01/2013   22:28:50   (  -0.10,-133.94) (  -0.56,-135.91)  224.60                80
 11/02/2013   22:12:46   (  -0.12,-133.88) (   0.45,-131.38)  285.75                80
 11/04/2013   10:31:54   (   0.08,-133.85) (   0.71,-136.64)  318.39                80