Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 12 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)
 12/13/2013   22:42:15   (   0.09,-135.25) (  -0.74,-139.05)  432.60                80
 12/14/2013   22:26:11   (   0.07,-135.23) (   0.25,-134.51)   81.55                80
 12/17/2013   10:26:38   (  -0.08,-135.21) (  -0.06,-135.25)    5.76                80
 12/19/2013   22:29:54   (   0.09,-135.10) (  -0.09,-136.03)  105.35                80
 12/20/2013   22:13:51   (   0.08,-135.08) (   0.90,-131.50)  408.04                80
 12/22/2013   10:33:01   (  -0.10,-135.07) (   0.27,-136.77)  194.18                80
 12/23/2013   10:16:57   (  -0.09,-135.04) (  -0.72,-132.24)  319.00                80
 12/24/2013   22:36:16   (   0.11,-134.95) (  -0.47,-137.54)  295.04                80
 12/25/2013   22:20:12   (   0.10,-134.92) (   0.53,-133.01)  217.64                80