Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2014   10:32:26   (  -0.08,-135.41) (  -0.07,-135.30)   12.15                80
 12/22/2014   22:35:34   (   0.08,-135.35) (  -0.11,-136.07)   82.32                80
 12/23/2014   22:19:28   (   0.07,-135.34) (   0.94,-131.54)  433.45                80
 12/25/2014   10:38:33   (  -0.09,-135.36) (   0.25,-136.81)  165.67                80
 12/26/2014   10:22:27   (  -0.08,-135.34) (  -0.74,-132.27)  349.49                80
 12/27/2014   22:41:41   (   0.09,-135.28) (  -0.42,-137.58)  261.97                80
 12/28/2014   22:25:35   (   0.09,-135.27) (   0.57,-133.04)  253.19                80
 12/30/2014   10:44:41   (  -0.10,-135.28) (   0.55,-138.32)  346.09                80
 12/31/2014   10:28:35   (  -0.09,-135.26) (  -0.44,-133.78)  168.60                80
 01/01/2015   22:47:48   (   0.10,-135.18) (  -0.77,-139.08)  444.15                80
 01/02/2015   22:31:41   (   0.09,-135.16) (   0.23,-134.54)   70.41                80