Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2015   10:32:58   (  -0.08,-134.75) (   0.40,-136.75)  229.11                80
 12/29/2015   10:16:52   (  -0.07,-134.70) (  -0.61,-132.22)  282.68                80
 12/30/2015   22:36:08   (   0.08,-134.60) (  -0.56,-137.52)  332.54                80
 12/31/2015   22:20:02   (   0.08,-134.56) (   0.45,-132.99)  179.35                80
 01/02/2016   10:39:09   (  -0.09,-134.52) (   0.76,-138.25)  425.90                80
 01/03/2016   10:23:03   (  -0.08,-134.47) (  -0.25,-133.72)   85.35                80
 01/05/2016   22:23:32   (   0.08,-134.30) (   0.04,-134.48)   20.19                80
 01/06/2016   22:07:26   (   0.07,-134.25) (   1.05,-129.95)  490.77                80
 01/08/2016   10:26:33   (  -0.08,-134.20) (   0.16,-135.21)  115.62                80
 01/09/2016   10:10:27   (  -0.07,-134.14) (  -0.85,-130.68)  394.56                80
 01/10/2016   22:29:42   (   0.08,-134.01) (  -0.36,-135.97)  224.11                80