Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2015   22:13:51   (   0.06,-134.79) (   0.79,-131.48)  376.36                80
 12/28/2015   10:32:59   (  -0.08,-134.75) (   0.36,-136.76)  228.89                80
 12/29/2015   10:16:53   (  -0.07,-134.70) (  -0.64,-132.22)  282.92                80
 12/30/2015   22:36:07   (   0.08,-134.61) (  -0.58,-137.52)  332.27                80
 12/31/2015   22:20:02   (   0.08,-134.56) (   0.43,-132.99)  179.65                80
 01/02/2016   10:39:09   (  -0.09,-134.52) (   0.72,-138.26)  425.50                80
 01/03/2016   10:23:03   (  -0.08,-134.47) (  -0.23,-133.72)   85.83                80
 01/05/2016   22:23:32   (   0.08,-134.31) (   0.03,-134.48)   19.66                80
 01/06/2016   22:07:26   (   0.07,-134.26) (   1.04,-129.95)  491.38                80
 01/08/2016   10:26:32   (  -0.08,-134.21) (   0.16,-135.21)  114.90                80
 01/09/2016   10:10:27   (  -0.07,-134.15) (  -0.85,-130.68)  395.34                80