Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2016   10:15:17   (  -0.03,-135.26) (  -0.71,-132.30)  337.42                80
 12/16/2016   22:34:32   (   0.04,-135.19) (  -0.51,-137.60)  274.36                80
 12/17/2016   22:18:27   (   0.03,-135.17) (   0.53,-133.07)  240.09                80
 12/19/2016   10:37:35   (  -0.05,-135.17) (   0.67,-138.34)  360.91                80
 12/20/2016   10:21:30   (  -0.04,-135.15) (  -0.37,-133.81)  153.28                80
 12/21/2016   22:40:46   (   0.06,-135.08) (  -0.84,-139.11)  459.18                80
 12/22/2016   22:24:40   (   0.05,-135.06) (   0.14,-134.57)   54.90                80
 12/25/2016   10:25:03   (  -0.05,-135.02) (   0.02,-135.31)   32.90                80
 12/26/2016   10:08:57   (  -0.04,-134.99) (  -0.96,-130.77)  480.51                80
 12/27/2016   22:28:13   (   0.05,-134.91) (  -0.24,-136.07)  133.26                80
 12/28/2016   22:12:08   (   0.04,-134.88) (   0.80,-131.55)  379.87                80