Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 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)
 12/13/2015   10:17:05   (  -0.03,-135.28) (  -0.71,-132.24)  346.72                80
 12/14/2015   22:36:20   (   0.05,-135.22) (  -0.47,-137.54)  265.08                80
 12/15/2015   22:20:15   (   0.04,-135.19) (   0.52,-133.01)  248.78                80
 12/17/2015   10:39:22   (  -0.06,-135.18) (   0.65,-138.28)  354.35                80
 12/18/2015   10:23:17   (  -0.05,-135.15) (  -0.35,-133.75)  158.83                80
 12/19/2015   22:42:32   (   0.07,-135.07) (  -0.83,-139.05)  454.68                80
 12/20/2015   22:26:26   (   0.06,-135.03) (   0.17,-134.52)   58.48                80
 12/23/2015   10:26:48   (  -0.06,-134.97) (  -0.00,-135.26)   32.42                80
 12/24/2015   10:10:43   (  -0.05,-134.93) (  -1.00,-130.72)  479.90                80
 12/25/2015   22:29:57   (   0.06,-134.84) (  -0.22,-136.02)  135.07                80