Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/13/2016   10:32:45   (  -0.09,-134.74) (   0.38,-136.74)  228.86                80
 01/14/2016   10:16:40   (  -0.08,-134.78) (  -0.64,-132.21)  292.33                80
 01/15/2016   22:35:55   (   0.09,-134.78) (  -0.52,-137.52)  311.61                80
 01/16/2016   22:19:49   (   0.09,-134.82) (   0.50,-132.98)  209.29                80
 01/18/2016   10:38:57   (  -0.09,-134.93) (   0.63,-138.26)  378.89                80
 01/19/2016   10:22:50   (  -0.08,-134.97) (  -0.33,-133.72)  141.68                80
 01/20/2016   22:42:05   (   0.08,-134.96) (  -0.83,-139.03)  463.38                80
 01/21/2016   22:26:00   (   0.08,-134.99) (   0.19,-134.49)   56.85                80
 01/24/2016   10:26:21   (  -0.08,-135.13) (  -0.04,-135.23)   12.25                80
 01/26/2016   22:32:11   (   0.08,-135.14) (  -0.10,-136.01)   97.95                80