Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 9 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/01/2016   10:21:23   (   0.27,-135.34) (  -0.09,-133.59)  198.18                80
 10/02/2016   22:40:40   (  -0.25,-135.29) (  -1.08,-138.91)  412.94                80
 10/03/2016   22:24:36   (  -0.26,-135.27) (  -0.08,-134.38)  101.18                80
 10/06/2016   10:24:59   (   0.25,-135.23) (   0.25,-135.13)   11.54                80
 10/08/2016   22:28:12   (  -0.24,-135.13) (  -0.41,-135.91)   88.58                80
 10/09/2016   22:12:08   (  -0.25,-135.10) (   0.59,-131.38)  424.46                80
 10/11/2016   10:31:16   (   0.22,-135.08) (   0.57,-136.66)  179.95                80
 10/12/2016   10:15:12   (   0.23,-135.04) (  -0.43,-132.13)  332.41                80
 10/13/2016   22:34:29   (  -0.20,-134.96) (  -0.73,-137.44)  282.61                80