Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/10/2016   10:21:55   (   0.05,-135.11) (  -0.25,-133.66)  164.50                80
 05/11/2016   22:41:11   (  -0.05,-135.06) (  -0.94,-138.97)  445.83                80
 05/12/2016   22:25:07   (  -0.05,-135.03) (   0.08,-134.44)   67.58                80
 05/15/2016   10:25:30   (   0.05,-134.97) (   0.12,-135.18)   24.26                80
 05/16/2016   10:09:25   (   0.06,-134.94) (  -0.90,-130.65)  488.77                80
 05/17/2016   22:28:41   (  -0.05,-134.88) (  -0.28,-135.95)  122.52                80
 05/18/2016   22:12:37   (  -0.05,-134.84) (   0.74,-131.42)  390.30                80
 05/20/2016   10:31:44   (   0.04,-134.80) (   0.47,-136.69)  215.53                80
 05/21/2016   10:15:40   (   0.04,-134.76) (  -0.55,-132.16)  296.68                80
 05/22/2016   22:34:56   (  -0.03,-134.69) (  -0.63,-137.47)  316.38                80