Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 10 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/03/2017   10:40:10   (   0.24,-135.45) (   0.88,-138.20)  313.71                80
 10/04/2017   10:18:46   (   0.25,-135.45) (  -0.13,-133.67)  202.00                80
 10/05/2017   22:40:42   (  -0.23,-135.37) (  -1.06,-138.98)  411.65                80
 10/06/2017   22:24:38   (  -0.24,-135.37) (  -0.05,-134.45)  104.24                80
 10/08/2017   10:43:46   (   0.22,-135.43) (   1.20,-139.73)  490.87                80
 10/09/2017   10:27:42   (   0.23,-135.41) (   0.18,-135.20)   23.91                80
 10/11/2017   22:28:13   (  -0.22,-135.30) (  -0.36,-135.98)   77.70                80
 10/12/2017   22:12:08   (  -0.23,-135.28) (   0.60,-131.44)  436.98                80
 10/14/2017   10:31:17   (   0.21,-135.33) (   0.49,-136.73)  159.36                80
 10/15/2017   10:12:32   (   0.22,-135.31) (  -0.47,-132.19)  354.69                80