Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/04/2018   10:20:59   (  -0.27,-135.39) (  -0.68,-133.68)  194.77                80
 08/05/2018   22:40:17   (   0.30,-135.40) (  -0.53,-138.99)  409.90                80
 08/06/2018   22:24:13   (   0.29,-135.38) (   0.51,-134.46)  104.40                80
 08/09/2018   10:27:18   (  -0.31,-135.28) (  -0.36,-135.21)    9.78                80
 08/11/2018   22:27:51   (   0.32,-135.25) (   0.14,-135.98)   83.54                80
 08/12/2018   22:11:47   (   0.31,-135.22) (   1.18,-131.45)  430.03                80
 08/14/2018   10:30:56   (  -0.33,-135.15) (   0.02,-136.72)  179.17                80
 08/15/2018   10:14:51   (  -0.33,-135.12) (  -0.96,-132.18)  333.99                80
 08/16/2018   22:34:09   (   0.34,-135.10) (  -0.17,-137.50)  273.17                80