Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/16/2017   10:15:09   (   0.07,-134.94) (  -0.51,-132.24)  307.67                80
 11/17/2017   22:34:25   (  -0.05,-134.90) (  -0.67,-137.54)  301.63                80
 11/18/2017   22:18:20   (  -0.06,-134.94) (   0.37,-133.02)  219.01                80
 11/20/2017   10:37:29   (   0.04,-135.09) (   0.75,-138.30)  366.09                80
 11/21/2017   10:21:23   (   0.05,-135.12) (  -0.23,-133.76)  153.99                80
 11/22/2017   22:40:39   (  -0.03,-135.07) (  -0.94,-139.07)  456.68                80
 11/23/2017   22:24:35   (  -0.04,-135.10) (   0.10,-134.55)   63.11                80
 11/26/2017   10:24:58   (   0.03,-135.26) (   0.04,-135.29)    3.58                80
 11/28/2017   22:28:09   (  -0.02,-135.22) (  -0.22,-136.06)   96.22                80
 11/29/2017   22:12:04   (  -0.03,-135.24) (   0.82,-131.54)  422.74                80