Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/28/2017   22:28:08   (  -0.02,-135.21) (  -0.23,-136.06)   97.66                80
 11/29/2017   22:12:04   (  -0.03,-135.23) (   0.81,-131.53)  421.27                80
 12/01/2017   10:31:11   (   0.01,-135.35) (   0.36,-136.80)  166.14                80
 12/02/2017   10:15:07   (   0.02,-135.37) (  -0.68,-132.28)  352.21                80
 12/03/2017   22:34:22   (  -0.00,-135.29) (  -0.54,-137.57)  261.39                80
 12/04/2017   22:18:18   (  -0.01,-135.30) (   0.51,-133.05)  256.42                80
 12/06/2017   10:37:25   (  -0.00,-135.41) (   0.66,-138.32)  332.57                80
 12/07/2017   10:21:20   (   0.01,-135.41) (  -0.38,-133.80)  184.88                80
 12/08/2017   22:40:36   (   0.01,-135.32) (  -0.83,-139.09)  429.67                80
 12/09/2017   22:24:30   (   0.01,-135.33) (   0.16,-134.56)   87.60                80