Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 28.  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   22:28:09   (  -0.02,-135.21) (  -0.22,-136.06)   97.45                80
 11/29/2017   22:12:04   (  -0.03,-135.23) (   0.82,-131.53)  421.57                80
 12/01/2017   10:31:11   (   0.01,-135.35) (   0.35,-136.80)  165.77                80
 12/02/2017   10:15:07   (   0.02,-135.37) (  -0.69,-132.28)  352.66                80
 12/03/2017   22:34:22   (  -0.00,-135.29) (  -0.53,-137.58)  260.72                80
 12/04/2017   22:18:18   (  -0.01,-135.30) (   0.52,-133.05)  257.20                80
 12/06/2017   10:37:25   (  -0.00,-135.41) (   0.65,-138.32)  331.68                80
 12/07/2017   10:21:20   (   0.00,-135.42) (  -0.33,-133.78)  185.85                80
 12/08/2017   22:40:36   (   0.01,-135.33) (  -0.82,-139.10)  428.52                80
 12/09/2017   22:24:30   (   0.01,-135.34) (   0.17,-134.56)   88.83                80
 12/12/2017   10:27:33   (  -0.02,-135.45) (  -0.04,-135.30)   16.68                80