Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 6 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)
 06/26/2017   22:33:44   (   0.08,-135.47) (  -0.33,-137.43)  222.63                80
 06/27/2017   22:17:39   (   0.07,-135.48) (   0.65,-132.89)  294.45                80
 06/29/2017   10:36:46   (  -0.09,-135.44) (   0.52,-138.16)  310.12                80
 06/30/2017   10:20:41   (  -0.08,-135.44) (  -0.51,-133.63)  206.66                80
 07/01/2017   22:39:58   (   0.11,-135.47) (  -0.68,-138.93)  394.59                80
 07/02/2017   22:23:53   (   0.10,-135.47) (   0.36,-134.41)  122.07                80
 07/04/2017   10:43:00   (  -0.12,-135.43) (   0.81,-139.67)  483.02                80
 07/05/2017   10:26:55   (  -0.11,-135.43) (  -0.16,-135.13)   33.06                80
 07/07/2017   22:27:27   (   0.13,-135.44) (   0.02,-135.91)   53.82                80
 07/08/2017   22:11:22   (   0.12,-135.43) (   1.06,-131.38)  461.90                80
 07/10/2017   10:30:30   (  -0.14,-135.37) (   0.11,-136.65)  144.48                80