Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 7 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2016   22:12:27   (   0.18,-135.25) (   1.01,-131.47)  430.42                80
 07/23/2016   10:31:34   (  -0.20,-135.21) (   0.15,-136.74)  174.89                80
 07/24/2016   10:15:28   (  -0.19,-135.18) (  -0.84,-132.20)  338.62                80
 07/25/2016   22:34:45   (   0.21,-135.13) (  -0.31,-137.51)  271.70                80
 07/26/2016   22:18:39   (   0.20,-135.09) (   0.68,-132.98)  241.44                80
 07/28/2016   10:37:47   (  -0.22,-135.04) (   0.48,-138.25)  365.05                80
 07/29/2016   10:21:41   (  -0.22,-135.00) (  -0.51,-133.71)  147.53                80
 07/30/2016   22:40:56   (   0.24,-134.94) (  -0.69,-139.01)  464.19                80
 07/31/2016   22:24:51   (   0.23,-134.90) (   0.30,-134.47)   48.29                80
 08/03/2016   10:25:13   (  -0.25,-134.80) (  -0.13,-135.21)   46.84                80