Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2018   22:27:51   (   0.32,-135.26) (   0.17,-135.98)   81.89                80
 08/12/2018   22:11:47   (   0.31,-135.24) (   1.15,-131.45)  431.86                80
 08/14/2018   10:30:56   (  -0.33,-135.16) (  -0.01,-136.73)  177.39                80
 08/15/2018   10:14:52   (  -0.33,-135.13) (  -1.00,-132.19)  336.04                80
 08/16/2018   22:34:09   (   0.34,-135.12) (  -0.20,-137.49)  270.34                80
 08/17/2018   22:18:04   (   0.34,-135.10) (   0.79,-132.96)  242.97                80
 08/19/2018   10:37:14   (  -0.36,-135.02) (   0.35,-138.24)  366.75                80
 08/20/2018   10:21:09   (  -0.35,-134.98) (  -0.63,-133.70)  145.90                80
 08/21/2018   22:40:27   (   0.37,-134.96) (  -0.56,-139.01)  461.93                80
 08/22/2018   22:24:23   (   0.37,-134.92) (   0.49,-134.49)   50.67                80
 08/25/2018   10:24:47   (  -0.38,-134.80) (  -0.27,-135.22)   47.57                80