Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2017   10:20:38   (  -0.16,-135.21) (  -0.54,-133.61)  182.96                80
 07/17/2017   22:39:54   (   0.18,-135.21) (  -0.65,-138.91)  421.79                80
 07/18/2017   22:23:49   (   0.17,-135.18) (   0.33,-134.37)   92.23                80
 07/21/2017   10:26:52   (  -0.19,-135.07) (  -0.21,-135.11)    5.09                80
 07/23/2017   22:27:22   (   0.21,-135.02) (   0.02,-135.87)   97.64                80
 07/24/2017   22:11:17   (   0.20,-134.98) (   1.00,-131.33)  415.63                80
 07/26/2017   10:30:24   (  -0.22,-134.90) (   0.17,-136.60)  194.48                80
 07/27/2017   10:14:19   (  -0.21,-134.86) (  -0.81,-132.06)  318.36                80
 07/28/2017   22:33:35   (   0.23,-134.83) (  -0.35,-137.37)  289.15                80