Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/11/2018   10:30:35   (  -0.01,-134.47) (   0.45,-136.64)  246.67                80
 06/12/2018   10:14:30   (  -0.01,-134.42) (  -0.52,-132.10)  264.38                80
 06/13/2018   22:33:46   (   0.03,-134.37) (  -0.66,-137.40)  345.40                80
 06/14/2018   22:17:42   (   0.02,-134.32) (   0.37,-132.87)  165.33                80
 06/16/2018   10:36:49   (  -0.05,-134.19) (   0.82,-138.14)  449.25                80
 06/17/2018   10:20:44   (  -0.03,-134.13) (  -0.15,-133.59)   61.01                80
 06/19/2018   22:21:14   (   0.04,-134.01) (  -0.06,-134.36)   39.74                80
 06/20/2018   22:05:10   (   0.03,-133.95) (   0.97,-129.83)  470.63                80
 06/22/2018   10:24:17   (  -0.06,-133.82) (   0.22,-135.09)  144.36                80
 06/23/2018   10:08:12   (  -0.05,-133.76) (  -0.75,-130.55)  365.46                80