Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/05/2018   22:36:27   (   0.03,-135.27) (  -0.49,-137.48)  251.93                80
 02/06/2018   22:15:02   (   0.03,-135.30) (   0.58,-132.96)  267.25                80
 02/08/2018   10:39:29   (  -0.02,-135.35) (   0.62,-138.22)  326.74                80
 02/09/2018   10:18:03   (  -0.02,-135.37) (  -0.39,-133.68)  192.06                80
 02/10/2018   22:42:38   (  -0.00,-135.37) (  -0.79,-138.98)  411.29                80
 02/11/2018   22:21:13   (  -0.01,-135.39) (   0.22,-134.45)  107.23                80
 02/13/2018   10:45:39   (   0.01,-135.43) (   0.98,-139.71)  487.85                80
 02/14/2018   10:24:14   (   0.01,-135.44) (  -0.03,-135.18)   30.18                80
 02/16/2018   22:27:24   (  -0.00,-135.44) (  -0.13,-135.94)   57.12                80
 02/17/2018   22:11:18   (  -0.00,-135.45) (   0.88,-131.41)  460.53                80