Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/08/2018   10:39:28   (  -0.03,-135.34) (   0.64,-138.21)  327.77                80
 02/09/2018   10:18:03   (  -0.02,-135.36) (  -0.37,-133.68)  190.83                80
 02/10/2018   22:42:38   (   0.01,-135.36) (  -0.81,-138.98)  412.23                80
 02/11/2018   22:21:13   (  -0.00,-135.38) (   0.20,-134.44)  106.17                80
 02/13/2018   10:45:39   (   0.01,-135.41) (   1.00,-139.71)  489.84                80
 02/14/2018   10:24:14   (   0.01,-135.42) (  -0.07,-135.18)   28.09                80
 02/16/2018   22:30:04   (  -0.01,-135.43) (  -0.10,-135.95)   59.06                80
 02/17/2018   22:08:39   (  -0.00,-135.43) (   0.91,-131.41)  458.40                80
 02/19/2018   10:33:05   (   0.00,-135.46) (   0.28,-136.68)  138.94                80
 02/20/2018   10:11:40   (   0.00,-135.46) (  -0.74,-132.14)  378.02                80