Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 6 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/01/2019   22:14:49   (  -0.00,-128.44) (  -0.92,-132.66)  480.29                80
 06/02/2019   21:58:45   (  -0.01,-128.44) (   0.07,-128.13)   35.68                80
 06/05/2019   09:59:09   (  -0.00,-128.41) (   0.12,-128.86)   52.34                80
 06/06/2019   09:43:04   (   0.01,-128.40) (  -0.87,-124.33)  462.81                80
 06/07/2019   22:02:22   (   0.01,-128.38) (  -0.28,-129.64)  143.79                80
 06/08/2019   21:46:17   (  -0.00,-128.37) (   0.71,-125.11)  371.36                80
 06/10/2019   10:05:26   (  -0.02,-128.34) (   0.42,-130.39)  232.66                80
 06/11/2019   09:49:22   (  -0.01,-128.33) (  -0.58,-125.86)  282.11                80
 06/12/2019   22:08:38   (   0.03,-128.30) (  -0.63,-131.15)  325.57                80
 06/13/2019   21:52:34   (   0.02,-128.29) (   0.37,-126.62)  189.22                80
 06/15/2019   10:11:43   (  -0.05,-128.26) (   0.77,-131.90)  415.06                80