Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/17/2015   22:39:49   (   0.01,-135.09) (  -0.50,-137.48)  272.50                80
 03/18/2015   22:23:43   (   0.01,-135.06) (   0.47,-132.94)  240.77                80
 03/20/2015   10:45:29   (  -0.00,-135.03) (   0.69,-138.21)  363.05                80
 03/21/2015   10:24:03   (  -0.01,-134.99) (  -0.28,-133.67)  149.54                80
 03/22/2015   22:45:57   (   0.01,-134.91) (  -0.92,-138.97)  462.93                80
 03/23/2015   22:29:52   (   0.01,-134.88) (   0.12,-134.45)   49.75                80
 03/26/2015   10:32:51   (  -0.00,-134.80) (   0.06,-135.18)   42.37                80
 03/27/2015   10:11:25   (  -0.01,-134.76) (  -0.92,-130.64)  469.61                80
 03/28/2015   22:33:19   (   0.00,-134.67) (  -0.26,-135.94)  144.02                80
 03/29/2015   22:17:13   (   0.00,-134.63) (   0.72,-131.40)  368.13                80
 03/31/2015   10:38:59   (   0.00,-134.59) (   0.44,-136.68)  236.59                80