Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 5 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/27/2018   10:14:32   (   0.05,-135.10) (  -0.60,-132.14)  337.50                80
 05/28/2018   22:33:49   (  -0.03,-135.08) (  -0.58,-137.44)  269.37                80
 05/29/2018   22:17:44   (  -0.04,-135.05) (   0.45,-132.91)  243.75                80
 05/31/2018   10:36:52   (   0.02,-134.97) (   0.76,-138.17)  366.07                80
 06/01/2018   10:20:47   (   0.03,-134.93) (  -0.26,-133.64)  146.60                80
 06/02/2018   22:40:03   (  -0.01,-134.90) (  -0.92,-138.95)  461.62                80
 06/03/2018   22:23:59   (  -0.02,-134.86) (   0.11,-134.42)   51.01                80
 06/06/2018   10:24:22   (   0.01,-134.73) (   0.08,-135.15)   47.46                80
 06/07/2018   10:08:16   (   0.03,-134.68) (  -0.89,-130.61)  464.63                80
 06/08/2018   22:27:33   (  -0.00,-134.64) (  -0.28,-135.91)  144.92                80