Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 6 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2018   10:36:50   (  -0.05,-134.62) (   0.74,-138.15)  402.18                80
 06/17/2018   10:20:46   (  -0.03,-134.67) (  -0.29,-133.63)  119.78                80
 06/18/2018   22:40:02   (   0.06,-134.75) (  -0.89,-138.93)  476.16                80
 06/19/2018   22:23:58   (   0.04,-134.80) (   0.14,-134.40)   45.62                80
 06/22/2018   10:24:21   (  -0.05,-134.90) (   0.02,-135.14)   27.50                80
 06/23/2018   10:08:16   (  -0.04,-134.94) (  -1.01,-130.61)  494.04                80
 06/24/2018   22:27:33   (   0.07,-135.02) (  -0.11,-135.92)  102.80                80
 06/25/2018   22:11:28   (   0.06,-135.05) (   0.87,-131.38)  418.31                80
 06/27/2018   10:30:36   (  -0.09,-135.10) (   0.26,-136.66)  177.65                80
 06/28/2018   10:14:32   (  -0.08,-135.14) (  -0.77,-132.13)  343.13                80