Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/10/2018   22:17:28   (  -0.04,-135.20) (   0.46,-132.88)  263.05                80
 03/12/2018   10:39:16   (   0.05,-135.14) (   0.71,-138.16)  342.96                80
 03/13/2018   10:17:52   (   0.04,-135.12) (  -0.29,-133.62)  170.08                80
 03/14/2018   22:39:49   (  -0.05,-135.08) (  -0.90,-138.93)  438.75                80
 03/15/2018   22:23:44   (  -0.05,-135.05) (   0.10,-134.40)   74.07                80
 03/18/2018   10:26:48   (   0.05,-134.95) (   0.07,-135.14)   20.53                80
 03/19/2018   10:05:24   (   0.05,-134.92) (  -0.93,-130.61)  491.76                80
 03/20/2018   22:27:20   (  -0.05,-134.87) (  -0.31,-135.90)  118.59                80
 03/21/2018   22:11:17   (  -0.05,-134.83) (   0.75,-131.38)  393.23                80
 03/23/2018   10:33:04   (   0.06,-134.75) (   0.48,-136.64)  215.35                80
 03/24/2018   10:11:39   (   0.06,-134.71) (  -0.52,-132.11)  295.82                80