Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 6 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/03/2018   22:23:58   (  -0.02,-134.85) (   0.08,-134.41)   50.63                80
 06/06/2018   10:24:21   (   0.01,-134.71) (   0.10,-135.14)   49.17                80
 06/07/2018   10:08:16   (   0.02,-134.66) (  -0.86,-130.60)  462.62                80
 06/08/2018   22:27:32   (  -0.00,-134.62) (  -0.31,-135.90)  146.19                80
 06/09/2018   22:11:28   (  -0.01,-134.58) (   0.72,-131.37)  365.37                80
 06/11/2018   10:30:35   (  -0.01,-134.46) (   0.48,-136.63)  247.72                80
 06/12/2018   10:14:30   (  -0.00,-134.41) (  -0.54,-132.11)  263.05                80
 06/13/2018   22:33:47   (   0.03,-134.35) (  -0.63,-137.41)  347.95                80
 06/14/2018   22:17:41   (   0.02,-134.29) (   0.34,-132.87)  162.53                80
 06/16/2018   10:36:48   (  -0.05,-134.17) (   0.86,-138.13)  451.62                80