Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/09/2020   22:01:50   (  -0.00,-127.88) (  -0.35,-129.53)  188.06                80
 06/10/2020   21:45:45   (   0.00,-127.85) (   0.63,-124.99)  325.37                80
 06/12/2020   10:07:32   (   0.01,-127.82) (   0.55,-130.25)  277.42                80
 06/13/2020   09:46:08   (   0.00,-127.79) (  -0.49,-125.73)  235.41                80
 06/14/2020   22:08:02   (  -0.02,-127.72) (  -0.79,-131.01)  375.85                80
 06/15/2020   21:51:57   (  -0.01,-127.69) (   0.26,-126.48)  137.25                80
 06/17/2020   10:13:45   (   0.02,-127.66) (   0.93,-131.75)  465.51                80
 06/18/2020   09:52:19   (   0.01,-127.62) (  -0.06,-127.21)   46.73                80
 06/20/2020   21:55:30   (  -0.01,-127.50) (  -0.11,-127.98)   54.39                80
 06/21/2020   21:39:25   (  -0.01,-127.45) (   0.88,-123.44)  457.68                80