Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/21/2019   09:42:57   (   0.05,-128.42) (  -0.88,-124.31)  468.55                80
 05/22/2019   22:02:14   (  -0.03,-128.44) (  -0.29,-129.62)  134.71                80
 05/23/2019   21:46:10   (  -0.04,-128.44) (   0.71,-125.09)  382.34                80
 05/25/2019   10:05:19   (   0.03,-128.44) (   0.43,-130.37)  218.83                80
 05/26/2019   09:49:15   (   0.04,-128.44) (  -0.56,-125.83)  297.82                80
 05/27/2019   22:08:32   (  -0.02,-128.45) (  -0.60,-131.14)  306.56                80
 05/28/2019   21:52:28   (  -0.03,-128.45) (   0.39,-126.61)  210.16                80
 05/30/2019   10:11:36   (   0.01,-128.45) (   0.80,-131.88)  391.16                80
 05/31/2019   09:55:32   (   0.02,-128.45) (  -0.25,-127.36)  124.93                80
 06/01/2019   22:14:49   (   0.00,-128.44) (  -0.97,-132.66)  481.17                80
 06/02/2019   21:58:45   (  -0.01,-128.43) (   0.09,-128.14)   34.83                80