Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 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)
 05/10/2019   09:49:05   (   0.06,-128.29) (  -0.50,-125.79)  284.04                80
 05/11/2019   22:08:23   (  -0.05,-128.31) (  -0.68,-131.10)  318.23                80
 05/12/2019   21:52:18   (  -0.06,-128.33) (   0.31,-126.57)  199.90                80
 05/14/2019   10:11:27   (   0.05,-128.35) (   0.83,-131.85)  398.62                80
 05/15/2019   09:55:23   (   0.06,-128.36) (  -0.16,-127.31)  119.16                80
 05/16/2019   22:14:40   (  -0.04,-128.38) (  -1.01,-132.62)  484.04                80
 05/17/2019   21:58:37   (  -0.05,-128.39) (   0.04,-128.10)   33.71                80
 05/20/2019   09:59:02   (   0.04,-128.42) (   0.11,-128.85)   48.18                80
 05/21/2019   09:42:57   (   0.04,-128.43) (  -0.88,-124.31)  469.03                80
 05/22/2019   22:02:14   (  -0.03,-128.43) (  -0.28,-129.63)  135.26                80