Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2019   21:58:36   (  -0.05,-128.40) (   0.01,-128.09)   34.63                80
 05/20/2019   09:59:01   (   0.04,-128.42) (   0.14,-128.84)   47.99                80
 05/21/2019   09:42:57   (   0.04,-128.43) (  -0.85,-124.31)  469.10                80
 05/22/2019   22:02:14   (  -0.03,-128.44) (  -0.32,-129.62)  134.51                80
 05/23/2019   21:46:10   (  -0.04,-128.45) (   0.74,-125.09)  382.72                80
 05/25/2019   10:05:19   (   0.03,-128.45) (   0.46,-130.36)  217.64                80
 05/26/2019   09:49:14   (   0.04,-128.46) (  -0.53,-125.83)  299.17                80
 05/27/2019   22:08:32   (  -0.02,-128.46) (  -0.63,-131.14)  305.48                80
 05/28/2019   21:52:27   (  -0.03,-128.46) (   0.37,-126.60)  211.39                80
 05/30/2019   10:11:36   (   0.01,-128.47) (   0.78,-131.88)  389.19                80
 05/31/2019   09:55:32   (   0.02,-128.47) (  -0.22,-127.35)  127.04                80