Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2019   10:05:05   (   0.03,-128.31) (   0.47,-130.33)  229.83                80
 03/23/2019   09:49:00   (   0.03,-128.30) (  -0.54,-125.79)  285.54                80
 03/24/2019   22:10:55   (  -0.03,-128.24) (  -0.66,-131.09)  324.41                80
 03/25/2019   21:49:30   (  -0.03,-128.23) (   0.34,-126.55)  190.67                80
 03/27/2019   10:11:16   (   0.03,-128.23) (   0.85,-131.81)  408.26                80
 03/28/2019   09:55:10   (   0.04,-128.22) (  -0.15,-127.28)  106.66                80
 03/30/2019   21:55:40   (  -0.04,-128.14) (  -0.04,-128.04)   10.87                80
 04/02/2019   09:58:42   (   0.05,-128.12) (   0.17,-128.78)   74.59                80
 04/03/2019   09:42:37   (   0.05,-128.10) (  -0.84,-124.24)  439.89                80