Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 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)
 03/20/2019   21:43:18   (  -0.03,-128.29) (   0.69,-125.06)  368.18                80
 03/22/2019   10:05:04   (   0.03,-128.31) (   0.51,-130.32)  229.68                80
 03/23/2019   09:46:20   (   0.02,-128.30) (  -0.56,-125.79)  285.75                80
 03/24/2019   22:10:55   (  -0.03,-128.24) (  -0.65,-131.09)  324.44                80
 03/25/2019   21:49:30   (  -0.03,-128.23) (   0.36,-126.56)  190.67                80
 03/27/2019   10:11:16   (   0.03,-128.24) (   0.83,-131.82)  407.97                80
 03/28/2019   09:55:11   (   0.04,-128.22) (  -0.17,-127.28)  106.94                80
 03/30/2019   21:55:41   (  -0.04,-128.14) (  -0.02,-128.04)   10.81                80
 04/02/2019   09:58:41   (   0.05,-128.12) (   0.21,-128.77)   74.12                80
 04/03/2019   09:42:36   (   0.05,-128.10) (  -0.79,-124.23)  440.35                80