Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2018   06:39:05   (  -0.00, -75.20) (   0.59, -77.95)  312.03                80
 09/23/2018   06:17:40   (  -0.00, -75.21) (  -0.41, -73.41)  204.80                80
 09/24/2018   18:39:36   (   0.00, -75.21) (  -0.81, -78.71)  399.44                80
 09/25/2018   18:23:33   (   0.00, -75.22) (   0.25, -74.19)  117.77                80
 09/27/2018   06:45:21   (  -0.00, -75.24) (   0.95, -79.45)  480.59                80
 09/28/2018   06:23:57   (  -0.00, -75.25) (  -0.05, -74.92)   36.85                80
 09/30/2018   18:27:10   (   0.00, -75.26) (  -0.11, -75.69)   49.64                80
 10/01/2018   18:11:06   (   0.00, -75.27) (   0.95, -71.17)  467.83                80
 10/03/2018   06:32:55   (  -0.00, -75.30) (   0.25, -76.44)  130.16                80
 10/04/2018   06:11:30   (  -0.00, -75.31) (  -0.75, -71.91)  387.49                80