Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 9 20.  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   (  -0.02, -75.20) (   0.59, -77.95)  312.44                80
 09/23/2018   06:17:40   (  -0.01, -75.21) (  -0.40, -73.41)  204.40                80
 09/24/2018   18:39:37   (   0.01, -75.21) (  -0.76, -78.72)  400.10                80
 09/25/2018   18:23:33   (   0.01, -75.21) (   0.24, -74.19)  117.08                80
 09/27/2018   06:45:21   (  -0.00, -75.23) (   0.96, -79.45)  481.17                80
 09/28/2018   06:26:38   (   0.00, -75.24) (  -0.10, -74.93)   36.32                80
 09/30/2018   18:27:10   (  -0.01, -75.25) (  -0.12, -75.69)   50.24                80
 10/01/2018   18:11:05   (  -0.02, -75.26) (   0.88, -71.16)  467.20                80
 10/03/2018   06:32:54   (   0.02, -75.29) (   0.26, -76.44)  130.80                80
 10/04/2018   06:11:30   (   0.01, -75.30) (  -0.74, -71.91)  386.60                80