Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 6 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/12/2019   06:43:01   (  -0.01, -75.20) (   0.60, -77.97)  315.58                80
 06/13/2019   06:21:26   (  -0.01, -75.20) (  -0.39, -73.39)  205.71                80
 06/14/2019   18:43:07   (   0.00, -75.21) (  -0.78, -78.64)  391.52                80
 06/15/2019   18:26:52   (   0.00, -75.21) (   0.26, -74.07)  130.17                80
 06/17/2019   06:48:24   (  -0.00, -75.23) (   0.92, -79.27)  461.62                80
 06/18/2019   06:26:49   (  -0.01, -75.24) (  -0.12, -74.71)   60.22                80
 06/20/2019   18:29:36   (   0.01, -75.26) (   0.00, -75.39)   14.04                80
 06/23/2019   06:34:53   (  -0.01, -75.31) (   0.15, -76.02)   81.71                80
 06/24/2019   06:13:18   (  -0.01, -75.32) (  -0.89, -71.46)  441.26                80
 06/25/2019   18:34:59   (   0.01, -75.35) (  -0.31, -76.69)  153.48                80