Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 6 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2019   06:34:52   (   0.01, -75.20) (   0.22, -76.00)   92.81                80
 06/24/2019   06:13:17   (   0.02, -75.20) (  -0.83, -71.44)  428.73                80
 06/25/2019   18:34:58   (  -0.02, -75.21) (  -0.33, -76.69)  167.86                80
 06/26/2019   18:18:43   (  -0.02, -75.22) (   0.66, -72.11)  354.02                80
 06/28/2019   06:40:15   (   0.01, -75.23) (   0.48, -77.32)  238.25                80
 06/29/2019   06:18:41   (   0.01, -75.24) (  -0.56, -72.75)  283.51                80
 06/30/2019   18:40:22   (   0.00, -75.25) (  -0.58, -78.00)  313.09                80
 07/01/2019   18:24:07   (   0.01, -75.26) (   0.40, -73.42)  208.89                80
 07/03/2019   06:45:39   (  -0.01, -75.28) (   0.75, -78.64)  382.97                80
 07/04/2019   06:24:04   (  -0.00, -75.29) (  -0.29, -74.07)  139.20                80