Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2020   18:45:11   (   0.00, -75.20) (  -0.80, -78.80)  410.53                80
 07/15/2020   18:28:55   (   0.01, -75.20) (   0.22, -74.22)  111.53                80
 07/17/2020   06:50:25   (  -0.01, -75.20) (   0.92, -79.42)  480.84                80
 07/18/2020   06:28:49   (  -0.01, -75.20) (  -0.09, -74.83)   41.25                80
 07/20/2020   18:31:31   (   0.01, -75.21) (  -0.07, -75.48)   31.33                80
 07/21/2020   18:15:15   (   0.01, -75.21) (   1.00, -70.91)  491.36                80
 07/23/2020   06:36:44   (  -0.01, -75.22) (   0.21, -76.09)  100.06                80
 07/24/2020   06:15:08   (   0.00, -75.22) (  -0.81, -71.51)  422.86                80
 07/25/2020   18:36:46   (  -0.00, -75.24) (  -0.35, -76.74)  170.80                80
 07/26/2020   18:20:30   (  -0.00, -75.25) (   0.67, -72.15)  352.55                80