Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/11/2021   18:51:00   (   0.03, -75.24) (  -0.74, -78.56)  378.46                80
 06/12/2021   18:34:43   (   0.03, -75.25) (   0.31, -73.97)  145.20                80
 06/14/2021   06:53:30   (  -0.03, -75.25) (   0.84, -79.15)  444.33                80
 06/15/2021   06:37:13   (  -0.03, -75.26) (  -0.21, -74.56)   79.65                80
 06/17/2021   18:39:51   (   0.03, -75.29) (   0.07, -75.19)   11.85                80
 06/20/2021   06:39:40   (  -0.04, -75.31) (   0.09, -75.77)   52.17                80
 06/21/2021   06:23:23   (  -0.03, -75.33) (  -0.96, -71.18)  472.46                80
 06/22/2021   18:42:20   (   0.05, -75.35) (  -0.17, -76.40)  119.15                80
 06/23/2021   18:26:02   (   0.04, -75.37) (   0.82, -71.80)  405.60                80