Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 3 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/04/2021   18:31:31   (   0.04, -75.22) (   0.36, -73.86)  155.11                80
 03/06/2021   06:52:59   (  -0.03, -75.22) (   0.83, -79.03)  434.77                80
 03/07/2021   06:31:21   (  -0.03, -75.22) (  -0.18, -74.44)   88.45                80
 03/09/2021   18:36:41   (   0.01, -75.24) (   0.03, -75.07)   19.46                80
 03/12/2021   06:39:12   (   0.00, -75.28) (   0.10, -75.66)   44.51                80
 03/13/2021   06:17:35   (  -0.00, -75.29) (  -0.97, -71.09)  479.85                80
 03/14/2021   18:39:12   (   0.00, -75.32) (  -0.24, -76.29)  111.65                80
 03/15/2021   18:22:55   (   0.00, -75.34) (   0.84, -71.72)  413.44                80
 03/17/2021   06:44:24   (  -0.00, -75.38) (   0.32, -76.90)  173.12                80