Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 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)
 04/04/2021   18:40:55   (   0.03, -75.20) (  -0.28, -76.58)  157.91                80
 04/05/2021   18:24:38   (   0.03, -75.20) (   0.75, -71.99)  364.93                80
 04/07/2021   06:46:06   (  -0.02, -75.20) (   0.42, -77.17)  225.44                80
 04/08/2021   06:24:29   (  -0.02, -75.20) (  -0.60, -72.58)  297.70                80
 04/09/2021   18:46:05   (   0.02, -75.21) (  -0.56, -77.80)  295.14                80
 04/10/2021   18:29:47   (   0.02, -75.22) (   0.47, -73.21)  228.74                80
 04/12/2021   06:51:16   (  -0.02, -75.23) (   0.71, -78.39)  359.89                80
 04/13/2021   06:29:38   (  -0.02, -75.24) (  -0.32, -73.80)  164.03                80
 04/14/2021   18:51:15   (   0.02, -75.26) (  -0.83, -79.01)  428.20                80
 04/15/2021   18:34:57   (   0.02, -75.27) (   0.19, -74.43)   96.20                80
 04/17/2021   06:56:26   (  -0.02, -75.30) (   0.93, -79.62)  491.47                80