Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/28/2021   06:47:47   (  -0.03, -75.20) (   0.50, -77.44)  256.27                80
 04/29/2021   06:26:09   (  -0.03, -75.20) (  -0.53, -72.85)  267.05                80
 04/30/2021   18:47:45   (   0.02, -75.20) (  -0.62, -78.07)  326.09                80
 05/01/2021   18:31:28   (   0.02, -75.21) (   0.41, -73.48)  197.76                80
 05/03/2021   06:52:56   (  -0.02, -75.23) (   0.75, -78.66)  390.31                80
 05/04/2021   06:31:19   (  -0.02, -75.24) (  -0.28, -74.07)  133.80                80
 05/05/2021   18:52:55   (   0.01, -75.26) (  -0.87, -79.28)  458.24                80
 05/06/2021   18:36:38   (   0.01, -75.28) (   0.16, -74.70)   66.76                80
 05/09/2021   06:36:28   (  -0.01, -75.34) (  -0.04, -75.29)    6.01                80
 05/11/2021   18:39:06   (   0.01, -75.39) (  -0.14, -75.90)   59.88                80