Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2021   18:21:09   (   0.03, -75.17) (   0.95, -71.05)  470.04                80
 04/23/2021   06:42:38   (  -0.02, -75.18) (   0.22, -76.23)  119.27                80
 04/24/2021   06:21:00   (  -0.02, -75.18) (  -0.81, -71.64)  403.67                80
 04/25/2021   18:42:36   (   0.02, -75.18) (  -0.34, -76.85)  190.79                80
 04/26/2021   18:26:19   (   0.02, -75.18) (   0.69, -72.27)  332.60                80
 04/28/2021   06:47:47   (  -0.02, -75.20) (   0.48, -77.45)  255.80                80
 04/29/2021   06:26:10   (  -0.02, -75.20) (  -0.56, -72.86)  267.48                80
 04/30/2021   18:47:45   (   0.02, -75.20) (  -0.65, -78.06)  326.80                80
 05/01/2021   18:31:28   (   0.02, -75.21) (   0.38, -73.47)  196.98                80
 05/03/2021   06:52:56   (  -0.01, -75.23) (   0.78, -78.65)  390.32                80
 05/04/2021   06:31:18   (  -0.01, -75.24) (  -0.25, -74.06)  133.82                80