Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2021   06:44:16   (  -0.02, -75.24) (   0.27, -76.49)  141.81                80
 05/15/2021   06:22:39   (  -0.03, -75.26) (  -0.77, -71.90)  383.33                80
 05/16/2021   18:46:55   (   0.02, -75.30) (  -0.38, -77.11)  206.30                80
 05/17/2021   18:25:18   (   0.02, -75.32) (   0.67, -72.53)  319.18                80
 05/19/2021   06:49:25   (  -0.01, -75.35) (   0.51, -77.70)  267.47                80
 05/20/2021   06:27:48   (  -0.01, -75.38) (  -0.54, -73.12)  258.37                80
 05/21/2021   18:52:03   (   0.01, -75.42) (  -0.66, -78.32)  330.27                80
 05/22/2021   18:30:25   (   0.01, -75.45) (   0.40, -73.73)  195.94                80
 05/24/2021   06:54:33   (  -0.01, -75.49) (   0.76, -78.91)  389.64                80
 05/25/2021   06:32:55   (  -0.01, -75.52) (  -0.30, -74.33)  136.71                80
 05/26/2021   18:57:11   (   0.01, -75.57) (  -0.88, -79.53)  451.46                80