Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2021   18:41:46   (   0.02, -75.20) (  -0.15, -75.89)   79.39                80
 05/12/2021   18:20:08   (   0.02, -75.21) (   0.88, -71.31)  444.59                80
 05/14/2021   06:44:17   (  -0.02, -75.22) (   0.26, -76.49)  144.64                80
 05/15/2021   06:22:39   (  -0.02, -75.23) (  -0.78, -71.90)  379.47                80
 05/16/2021   18:46:55   (   0.02, -75.25) (  -0.38, -77.12)  211.68                80
 05/17/2021   18:25:18   (   0.01, -75.27) (   0.66, -72.53)  312.77                80
 05/19/2021   06:49:25   (  -0.01, -75.28) (   0.53, -77.70)  275.62                80
 05/20/2021   06:27:48   (  -0.01, -75.30) (  -0.50, -73.11)  249.13                80
 05/21/2021   18:52:04   (   0.01, -75.33) (  -0.65, -78.33)  341.12                80
 05/22/2021   18:30:27   (   0.01, -75.35) (   0.39, -73.74)  183.99                80
 05/24/2021   06:54:34   (  -0.00, -75.37) (   0.80, -78.91)  403.41                80