Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 3 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2021   18:39:12   (   0.04, -75.20) (  -0.19, -76.30)  124.91                80
 03/15/2021   18:22:55   (   0.04, -75.21) (   0.83, -71.71)  398.58                80
 03/17/2021   06:44:23   (  -0.04, -75.22) (   0.31, -76.90)  190.55                80
 03/18/2021   06:22:46   (  -0.04, -75.23) (  -0.71, -72.31)  332.92                80
 03/19/2021   18:44:22   (   0.04, -75.24) (  -0.50, -77.51)  260.31                80
 03/20/2021   18:28:06   (   0.03, -75.25) (   0.58, -72.94)  263.63                80
 03/22/2021   06:49:33   (  -0.03, -75.26) (   0.63, -78.11)  324.56                80
 03/23/2021   06:27:55   (  -0.02, -75.27) (  -0.39, -73.52)  199.35                80
 03/24/2021   18:49:33   (   0.01, -75.29) (  -0.74, -78.74)  393.41                80
 03/25/2021   18:33:15   (   0.01, -75.30) (   0.28, -74.15)  131.08                80
 03/27/2021   06:54:44   (  -0.01, -75.33) (   0.88, -79.33)  455.88                80