Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 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)
 01/29/2021   06:32:57   (   0.01, -75.21) (  -0.01, -75.03)   19.65                80
 01/31/2021   18:35:38   (  -0.00, -75.22) (  -0.10, -75.67)   51.60                80
 02/01/2021   18:19:22   (   0.00, -75.23) (   0.96, -71.09)  471.85                80
 02/03/2021   06:40:49   (  -0.00, -75.24) (   0.25, -76.26)  116.96                80
 02/04/2021   06:19:13   (  -0.00, -75.25) (  -0.81, -71.69)  406.61                80
 02/05/2021   18:40:50   (  -0.01, -75.26) (  -0.37, -76.90)  186.79                80
 02/06/2021   18:24:32   (  -0.01, -75.27) (   0.63, -72.31)  337.23                80
 02/08/2021   06:46:01   (   0.01, -75.30) (   0.52, -77.49)  250.60                80
 02/09/2021   06:24:24   (   0.00, -75.31) (  -0.55, -72.92)  273.33                80
 02/10/2021   18:46:02   (  -0.00, -75.33) (  -0.64, -78.13)  319.83                80