Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2021   06:44:12   (  -0.01, -75.21) (   0.40, -77.18)  223.95                80
 01/19/2021   06:22:35   (  -0.02, -75.21) (  -0.60, -72.59)  299.48                80
 01/20/2021   18:44:12   (   0.01, -75.23) (  -0.57, -77.80)  293.14                80
 01/21/2021   18:27:56   (   0.01, -75.25) (   0.49, -73.23)  230.93                80
 01/23/2021   06:49:24   (   0.01, -75.27) (   0.69, -78.40)  357.21                80
 01/24/2021   06:27:47   (   0.01, -75.28) (  -0.31, -73.81)  166.84                80
 01/25/2021   18:49:24   (  -0.01, -75.30) (  -0.86, -79.03)  425.72                80
 01/26/2021   18:33:07   (  -0.01, -75.31) (   0.20, -74.45)   98.54                80
 01/28/2021   06:54:36   (   0.01, -75.34) (   0.97, -79.63)  489.27                80
 01/29/2021   06:32:59   (   0.01, -75.36) (  -0.09, -75.06)   35.17                80