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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/16/2021   18:22:43   (  -0.01, -75.20) (   0.71, -71.98)  366.53                80
 01/18/2021   06:44:12   (   0.00, -75.21) (   0.42, -77.17)  223.66                80
 01/19/2021   06:22:35   (   0.00, -75.21) (  -0.58, -72.58)  299.78                80
 01/20/2021   18:44:12   (  -0.00, -75.23) (  -0.58, -77.80)  292.65                80
 01/21/2021   18:27:54   (  -0.01, -75.25) (   0.42, -73.21)  231.52                80
 01/23/2021   06:49:24   (   0.01, -75.27) (   0.70, -78.40)  357.14                80
 01/24/2021   06:27:46   (   0.01, -75.28) (  -0.30, -73.81)  166.80                80
 01/25/2021   18:49:24   (  -0.01, -75.30) (  -0.86, -79.03)  425.62                80
 01/26/2021   18:33:07   (  -0.00, -75.32) (   0.20, -74.45)   98.67                80
 01/28/2021   06:54:35   (   0.00, -75.34) (   0.97, -79.63)  489.22                80
 01/29/2021   06:32:59   (   0.00, -75.36) (  -0.09, -75.06)   35.24                80