Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/10/2021   18:33:48   (  -0.02, -75.19) (  -0.05, -75.34)   17.07                80
 01/13/2021   06:39:00   (   0.02, -75.18) (   0.18, -75.94)   85.55                80
 01/14/2021   06:17:22   (   0.01, -75.19) (  -0.82, -71.35)  437.47                80
 01/15/2021   18:38:59   (  -0.01, -75.21) (  -0.34, -76.57)  155.30                80
 01/16/2021   18:22:43   (  -0.01, -75.22) (   0.73, -71.99)  368.42                80
 01/18/2021   06:44:11   (   0.00, -75.23) (   0.46, -77.17)  220.81                80
 01/19/2021   06:22:35   (  -0.00, -75.25) (  -0.61, -72.59)  303.23                80
 01/20/2021   18:44:12   (   0.00, -75.28) (  -0.55, -77.81)  288.30                80
 01/21/2021   18:27:55   (  -0.00, -75.29) (   0.45, -73.22)  236.38                80
 01/23/2021   06:49:23   (   0.01, -75.32) (   0.72, -78.40)  351.21                80